Add support for the Nucleo-L476 board

2026-06-05 15:58:59 +08:00 · 2016-03-10 11:21:35 -06:00
parent 3217a2992a
commit 02cfe6ea61
22 changed files with 5250 additions and 0 deletions
@@ -685,6 +685,15 @@ config ARCH_BOARD_NUCLEO_F411RE
 		This is a minimal configuration that supports low-level test of the
 		Nucleo F411RE in the NuttX source tree.

+config ARCH_BOARD_NUCLEO_L476RG
+	bool "STM32L476 Nucleo L476RG"
+	depends on ARCH_CHIP_STM32L476RG
+	select ARCH_HAVE_LEDS
+	select ARCH_HAVE_BUTTONS
+	select ARCH_HAVE_IRQBUTTONS
+	---help---
+		STMicro Nucleo L476RG board based on the STMicro STM32L476RGT6 MCU.
+
 config ARCH_BOARD_QEMU_I486
 	bool "Qemu i486 Mode"
 	depends on ARCH_X86 || ARCH_I486
@@ -1367,6 +1376,7 @@ config ARCH_BOARD
 	default "pirelli_dpl10"            if ARCH_BOARD_PIRELLI_DPL10
 	default "nucleo-f303re"            if ARCH_BOARD_NUCLEO_F303RE
 	default "nucleo-f4x1re"            if ARCH_BOARD_NUCLEO_F401RE || ARCH_BOARD_NUCLEO_F411RE
+	default "nucleo-l476rg"            if ARCH_BOARD_NUCLEO_L476RG
 	default "qemu-i486"                if ARCH_BOARD_QEMU_I486
 	default "rgmp"                     if ARCH_BOARD_RGMP
 	default "sabre-6quad"              if ARCH_BOARD_SABRE_6QUAD
@@ -1679,6 +1689,9 @@ endif
 if ARCH_BOARD_NUCLEO_F401RE || ARCH_BOARD_NUCLEO_F411RE
 source "configs/nucleo-f4x1re/Kconfig"
 endif
+if ARCH_BOARD_NUCLEO_L476RG
+source "configs/nucleo-l476rg/Kconfig"
+endif
 if ARCH_BOARD_QEMU_I486
 source "configs/qemu-i486/Kconfig"
 endif
@@ -0,0 +1,21 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_NUCLEO_L476RG
+
+config NUCLEO_L476RG_AJOY_MINBUTTONS
+	bool "Minimal Joystick Buttons"
+	default n if !STM32_USART1
+	default y if STM32_USART1
+	depends on AJOYSTICK
+	---help---
+		The Itead Joystick shield supports analog X/Y position and up to 5
+		buttons.  Some of these buttons may conflict with other resources
+		(Button F, for example, conflicts with the default USART1 pin usage).
+		Selecting this option will return the number of buttons to the
+		minimal set:  SELECT (joystick down), FIRE (BUTTON B), and JUMP
+		(BUTTON A).
+
+endif # ARCH_BOARD_NUCLEO_L476RG
@@ -0,0 +1,234 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/include/board.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_NUCLEO_L476RG_INCLUDE_BOARD_H
+#define __CONFIGS_NUCLEO_L476RG_INCLUDE_BOARD_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#ifndef __ASSEMBLY__
+# include <stdint.h>
+#endif
+
+#include <stm32l4.h>
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Clocking *************************************************************************/
+
+#if defined(CONFIG_ARCH_CHIP_STM32L476RG)
+#  include <arch/board/nucleo-l476rg.h>
+#endif
+
+/* DMA Channel/Stream Selections ****************************************************/
+/* Stream selections are arbitrary for now but might become important in the future
+ * is we set aside more DMA channels/streams.
+ */
+
+/* Values defined in arch/arm/src/stm32l4/chip/stm32l4x6xx_dma.h */
+
+#define DMACHAN_SDMMC DMACHAN_SDMMC_1      /* 2 choices */
+
+#define DMACHAN_SPI1_RX DMACHAN_SPI1_RX_1 /* 2 choices */
+#define DMACHAN_SPI1_TX DMACHAN_SPI1_TX_1 /* 2 choices */
+
+/* UART RX DMA configurations */
+
+#define DMACHAN_USART1_RX DMACHAN_USART1_RX_2
+
+/* Alternate function pin selections ************************************************/
+
+/* USART1:
+ *   RXD: PA10  CN9 pin 3, CN10 pin 33
+ *        PB7   CN7 pin 21
+ *   TXD: PA9   CN5 pin 1, CN10 pin 21
+ *        PB6   CN5 pin 3, CN10 pin 17
+ */
+
+#if 1
+#  define GPIO_USART1_RX GPIO_USART1_RX_1    /* PA10 */
+#  define GPIO_USART1_TX GPIO_USART1_TX_1    /* PA9  */
+#else
+#  define GPIO_USART1_RX GPIO_USART1_RX_2    /* PB7 */
+#  define GPIO_USART1_TX GPIO_USART1_TX_2    /* PB6  */
+#endif
+
+/* USART2: Connected to STLInk Debug via PA2, PA3
+ *   RXD: PA3   CN9 pin 1 (See SB13, 14, 62, 63). CN10 pin 37
+ *        PD6
+ *   TXD: PA2   CN9 pin 2 (See SB13, 14, 62, 63). CN10 pin 35
+ *        PD5
+ */
+
+#define GPIO_USART2_RX   GPIO_USART2_RX_1    /* PA3 */
+#define GPIO_USART2_TX   GPIO_USART2_TX_1    /* PA2 */
+#define GPIO_USART2_RTS  GPIO_USART2_RTS_2
+#define GPIO_USART2_CTS  GPIO_USART2_CTS_2
+
+/* I2C
+ *
+ * The optional _GPIO configurations allow the I2C driver to manually
+ * reset the bus to clear stuck slaves.  They match the pin configuration,
+ * but are normally-high GPIOs.
+ */
+
+#define GPIO_I2C1_SCL    GPIO_I2C1_SCL_2
+#define GPIO_I2C1_SDA    GPIO_I2C1_SDA_2
+#define GPIO_I2C1_SCL_GPIO \
+   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN8)
+#define GPIO_I2C1_SDA_GPIO \
+   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN9)
+
+#define GPIO_I2C2_SCL    GPIO_I2C2_SCL_1
+#define GPIO_I2C2_SDA    GPIO_I2C2_SDA_1
+#define GPIO_I2C2_SCL_GPIO \
+   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN10)
+#define GPIO_I2C2_SDA_GPIO \
+   (GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN11)
+
+/* SPI
+ */
+
+#define GPIO_SPI1_MISO   GPIO_SPI1_MISO_1
+#define GPIO_SPI1_MOSI   GPIO_SPI1_MOSI_1
+#define GPIO_SPI1_SCK    GPIO_SPI1_SCK_1
+
+#define GPIO_SPI2_MISO   GPIO_SPI2_MISO_1
+#define GPIO_SPI2_MOSI   GPIO_SPI2_MOSI_1
+#define GPIO_SPI2_SCK    GPIO_SPI2_SCK_2
+
+/* LEDs
+ *
+ * The Nucleo l476RG board provides a single user LED, LD2.  LD2
+ * is the green LED connected to Arduino signal D13 corresponding to MCU I/O
+ * PA5 (pin 21) or PB13 (pin 34) depending on the STM32 target.
+ *
+ *   - When the I/O is HIGH value, the LED is on.
+ *   - When the I/O is LOW, the LED is off.
+ */
+
+/* LED index values for use with board_userled() */
+
+#define BOARD_LD2         0
+#define BOARD_NLEDS       1
+
+/* LED bits for use with board_userled_all() */
+
+#define BOARD_LD2_BIT     (1 << BOARD_LD2)
+
+/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+ * defined.  In that case, the usage by the board port is defined in
+ * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
+ * events as follows when the red LED (PE24) is available:
+ *
+ *   SYMBOL                Meaning                   LD2
+ *   -------------------  -----------------------  -----------
+ *   LED_STARTED          NuttX has been started     OFF
+ *   LED_HEAPALLOCATE     Heap has been allocated    OFF
+ *   LED_IRQSENABLED      Interrupts enabled         OFF
+ *   LED_STACKCREATED     Idle stack created         ON
+ *   LED_INIRQ            In an interrupt            No change
+ *   LED_SIGNAL           In a signal handler        No change
+ *   LED_ASSERTION        An assertion failed        No change
+ *   LED_PANIC            The system has crashed     Blinking
+ *   LED_IDLE             MCU is is sleep mode       Not used
+ *
+ * Thus if LD2, NuttX has successfully booted and is, apparently, running
+ * normally.  If LD2 is flashing at approximately 2Hz, then a fatal error
+ * has been detected and the system has halted.
+ */
+
+#define LED_STARTED      0
+#define LED_HEAPALLOCATE 0
+#define LED_IRQSENABLED  0
+#define LED_STACKCREATED 1
+#define LED_INIRQ        2
+#define LED_SIGNAL       2
+#define LED_ASSERTION    2
+#define LED_PANIC        1
+
+/* Buttons
+ *
+ *   B1 USER: the user button is connected to the I/O PC13 (pin 2) of the STM32
+ *   microcontroller.
+ */
+
+#define BUTTON_USER        0
+#define NUM_BUTTONS        1
+
+#define BUTTON_USER_BIT    (1 << BUTTON_USER)
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+/************************************************************************************
+ * Name: stm32l4_boardinitialize
+ *
+ * Description:
+ *   All STM32L4 architectures must provide the following entry point.  This entry point
+ *   is called early in the initialization -- after all memory has been configured
+ *   and mapped but before any devices have been initialized.
+ *
+ ************************************************************************************/
+
+void stm32l4_boardinitialize(void);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif  /* __CONFIGS_NUCLEO_F476RG_INCLUDE_BOARD_H */
@@ -0,0 +1,281 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/include/nucleo-l476rg.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_NUCLEO_L476RG_INCLUDE_NUCLEO_L476RG_H
+#define __CONFIGS_NUCLEO_L476RG_INCLUDE_NUCLEO_L476RG_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#ifndef __ASSEMBLY__
+# include <stdint.h>
+#endif
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Clocking *************************************************************************/
+
+/* The NUCLEOL476RG supports both HSE and LSE crystals (X2 and X3).  However, as
+ * shipped, the X3 crystal is not populated.  Therefore the Nucleo-L476RG
+ * will need to run off the 16MHz HSI clock, or the 32khz-synced MSI.
+ *
+ *   System Clock source           : PLL (HSI)
+ *   SYSCLK(Hz)                    : 80000000    Determined by PLL configuration
+ *   HCLK(Hz)                      : 80000000     (STM32L4_RCC_CFGR_HPRE)  (Max 80 MHz)
+ *   AHB Prescaler                 : 1            (STM32L4_RCC_CFGR_HPRE)  (Max 80 MHz)
+ *   APB1 Prescaler                : 1            (STM32L4_RCC_CFGR_PPRE1) (Max 80 MHz)
+ *   APB2 Prescaler                : 1            (STM32L4_RCC_CFGR_PPRE2) (Max 80 MHz)
+ *   HSI Frequency(Hz)             : 16000000     (nominal)
+ *   PLLM                          : 1            (STM32L4_PLLCFG_PLLM)
+ *   PLLN                          : 10           (STM32L4_PLLCFG_PLLN)
+ *   PLLP                          : 0            (STM32L4_PLLCFG_PLLP)
+ *   PLLQ                          : 0            (STM32L4_PLLCFG_PLLQ)
+ *   PLLR                          : 2            (STM32L4_PLLCFG_PLLR)
+
+ *   Flash Latency(WS)             : 4
+ *   Prefetch Buffer               : OFF
+ *   48MHz for USB OTG FS,         : Doable if required using PLLSAI1 or MSI
+ *   SDIO and RNG clock
+ */
+
+/* HSI - 16 MHz RC factory-trimmed
+ * LSI - 32 KHz RC
+ * MSI - variable up to 48 MHz, synchronized to LSE
+ * HSE - not installed
+ * LSE - 32.768 kHz installed
+ */
+
+#define STM32L4_HSI_FREQUENCY     16000000ul
+#define STM32L4_LSI_FREQUENCY     32000
+#define STM32L4_LSE_FREQUENCY     32768
+
+#define STM32L4_BOARD_USEHSI      1
+
+/* REVISIT: Trimming of the HSI and MSI is not yet supported. */
+
+/* Main PLL Configuration.
+ *
+ * Formulae:
+ *
+ *   VCO input frequency        = PLL input clock frequency / PLLM, 1 <= PLLM <= 8
+ *   VCO output frequency       = VCO input frequency × PLLN,       8 <= PLLN <= 86, frequency range 64 to 344 MHz
+ *   PLL output P (SAI3) clock frequency = VCO frequency / PLLP,   PLLP = 7, or 17, or 0 to disable
+ *   PLL output Q (48M1) clock frequency = VCO frequency / PLLQ,   PLLQ = 2, 4, 6, or 8, or 0 to disable
+ *   PLL output R (CLK)  clock frequency = VCO frequency / PLLR,   PLLR = 2, 4, 6, or 8, or 0 to disable
+ *
+ * PLL output P is used for SAI
+ * PLL output Q is used for OTG FS, SDMMC, RNG
+ * PLL output R is used for SYSCLK
+ * PLLP = 0 (not used)
+ * PLLQ = 0 (not used)
+ * PLLR = 2
+ * PLLN = 10
+ * PLLM = 1
+ *
+ * We will configure like this
+ *
+ *   PLL source is HSI
+ *
+ *   PLL_REF  = STM32L4_HSI_FREQUENCY / PLLM
+ *            = 16,000,000 / 1
+ *            = 16,000,000
+ *
+ *   PLL_VCO  = PLL_REF * PLLN
+ *            = 16,000,000 * 10
+ *            = 160,000,000
+ *
+ *   PLL_CLK  = PLL_VCO / PLLR
+ *            = 160,000,000 / 2 = 80,000,000
+ *   PLL_48M1 = disabled
+ *   PLL_SAI3 = disabled
+ *
+ * ----------------------------------------
+ *
+ * PLLSAI1 Configuration
+ *
+ * The clock input and M divider are identical to the main PLL.
+ * However the multiplier and postscalers are independent.
+ * The PLLSAI1 is configured only if CONFIG_STM32L4_SAI1PLL is defined
+ *
+ *   SAI1VCO input frequency        = PLL input clock frequency
+ *   SAI1VCO output frequency       = SAI1VCO input frequency × PLLSAI1N,       8 <= PLLSAI1N <= 86, frequency range 64 to 344 MHz
+ *   SAI1PLL output P (SAI1) clock frequency = SAI1VCO frequency / PLLSAI1P,   PLLP = 7, or 17, or 0 to disable
+ *   SAI1PLL output Q (48M2) clock frequency = SAI1VCO frequency / PLLSAI1Q,   PLLQ = 2, 4, 6, or 8, or 0 to disable
+ *   SAI1PLL output R (ADC1) clock frequency = SAI1VCO frequency / PLLSAI1R,   PLLR = 2, 4, 6, or 8, or 0 to disable
+ *
+ * We will configure like this
+ * 
+ * PLLSAI1 disabled
+ *
+ * ----------------------------------------
+ *
+ * PLLSAI2 Configuration
+ *
+ * The clock input and M divider are identical to the main PLL.
+ * However the multiplier and postscalers are independent.
+ * The PLLSAI2 is configured only if CONFIG_STM32L4_SAI2PLL is defined
+ *
+ *   SAI2VCO input frequency        = PLL input clock frequency
+ *   SAI2VCO output frequency       = SAI2VCO input frequency × PLLSAI2N,       8 <= PLLSAI1N <= 86, frequency range 64 to 344 MHz
+ *   SAI2PLL output P (SAI2) clock frequency = SAI2VCO frequency / PLLSAI2P,   PLLP = 7, or 17, or 0 to disable
+ *   SAI2PLL output R (ADC2) clock frequency = SAI2VCO frequency / PLLSAI2R,   PLLR = 2, 4, 6, or 8, or 0 to disable
+ *
+ * We will configure like this
+ * 
+ * PLLSAI2 disabled
+ *
+ * ----------------------------------------
+ *
+ * TODO: The STM32L is a low power peripheral and all these clocks should be configurable at runtime.
+ *
+ * ----------------------------------------
+ *
+ * TODO These clock sources can be configured in Kconfig (this is not a board feature)
+ * USART1
+ * USART2
+ * USART3
+ * UART4
+ * UART5
+ * LPUART1
+ * I2C1
+ * I2C2
+ * I2C3
+ * LPTIM1
+ * LPTIM2
+ * SAI1
+ * SAI2
+ * CLK48
+ * ADC
+ * SWPMI
+ * DFSDM
+ */
+
+#define STM32L4_PLLCFG_PLLM             RCC_PLLCFG_PLLM(1)
+#define STM32L4_PLLCFG_PLLN             RCC_PLLCFG_PLLN(10)
+#define STM32L4_PLLCFG_PLLP             0
+#undef  STM32L4_PLLCFG_PLLP_ENABLED
+#define STM32L4_PLLCFG_PLLQ             0
+#undef  STM32L4_PLLCFG_PLLQ_ENABLED
+#define STM32L4_PLLCFG_PLLR             RCC_PLLCFG_PLLR(2)
+#define STM32L4_PLLCFG_PLLR_ENABLED
+
+#define STM32L4_PLLSAI1CFG_PLLM         RCC_PLLSAI1CFG_PLLM(1)
+#define STM32L4_PLLSAI1CFG_PLLN         RCC_PLLSAI1CFG_PLLN(10)
+#define STM32L4_PLLSAI1CFG_PLLP         0
+#undef  STM32L4_PLLSAI1CFG_PLLP_ENABLED
+#define STM32L4_PLLSAI1CFG_PLLQ         0
+#undef  STM32L4_PLLSAI1CFG_PLLQ_ENABLED
+#define STM32L4_PLLSAI1CFG_PLLR         RCC_PLLSAI1CFG_PLLR(2)
+#undef  STM32L4_PLLSAI1CFG_PLLR_ENABLED
+
+#define STM32L4_PLLSAI2CFG_PLLM         RCC_PLLSAI2CFG_PLLM(1)
+#define STM32L4_PLLSAI2CFG_PLLN         RCC_PLLSAI2CFG_PLLN(10)
+#define STM32L4_PLLSAI2CFG_PLLP         0
+#undef  STM32L4_PLLSAI2CFG_PLLP_ENABLED
+#define STM32L4_PLLSAI2CFG_PLLR         RCC_PLLSAI2CFG_PLLR(2)
+#undef  STM32L4_PLLSAI2CFG_PLLR_ENABLED
+
+#define STM32L4_SYSCLK_FREQUENCY  80000000ul
+
+/* AHB clock (HCLK) is SYSCLK (80MHz) */
+
+#define STM32L4_RCC_CFGR_HPRE     RCC_CFGR_HPRE_SYSCLK      /* HCLK  = SYSCLK / 1 */
+#define STM32L4_HCLK_FREQUENCY    STM32L4_SYSCLK_FREQUENCY
+#define STM32L4_BOARD_HCLK        STM32L4_HCLK_FREQUENCY      /* Same as above, to satisfy compiler */
+
+/* APB1 clock (PCLK1) is HCLK/1 (80MHz) */
+
+#define STM32L4_RCC_CFGR_PPRE1    RCC_CFGR_PPRE1_HCLK       /* PCLK1 = HCLK / 1 */
+#define STM32L4_PCLK1_FREQUENCY   (STM32L4_HCLK_FREQUENCY/1)
+
+/* Timers driven from APB1 will be twice PCLK1 */
+/* REVISIT : this can be configured */
+
+#define STM32L4_APB1_TIM2_CLKIN   (2*STM32L4_PCLK1_FREQUENCY)
+#define STM32L4_APB1_TIM3_CLKIN   (2*STM32L4_PCLK1_FREQUENCY)
+#define STM32L4_APB1_TIM4_CLKIN   (2*STM32L4_PCLK1_FREQUENCY)
+#define STM32L4_APB1_TIM5_CLKIN   (2*STM32L4_PCLK1_FREQUENCY)
+#define STM32L4_APB1_TIM6_CLKIN   (2*STM32L4_PCLK1_FREQUENCY)
+#define STM32L4_APB1_TIM7_CLKIN   (2*STM32L4_PCLK1_FREQUENCY)
+
+/* APB2 clock (PCLK2) is HCLK (80MHz) */
+
+#define STM32L4_RCC_CFGR_PPRE2    RCC_CFGR_PPRE2_HCLK       /* PCLK2 = HCLK / 1 */
+#define STM32L4_PCLK2_FREQUENCY   (STM32L4_HCLK_FREQUENCY/1)
+
+/* Timers driven from APB2 will be twice PCLK2 */
+/* REVISIT : this can be configured */
+
+#define STM32L4_APB2_TIM1_CLKIN   (2*STM32L4_PCLK2_FREQUENCY)
+#define STM32L4_APB2_TIM8_CLKIN   (2*STM32L4_PCLK2_FREQUENCY)
+
+/* Timer Frequencies, if APBx is set to 1, frequency is same to APBx
+ * otherwise frequency is 2xAPBx.
+ * Note: TIM1,8 are on APB2, others on APB1
+ */
+/* REVISIT : this can be configured */
+
+/* TODO SDMMC */
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif  /* __CONFIGS_NUCLEO_L476RG_INCLUDE_NUCLEO_L476RG_H */
@@ -0,0 +1,112 @@
+############################################################################
+# configs/nucleo-l476rg/nsh/Make.defs
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+LDSCRIPT = l476rg.ld
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
+  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
+else
+  # Linux/Cygwin-native toolchain
+  MKDEP = $(TOPDIR)/tools/mkdeps$(HOSTEXEEXT)
+  ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
+  ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
+ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION = -g
+endif
+
+ifneq ($(CONFIG_DEBUG_NOOPT),y)
+  ARCHOPTIMIZATION += $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef
+ARCHWARNINGSXX = -Wall -Wshadow -Wundef
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+ASMEXT = .S
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDFLAGS += -g
+endif
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -Wundef -g -pipe
+HOSTLDFLAGS =
+
@@ -0,0 +1,64 @@
+#!/bin/bash
+# configs/nucleo-l476rg/nsh/setenv.sh
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+if [ "$_" = "$0" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+  echo "This script must be executed from the top-level NuttX build directory"
+  exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+  export PATH_ORIG="${PATH}"
+fi
+
+# This the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Users/MyName/MentorGraphics/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# This the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${WD}/../buildroot/build_arm_nofpu/staging_dir/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"
@@ -0,0 +1,119 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/scripts/l476rg.ld
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *           Sebastien Lorquet <sebastien@lorquet.fr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The STM32F411RE has 512Kb of FLASH beginning at address 0x0800:0000 and
+ * 128Kb of SRAM beginning at address 0x2000:0000.  When booting from FLASH,
+ * FLASH memory is aliased to address 0x0000:0000 where the code expects to
+ * begin execution by jumping to the entry point in the 0x0800:0000 address
+ * range.
+ */
+
+MEMORY
+{
+    flash (rx) : ORIGIN = 0x08000000, LENGTH = 512K
+    sram (rwx) : ORIGIN = 0x20000000, LENGTH = 96K
+}
+
+OUTPUT_ARCH(arm)
+ENTRY(_stext)
+SECTIONS
+{
+	.text : {
+		_stext = ABSOLUTE(.);
+		*(.vectors)
+		*(.text .text.*)
+		*(.fixup)
+		*(.gnu.warning)
+		*(.rodata .rodata.*)
+		*(.gnu.linkonce.t.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.got)
+		*(.gcc_except_table)
+		*(.gnu.linkonce.r.*)
+		_etext = ABSOLUTE(.);
+	} > flash
+
+	.init_section : {
+		_sinit = ABSOLUTE(.);
+		*(.init_array .init_array.*)
+		_einit = ABSOLUTE(.);
+	} > flash
+
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} > flash
+
+	__exidx_start = ABSOLUTE(.);
+	.ARM.exidx : {
+		*(.ARM.exidx*)
+	} > flash
+	__exidx_end = ABSOLUTE(.);
+
+	_eronly = ABSOLUTE(.);
+
+	/* The STM32L476RG has 96Kb of SRAM beginning at the following address */
+
+	.data : {
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > sram AT > flash
+
+	.bss : {
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > sram
+
+	/* Stabs debugging sections. */
+	.stab 0 : { *(.stab) }
+	.stabstr 0 : { *(.stabstr) }
+	.stab.excl 0 : { *(.stab.excl) }
+	.stab.exclstr 0 : { *(.stab.exclstr) }
+	.stab.index 0 : { *(.stab.index) }
+	.stab.indexstr 0 : { *(.stab.indexstr) }
+	.comment 0 : { *(.comment) }
+	.debug_abbrev 0 : { *(.debug_abbrev) }
+	.debug_info 0 : { *(.debug_info) }
+	.debug_line 0 : { *(.debug_line) }
+	.debug_pubnames 0 : { *(.debug_pubnames) }
+	.debug_aranges 0 : { *(.debug_aranges) }
+}
@@ -0,0 +1,73 @@
+############################################################################
+# configs/nucleo-l476rg/src/Makefile
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+-include $(TOPDIR)/Make.defs
+
+ASRCS =
+CSRCS = stm32_boot.c stm32_spi.c
+
+ifeq ($(CONFIG_HAVE_CXX),y)
+CSRCS += stm32_cxxinitialize.c
+endif
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += stm32_autoleds.c
+else
+CSRCS += stm32_userleds.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS +=  stm32_buttons.c
+endif
+
+ifeq ($(CONFIG_WL_CC3000),y)
+CSRCS += stm32_wireless.c
+ifeq ($(CONFIG_CC3000_PROBES),)
+CSRCS += stm32_io.c
+endif
+endif
+
+ifeq ($(CONFIG_ADC),y)
+CSRCS += stm32_adc.c
+ifeq ($(CONFIG_AJOYSTICK),y)
+CSRCS += stm32_ajoystick.c
+endif
+endif
+
+ifeq ($(CONFIG_NSH_LIBRARY),y)
+CSRCS += stm32_nsh.c
+endif
+
+include $(TOPDIR)/configs/Board.mk
@@ -0,0 +1,336 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/src/nucleo-l476rg.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Authors: Frank Bennett
+ *            Gregory Nutt <gnutt@nuttx.org>
+ *            Sebastien Lorquet <sebastien@lorquet.fr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_NUCLEO_L476RG_SRC_NUCLEO_L476RG_H
+#define __CONFIGS_NUCLEO_L476RG_SRC_NUCLEO_L476RG_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <stdint.h>
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Configuration ********************************************************************/
+
+#define HAVE_MMCSD 1
+#if !defined(CONFIG_STM32_SDIO) || !defined(CONFIG_MMCSD) || \
+    !defined(CONFIG_MMCSD_SDIO)
+#  undef HAVE_MMCSD
+#endif
+
+/* LED.  User LD2: the green LED is a user LED connected to Arduino signal D13
+ * corresponding to MCU I/O PA5 (pin 21) or PB13 (pin 34) depending on the STM32
+ * target.
+ *
+ * - When the I/O is HIGH value, the LED is on.
+ * - When the I/O is LOW, the LED is off.
+ */
+
+#define GPIO_LD2 \
+  (GPIO_PORTA | GPIO_PIN5 | GPIO_OUTPUT_CLEAR | GPIO_OUTPUT | GPIO_PULLUP | \
+   GPIO_SPEED_50MHz)
+
+/* Buttons
+ *
+ * B1 USER: the user button is connected to the I/O PC13 (pin 2) of the STM32
+ * microcontroller.
+ */
+
+#define MIN_IRQBUTTON   BUTTON_USER
+#define MAX_IRQBUTTON   BUTTON_USER
+#define NUM_IRQBUTTONS  1
+
+#define GPIO_BTN_USER \
+  (GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTC | GPIO_PIN13)
+
+/* The shield uses the following pins:
+ *
+ *   +5V
+ *   GND
+ *  SERIAL_TX=PA_2    USER_BUTTON=PC_13
+ *  SERIAL_RX=PA_3            LD2=PA_5
+ *
+ * Analog                         Digital
+ *  A0=PA_0    USART2RX D0=PA_3              D8 =PA_9
+ *  A1=PA_1    USART2TX D1=PA_2              D9 =PC_7
+ *  A2=PA_4             D2=PA_10     WIFI_CS=D10=PB_6 SPI_CS
+ *  A3=PB_0    WIFI_INT=D3=PB_3              D11=PA_7 SPI_MOSI
+ *  A4=PC_1       SD_CS=D4=PB_5              D12=PA_6 SPI_MISO
+ *  A5=PC_0     WIFI_EN=D5=PB_4          LD2=D13=PA_5 SPI_SCK
+ *                 LED2=D6=PB_10    I2C1_SDA=D14=PB_9 WIFI Probe
+ *                      D7=PA_8     I2C1_SCL=D15=PB_8 WIFI Probe
+ *
+ *  mostly from: https://mbed.org/platforms/ST-Nucleo-F401RE/
+ *
+ */
+
+#ifdef CONFIG_WL_CC3000
+#  define GPIO_WIFI_INT (GPIO_PORTB | GPIO_PIN3 | GPIO_INPUT | \
+                         GPIO_PULLUP | GPIO_EXTI)
+#  define GPIO_WIFI_EN  (GPIO_PORTB | GPIO_PIN4 | GPIO_OUTPUT_CLEAR | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_WIFI_CS  (GPIO_PORTB | GPIO_PIN6 | GPIO_OUTPUT_SET | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_D14      (GPIO_PORTB | GPIO_PIN9 | GPIO_OUTPUT_CLEAR | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_D15      (GPIO_PORTB | GPIO_PIN8 | GPIO_OUTPUT_CLEAR | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_D0       (GPIO_PORTA | GPIO_PIN3 | GPIO_INPUT | \
+                         GPIO_PULLUP)
+#  define GPIO_D1       (GPIO_PORTA | GPIO_PIN2 | GPIO_OUTPUT_CLEAR | \
+                         GPIO_PULLUP)
+#  define GPIO_D2       (GPIO_PORTA | GPIO_PIN10 | GPIO_OUTPUT_CLEAR | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_A0       (GPIO_PORTA | GPIO_PIN0 | GPIO_OUTPUT_SET | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_A1       (GPIO_PORTA | GPIO_PIN1 | GPIO_OUTPUT_SET | \
+                         GPIO_OUTPUT | GPIO_PULLUP | GPIO_SPEED_50MHz)
+#  define GPIO_A2       (GPIO_PORTA | GPIO_PIN4 | GPIO_INPUT | \
+                         GPIO_PULLUP)
+#  define GPIO_A3       (GPIO_PORTB | GPIO_PIN0 | GPIO_INPUT | \
+                         GPIO_PULLUP)
+#endif
+
+/* SPI1 off */
+
+#define GPIO_SPI1_MOSI_OFF (GPIO_INPUT | GPIO_PULLDOWN | \
+                            GPIO_PORTA | GPIO_PIN7)
+#define GPIO_SPI1_MISO_OFF (GPIO_INPUT | GPIO_PULLDOWN | \
+                            GPIO_PORTA | GPIO_PIN6)
+#define GPIO_SPI1_SCK_OFF  (GPIO_INPUT | GPIO_PULLDOWN | \
+                            GPIO_PORTA | GPIO_PIN5)
+
+/* SPI1 chip selects off */
+
+#ifdef CONFIG_WL_CC3000
+#  define GPIO_SPI_CS_WIFI_OFF \
+    (GPIO_INPUT | GPIO_PULLDOWN | GPIO_SPEED_2MHz | \
+     GPIO_PORTB | GPIO_PIN6)
+#endif
+
+#ifdef HAVE_MMCSD
+#  define GPIO_SPI_CS_SD_CARD_OFF \
+    (GPIO_INPUT | GPIO_PULLDOWN | GPIO_SPEED_2MHz | \
+     GPIO_PORTB | GPIO_PIN5)
+#endif
+
+/* SPI chip selects */
+
+#ifdef CONFIG_WL_CC3000
+#  define GPIO_SPI_CS_WIFI \
+    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+     GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN6)
+#endif
+
+#ifdef HAVE_MMCSD
+#  define GPIO_SPI_CS_SD_CARD \
+    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+     GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN5)
+#endif
+
+/* Devices on the onboard bus.
+ *
+ * Note that these are unshifted addresses.
+ */
+
+#define NUCLEO_I2C_OBDEV_LED       0x55
+#define NUCLEO_I2C_OBDEV_HMC5883   0x1e
+
+/* User GPIOs
+ *
+ * GPIO0-1 are for probing WIFI status
+ */
+
+#ifdef CONFIG_WL_CC3000
+#  define GPIO_GPIO0_INPUT \
+    (GPIO_INPUT | GPIO_PULLUP | GPIO_PORTB | GPIO_PIN8)
+#  define GPIO_GPIO1_INPUT \
+    (GPIO_INPUT | GPIO_PULLUP | GPIO_PORTB | GPIO_PIN9)
+#  define GPIO_GPIO0_OUTPUT \
+    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+     GPIO_OUTPUT_CLEAR | GPIO_PORTB | GPIO_PIN8)
+#  define GPIO_GPIO1_OUTPUT \
+    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+     GPIO_OUTPUT_CLEAR | GPIO_PORTB | GPIO_PIN9)
+#endif
+
+/* Itead Joystick Shield
+ *
+ * See http://imall.iteadstudio.com/im120417014.html for more information
+ * about this joystick.
+ *
+ *   --------- ----------------- ---------------------------------
+ *   ARDUINO   ITEAD             NUCLEO-F4x1
+ *   PIN NAME  SIGNAL            SIGNAL
+ *   --------- ----------------- ---------------------------------
+ *    D3       Button E Output   PB3
+ *    D4       Button D Output   PB5
+ *    D5       Button C Output   PB4
+ *    D6       Button B Output   PB10
+ *    D7       Button A Output   PA8
+ *    D8       Button F Output   PA9
+ *    D9       Button G Output   PC7
+ *    A0       Joystick Y Output PA0  ADC1_0
+ *    A1       Joystick X Output PA1  ADC1_1
+ *   --------- ----------------- ---------------------------------
+ *
+ *   All buttons are pulled on the shield.  A sensed low value indicates
+ *   when the button is pressed.
+ *
+ *   NOTE: Button F cannot be used with the default USART1 configuration
+ *   because PA9 is configured for USART1_RX by default.  Use select
+ *   different USART1 pins in the board.h file or select a different
+ *   USART or select CONFIG_NUCLEO_L476RG_AJOY_MINBUTTONS which will
+ *   eliminate all but buttons A, B, and C.
+ */
+
+#define ADC_XOUPUT   1 /* X output is on ADC channel 1 */
+#define ADC_YOUPUT   0 /* Y output is on ADC channel 0 */
+
+#define GPIO_BUTTON_A \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTA | GPIO_PIN8)
+#define GPIO_BUTTON_B \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTB | GPIO_PIN10)
+#define GPIO_BUTTON_C \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTB | GPIO_PIN4)
+#define GPIO_BUTTON_D \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTB | GPIO_PIN5)
+#define GPIO_BUTTON_E \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTB | GPIO_PIN3)
+#define GPIO_BUTTON_F \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTA | GPIO_PIN9)
+#define GPIO_BUTTON_G \
+  (GPIO_INPUT | GPIO_PULLUP |GPIO_EXTI | GPIO_PORTC | GPIO_PIN7)
+
+/* Itead Joystick Signal interpretation:
+ *
+ *   --------- ----------------------- ---------------------------
+ *   BUTTON     TYPE                    NUTTX ALIAS
+ *   --------- ----------------------- ---------------------------
+ *   Button A  Large button A          JUMP/BUTTON 3
+ *   Button B  Large button B          FIRE/BUTTON 2
+ *   Button C  Joystick select button  SELECT/BUTTON 1
+ *   Button D  Tiny Button D           BUTTON 6
+ *   Button E  Tiny Button E           BUTTON 7
+ *   Button F  Large Button F          BUTTON 4
+ *   Button G  Large Button G          BUTTON 5
+ *   --------- ----------------------- ---------------------------
+ */
+
+#define GPIO_BUTTON_1 GPIO_BUTTON_C
+#define GPIO_BUTTON_2 GPIO_BUTTON_B
+#define GPIO_BUTTON_3 GPIO_BUTTON_A
+#define GPIO_BUTTON_4 GPIO_BUTTON_F
+#define GPIO_BUTTON_5 GPIO_BUTTON_G
+#define GPIO_BUTTON_6 GPIO_BUTTON_D
+#define GPIO_BUTTON_7 GPIO_BUTTON_E
+
+#define GPIO_SELECT   GPIO_BUTTON_1
+#define GPIO_FIRE     GPIO_BUTTON_2
+#define GPIO_JUMP     GPIO_BUTTON_3
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+/* Global driver instances */
+
+#ifdef CONFIG_STM32_SPI1
+extern struct spi_dev_s *g_spi1;
+#endif
+#ifdef CONFIG_STM32_SPI2
+extern struct spi_dev_s *g_spi2;
+#endif
+#ifdef HAVE_MMCSD
+extern struct sdio_dev_s *g_sdio;
+#endif
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_spiinitialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins.
+ *
+ ************************************************************************************/
+
+void stm32_spiinitialize(void);
+
+/************************************************************************************
+ * Name: stm32_usbinitialize
+ *
+ * Description:
+ *   Called to setup USB-related GPIO pins.
+ *
+ ************************************************************************************/
+
+void stm32_usbinitialize(void);
+
+/************************************************************************************
+ * Name: board_adc_initialize
+ *
+ * Description:
+ *   Initialize and register the ADC driver(s)
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_ADC
+int board_adc_initialize(void);
+#endif
+
+/****************************************************************************
+ * Name: board_ajoy_initialize
+ *
+ * Description:
+ *   Initialize and register the button joystick driver
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AJOYSTICK
+int board_ajoy_initialize(void);
+#endif
+
+#endif /* __CONFIGS_NUCLEO_L476RG_SRC_NUCLEO_L476RG_H */
@@ -0,0 +1,181 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/src/stm32_adc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <nuttx/analog/adc.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "up_arch.h"
+
+#include "stm32l4_pwm.h"
+#include "nucleo-l476rg.h"
+
+#ifdef CONFIG_STM32_ADC1
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* The number of ADC channels in the conversion list */
+
+#ifdef CONFIG_ADC_DMA
+#  define ADC1_NCHANNELS 2
+#else
+#  define ADC1_NCHANNELS 1
+#endif
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+/* Identifying number of each ADC channel. */
+
+#ifdef CONFIG_STM32_ADC1
+#ifdef CONFIG_AJOYSTICK
+#ifdef CONFIG_ADC_DMA
+/* The Itead analog joystick gets inputs on ADC_IN0 and ADC_IN1 */
+
+static const uint8_t  g_adc1_chanlist[ADC1_NCHANNELS] = {0, 1};
+
+/* Configurations of pins used byte each ADC channels */
+
+static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS]  = {GPIO_ADC1_IN0, GPIO_ADC1_IN0};
+
+#else
+/* Without DMA, only a single channel can be supported */
+
+/* The Itead analog joystick gets input on ADC_IN0 */
+
+static const uint8_t  g_adc1_chanlist[ADC1_NCHANNELS] = {0};
+
+/* Configurations of pins used byte each ADC channels */
+
+static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS]  = {GPIO_ADC1_IN0};
+
+#endif /* CONFIG_ADC_DMA */
+#endif /* CONFIG_AJOYSTICK */
+#endif /* CONFIG_STM32_ADC1*/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: board_adc_initialize
+ *
+ * Description:
+ *   Initialize and register the ADC driver
+ *
+ ************************************************************************************/
+
+int board_adc_initialize(void)
+{
+  static bool initialized = false;
+  struct adc_dev_s *adc;
+  int ret;
+  int i;
+
+  /* Check if we have already initialized */
+
+  if (!initialized)
+    {
+#ifdef CONFIG_STM32_ADC1
+      /* Configure the pins as analog inputs for the selected channels */
+
+      for (i = 0; i < ADC1_NCHANNELS; i++)
+        {
+          stm32_configgpio(g_adc1_pinlist[i]);
+        }
+
+      /* Call stm32_adcinitialize() to get an instance of the ADC interface */
+
+      adc = stm32_adcinitialize(1, g_adc1_chanlist, ADC1_NCHANNELS);
+      if (adc == NULL)
+        {
+          adbg("ERROR: Failed to get ADC interface\n");
+          return -ENODEV;
+        }
+
+      /* Register the ADC driver at "/dev/adc0" */
+
+      ret = adc_register("/dev/adc0", adc);
+      if (ret < 0)
+        {
+          adbg("adc_register failed: %d\n", ret);
+          return ret;
+        }
+#endif
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+/************************************************************************************
+ * Name: board_adc_setup
+ *
+ * Description:
+ *   All STM32 architectures must provide the following interface to work with
+ *   examples/adc.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_EXAMPLES_ADC
+int board_adc_setup(void)
+{
+#ifdef CONFIG_SAMA5_ADC
+  return board_adc_initialize();
+#else
+  return -ENOSYS;
+#endif
+}
+#endif /* CONFIG_EXAMPLES_ADC */
+
+#endif /* CONFIG_STM32_ADC1 */
@@ -0,0 +1,120 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/src/stm32l4_autoleds.c
+ *
+ *   Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "up_arch.h"
+#include "up_internal.h"
+#include "stm32l4.h"
+#include "nucleo-l476rg.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+#  define leddbg  lldbg
+#  define ledvdbg llvdbg
+#else
+#  define leddbg(x...)
+#  define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_autoled_initialize
+ ****************************************************************************/
+
+void board_autoled_initialize(void)
+{
+  /* Configure LD2 GPIO for output */
+
+  stm32l4_configgpio(GPIO_LD2);
+}
+
+/****************************************************************************
+ * Name: board_autoled_on
+ ****************************************************************************/
+
+void board_autoled_on(int led)
+{
+  if (led == 1)
+    {
+      stm32l4_gpiowrite(GPIO_LD2, true);
+    }
+}
+
+/****************************************************************************
+ * Name: board_autoled_off
+ ****************************************************************************/
+
+void board_autoled_off(int led)
+{
+  if (led == 1)
+    {
+      stm32l4_gpiowrite(GPIO_LD2, false);
+    }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
@@ -0,0 +1,133 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/src/stm32_boot.c
+ *
+ *   Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *           Librae <librae8226@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <nuttx/spi/spi.h>
+
+#include <arch/board/board.h>
+
+#include "up_arch.h"
+#include "nucleo-l476rg.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32l4_boardinitialize
+ *
+ * Description:
+ *   All STM32L4 architectures must provide the following entry point.  This entry point
+ *   is called early in the initialization -- after all memory has been configured
+ *   and mapped but before any devices have been initialized.
+ *
+ ************************************************************************************/
+
+void stm32l4_boardinitialize(void)
+{
+  /* Configure on-board LEDs if LED support has been selected. */
+
+#ifdef CONFIG_ARCH_LEDS
+  board_autoled_initialize();
+#endif
+
+  /* Configure SPI chip selects if 1) SP2 is not disabled, and 2) the weak function
+   * stm32_spiinitialize() has been brought into the link.
+   */
+
+#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3)
+  stm32l4_spiinitialize();
+#endif
+
+  /* Initialize USB is 1) USBDEV is selected, 2) the USB controller is not
+   * disabled, and 3) the weak function stm32_usbinitialize() has been brought
+   * into the build.
+   */
+
+#if defined(CONFIG_USBDEV) && defined(CONFIG_STM32_USB)
+  stm32l4_usbinitialize();
+#endif
+}
+
+/****************************************************************************
+ * Name: board_initialize
+ *
+ * Description:
+ *   If CONFIG_BOARD_INITIALIZE is selected, then an additional
+ *   initialization call will be performed in the boot-up sequence to a
+ *   function called board_initialize().  board_initialize() will be
+ *   called immediately after up_intiialize() is called and just before the
+ *   initial application is started.  This additional initialization phase
+ *   may be used, for example, to initialize board-specific device drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_INITIALIZE
+void board_initialize(void)
+{
+  /* Perform NSH initialization here instead of from the NSH.  This
+   * alternative NSH initialization is necessary when NSH is ran in user-space
+   * but the initialization function must run in kernel space.
+   */
+
+#if defined(CONFIG_NSH_LIBRARY) && !defined(CONFIG_NSH_ARCHINIT)
+  board_app_initialize();
+#endif
+
+  /* CC3000 wireless initialization */
+
+#ifdef CONFIG_WL_CC3000
+  wireless_archinitialize(0);
+#endif
+}
+#endif
@@ -0,0 +1,138 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/src/stm32_buttons.c
+ *
+ *   Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "nucleo-l476rg.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.
+ *   After that, board_buttons() may be called to collect the current state
+ *   of all buttons or board_button_irq() may be called to register button
+ *   interrupt handlers.
+ *
+ ****************************************************************************/
+
+void board_button_initialize(void)
+{
+  /* Configure the single button as an input.  NOTE that EXTI interrupts are
+   * also configured for the pin.
+   */
+
+  stm32_configgpio(GPIO_BTN_USER);
+}
+
+/****************************************************************************
+ * Name: board_buttons
+ ****************************************************************************/
+
+uint8_t board_buttons(void)
+{
+  /* Check that state of each USER button. A LOW value means that the key is
+   * pressed.
+   */
+
+  bool released = stm32_gpioread(GPIO_BTN_USER);
+  return !released;
+}
+
+/************************************************************************************
+ * Button support.
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.  After
+ *   that, board_buttons() may be called to collect the current state of all
+ *   buttons or board_button_irq() may be called to register button interrupt
+ *   handlers.
+ *
+ *   After board_button_initialize() has been called, board_buttons() may be called to
+ *   collect the state of all buttons.  board_buttons() returns an 8-bit bit set
+ *   with each bit associated with a button.  See the BUTTON_*_BIT
+ *   definitions in board.h for the meaning of each bit.
+ *
+ *   board_button_irq() may be called to register an interrupt handler that will
+ *   be called when a button is depressed or released.  The ID value is a
+ *   button enumeration value that uniquely identifies a button resource. See the
+ *   BUTTON_* definitions in board.h for the meaning of enumeration
+ *   value.  The previous interrupt handler address is returned (so that it may
+ *   restored, if so desired).
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_ARCH_IRQBUTTONS
+xcpt_t board_button_irq(int id, xcpt_t irqhandler)
+{
+  xcpt_t oldhandler = NULL;
+
+  if (id == BUTTON_USER)
+    {
+      oldhandler = stm32_gpiosetevent(GPIO_BTN_USER, true, true, true, irqhandler);
+    }
+
+  return oldhandler;
+}
+#endif
+#endif /* CONFIG_ARCH_BUTTONS */
@@ -0,0 +1,154 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/src/stm32_cxxinitialize.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include <nuttx/arch.h>
+
+#include <arch/stm32l4/chip.h>
+#include "chip.h"
+
+#if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Debug ****************************************************************************/
+/* Non-standard debug that may be enabled just for testing the static constructors */
+
+#ifndef CONFIG_DEBUG
+#  undef CONFIG_DEBUG_CXX
+#endif
+
+#ifdef CONFIG_DEBUG_CXX
+#  define cxxdbg              dbg
+#  define cxxlldbg            lldbg
+#  ifdef CONFIG_DEBUG_VERBOSE
+#    define cxxvdbg           vdbg
+#    define cxxllvdbg         llvdbg
+#  else
+#    define cxxvdbg(x...)
+#    define cxxllvdbg(x...)
+#  endif
+#else
+#  define cxxdbg(x...)
+#  define cxxlldbg(x...)
+#  define cxxvdbg(x...)
+#  define cxxllvdbg(x...)
+#endif
+
+/************************************************************************************
+ * Private Types
+ ************************************************************************************/
+/* This type defines one entry in initialization array */
+
+typedef void (*initializer_t)(void);
+
+/************************************************************************************
+ * External references
+ ************************************************************************************/
+/* _sinit and _einit are symbols exported by the linker script that mark the
+ * beginning and the end of the C++ initialization section.
+ */
+
+extern initializer_t _sinit;
+extern initializer_t _einit;
+
+/* _stext and _etext are symbols exported by the linker script that mark the
+ * beginning and the end of text.
+ */
+
+extern uint32_t _stext;
+extern uint32_t _etext;
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/****************************************************************************
+ * Name: up_cxxinitialize
+ *
+ * Description:
+ *   If C++ and C++ static constructors are supported, then this function
+ *   must be provided by board-specific logic in order to perform
+ *   initialization of the static C++ class instances.
+ *
+ *   This function should then be called in the application-specific
+ *   user_start logic in order to perform the C++ initialization.  NOTE
+ *   that no component of the core NuttX RTOS logic is involved; This
+ *   function defintion only provides the 'contract' between application
+ *   specific C++ code and platform-specific toolchain support
+ *
+ ****************************************************************************/
+
+void up_cxxinitialize(void)
+{
+  initializer_t *initp;
+
+  cxxdbg("_sinit: %p _einit: %p _stext: %p _etext: %p\n",
+         &_sinit, &_einit, &_stext, &_etext);
+
+  /* Visit each entry in the initialzation table */
+
+  for (initp = &_sinit; initp != &_einit; initp++)
+    {
+      initializer_t initializer = *initp;
+      cxxdbg("initp: %p initializer: %p\n", initp, initializer);
+
+      /* Make sure that the address is non-NULL and lies in the text region
+       * defined by the linker script.  Some toolchains may put NULL values
+       * or counts in the initialization table
+       */
+
+      if ((void*)initializer > (void*)&_stext && (void*)initializer < (void*)&_etext)
+        {
+          cxxdbg("Calling %p\n", initializer);
+          initializer();
+        }
+    }
+}
+
+#endif /* CONFIG_HAVE_CXX && CONFIG_HAVE_CXXINITIALIZE */
+
@@ -0,0 +1,196 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/src/stm32_io.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <arch/board/board.h>
+#include "chip/stm32l4_tim.h"
+
+#include "nucleo-l476rg.h"
+
+#ifndef CONFIG_CC3000_PROBES
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_leds
+ *
+ * Description:
+ *
+ ****************************************************************************/
+
+void up_leds(int r, int g ,int b, int freqs)
+{
+  long fosc = 72000000;
+  long prescale = 2048;
+  long p1s = fosc/prescale;
+  long p0p5s  = p1s/2;
+  long p;
+
+  static struct stm32_tim_dev_s *tim1 = 0;
+
+  if (tim1 == 0)
+    {
+      tim1 = stm32_tim_init(1);
+      STM32_TIM_SETMODE(tim1, STM32_TIM_MODE_UP);
+      STM32_TIM_SETCLOCK(tim1, p1s-8);
+      STM32_TIM_SETPERIOD(tim1, p1s);
+      STM32_TIM_SETCOMPARE(tim1, 1, 0);
+      STM32_TIM_SETCOMPARE(tim1, 2, 0);
+      STM32_TIM_SETCOMPARE(tim1, 3, 0);
+      STM32_TIM_SETCHANNEL(tim1, 1, STM32_TIM_CH_OUTPWM | STM32_TIM_CH_POLARITY_NEG);
+      STM32_TIM_SETCHANNEL(tim1, 2, STM32_TIM_CH_OUTPWM | STM32_TIM_CH_POLARITY_NEG);
+      STM32_TIM_SETCHANNEL(tim1, 3, STM32_TIM_CH_OUTPWM | STM32_TIM_CH_POLARITY_NEG);
+    }
+
+  p = freqs == 0 ? p1s : p1s / freqs;
+  STM32_TIM_SETPERIOD(tim1, p);
+
+  p = freqs == 0 ? p1s + 1 : p0p5s / freqs;
+
+  STM32_TIM_SETCOMPARE(tim1, 2, (r * p) / 255);
+  STM32_TIM_SETCOMPARE(tim1, 1, (b * p) / 255);
+  STM32_TIM_SETCOMPARE(tim1, 3, (g * p) / 255);
+}
+
+/****************************************************************************
+ * Name: up_ioinit
+ *
+ * Description:
+ *
+ ****************************************************************************/
+
+void up_ioinit(void)
+{
+  /* Configure the GPIO pins as inputs.  NOTE that EXTI interrupts are 
+   * configured for all pins.
+   */
+
+  up_leds(0,0,0,0);
+  stm32_configgpio(GPIO_A0);       /* Probes */
+  stm32_configgpio(GPIO_A1);       /* Probes */
+  stm32_configgpio(GPIO_A2);       /* Smart Config */
+  stm32_configgpio(GPIO_A3);       /* not used */
+  stm32_configgpio(GPIO_BTN_USER); /* Sw 1 */
+  stm32_configgpio(GPIO_D0);       /* USART2 RX*/
+  stm32_configgpio(GPIO_D1);       /* uSART2 TX*/
+  stm32_configgpio(GPIO_D2);       /* Activate */
+}
+
+/****************************************************************************
+ * Name: up_read_inputs
+ *
+ * N.B The return state in true logic, the button polarity is dealt here in
+ *
+ ****************************************************************************/
+
+uint8_t up_read_inputs(void)
+{
+  uint8_t bits = 0;
+  bits |= stm32_gpioread(GPIO_D14) == 0 ? 1 : 0;
+  bits |= stm32_gpioread(GPIO_D15) == 0 ? 2 : 0;
+  bits |= stm32_gpioread(GPIO_A2)  == 0 ? 4 : 0;
+  bits |= stm32_gpioread(GPIO_A3)  == 0 ? 8 : 0;
+  return bits;
+}
+
+/****************************************************************************
+ * Name: up_write_outputs
+ *
+ * N.B The return state in true logic, the button polarity is dealt here in
+ *
+ ****************************************************************************/
+
+void up_write_outputs(int id, bool bits)
+{
+  if (id == 2)
+    {
+      stm32_gpiowrite(GPIO_D2, bits);
+    }
+  else if (id == 0)
+    {
+      stm32_gpiowrite(GPIO_A0, bits);
+    }
+  else if (id == 1)
+    {
+      stm32_gpiowrite(GPIO_A1, bits);
+    }
+}
+
+/****************************************************************************
+ * Name: up_irqio
+ *
+ * Description:
+ *
+ ****************************************************************************/
+
+xcpt_t up_irqio(int id, xcpt_t irqhandler)
+{
+  xcpt_t oldhandler = NULL;
+
+  /* The following should be atomic */
+
+  if (id == 0)
+    {
+      oldhandler = stm32_gpiosetevent(GPIO_D14, true, true, true, irqhandler);
+    }
+  else if (id == 1)
+    {
+      oldhandler = stm32_gpiosetevent(GPIO_D15, true, true, true, irqhandler);
+    }
+
+  return oldhandler;
+}
+#endif /* CONFIG_CC3000_PROBES */
@@ -0,0 +1,153 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/src/stm32_nsh.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <syslog.h>
+#include <errno.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <nuttx/sdio.h>
+#include <nuttx/mmcsd.h>
+
+#include <stm32l4.h>
+#include <stm32l4_uart.h>
+
+#include <arch/board/board.h>
+
+#include "nucleo-l476rg.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_netinitialize
+ *
+ * Description:
+ *   Dummy function expected to start-up logic.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_WL_CC3000
+void up_netinitialize(void)
+{
+}
+#endif
+
+/****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ *   Perform architecture specific initialization
+ *
+ ****************************************************************************/
+
+int board_app_initialize(void)
+{
+#if defined(HAVE_MMCSD) || defined(CONFIG_AJOYSTICK)
+  int ret;
+#endif
+
+  /* Configure CPU load estimation */
+
+#ifdef CONFIG_SCHED_INSTRUMENTATION
+  cpuload_initialize_once();
+#endif
+
+#ifdef HAVE_MMCSD
+  /* First, get an instance of the SDIO interface */
+
+  g_sdio = sdio_initialize(CONFIG_NSH_MMCSDSLOTNO);
+  if (!g_sdio)
+    {
+      syslog(LOG_ERR, "ERROR: Failed to initialize SDIO slot %d\n",
+             CONFIG_NSH_MMCSDSLOTNO);
+      return -ENODEV;
+    }
+
+  /* Now bind the SDIO interface to the MMC/SD driver */
+
+  ret = mmcsd_slotinitialize(CONFIG_NSH_MMCSDMINOR, g_sdio);
+  if (ret != OK)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to bind SDIO to the MMC/SD driver: %d\n",
+             ret);
+      return ret;
+    }
+
+  /* Then let's guess and say that there is a card in the slot. There is no
+   * card detect GPIO.
+   */
+
+  sdio_mediachange(g_sdio, true);
+
+  syslog(LOG_INFO, "[boot] Initialized SDIO\n");
+#endif
+
+#ifdef CONFIG_AJOYSTICK
+  /* Initialize and register the joystick driver */
+
+  ret = board_ajoy_initialize();
+  if (ret != OK)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to register the joystick driver: %d\n",
+             ret);
+      return ret;
+    }
+#endif
+
+  return OK;
+}
@@ -0,0 +1,269 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/src/stm32_spi.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/spi/spi.h>
+#include <arch/board/board.h>
+
+#include <up_arch.h>
+#include <chip.h>
+#include <stm32l4.h>
+
+#include "nucleo-l476rg.h"
+
+#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Enables debug output from this file */
+
+#ifndef CONFIG_DEBUG
+#  undef CONFIG_DEBUG_SPI
+#  undef CONFIG_DEBUG_VERBOSE
+#endif
+
+#ifdef CONFIG_DEBUG_SPI
+#  define spidbg  lldbg
+#  ifdef CONFIG_DEBUG_VERBOSE
+#    define spivdbg lldbg
+#  else
+#    define spivdbg(x...)
+#  endif
+#else
+#  define spidbg(x...)
+#  define spivdbg(x...)
+#endif
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+/* Global driver instances */
+
+#ifdef CONFIG_STM32_SPI1
+struct spi_dev_s *g_spi1;
+#endif
+#ifdef CONFIG_STM32_SPI2
+struct spi_dev_s *g_spi2;
+#endif
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_spiinitialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins for the Nucleo-F401RE and
+ *   Nucleo-F411RE boards.
+ *
+ ************************************************************************************/
+
+void weak_function stm32_spiinitialize(void)
+{
+#ifdef CONFIG_STM32_SPI1
+  /* Configure SPI-based devices */
+
+  g_spi1 = up_spiinitialize(1);
+  if (!g_spi1)
+    {
+      spidbg("[boot] FAILED to initialize SPI port 1\n");
+    }
+
+#ifdef CONFIG_WL_CC3000
+  stm32_configgpio(GPIO_SPI_CS_WIFI);
+#endif
+
+#ifdef HAVE_MMCSD
+  stm32_configgpio(GPIO_SPI_CS_SD_CARD);
+#endif
+#endif
+
+#ifdef CONFIG_STM32_SPI2
+  /* Configure SPI-based devices */
+
+  g_spi2 = up_spiinitialize(2);
+
+  /* Setup CS, EN & IRQ line IOs */
+
+#ifdef CONFIG_WL_CC3000
+  stm32_configgpio(GPIO_WIFI_CS);
+  stm32_configgpio(GPIO_WIFI_EN);
+  stm32_configgpio(GPIO_WIFI_INT);
+#endif
+#endif
+}
+
+/****************************************************************************
+ * Name:  stm32_spi1/2/3select and stm32_spi1/2/3status
+ *
+ * Description:
+ *   The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status must be
+ *   provided by board-specific logic.  They are implementations of the select
+ *   and status methods of the SPI interface defined by struct spi_ops_s (see
+ *   include/nuttx/spi/spi.h). All other methods (including up_spiinitialize())
+ *   are provided by common STM32 logic.  To use this common SPI logic on your
+ *   board:
+ *
+ *   1. Provide logic in stm32_boardinitialize() to configure SPI chip select
+ *      pins.
+ *   2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() functions in your
+ *      board-specific logic.  These functions will perform chip selection and
+ *      status operations using GPIOs in the way your board is configured.
+ *   3. Add a calls to up_spiinitialize() in your low level application
+ *      initialization logic
+ *   4. The handle returned by up_spiinitialize() may then be used to bind the
+ *      SPI driver to higher level logic (e.g., calling
+ *      mmcsd_spislotinitialize(), for example, will bind the SPI driver to
+ *      the SPI MMC/SD driver).
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_STM32_SPI1
+void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
+{
+  spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
+
+#ifdef CONFIG_WL_CC3000
+  if (devid == SPIDEV_WIRELESS)
+    {
+      stm32_gpiowrite(GPIO_SPI_CS_WIFI, !selected);
+    }
+  else
+#endif
+#ifdef HAVE_MMCSD
+  if (devid == SPIDEV_MMCSD)
+    {
+      stm32_gpiowrite(GPIO_SPI_CS_SD_CARD, !selected);
+    }
+#endif
+}
+
+uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  return 0;
+}
+#endif
+
+#ifdef CONFIG_STM32_SPI2
+void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
+{
+  spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
+
+#ifdef CONFIG_WL_CC3000
+  if (devid == SPIDEV_WIRELESS)
+    {
+      stm32_gpiowrite(GPIO_WIFI_CS, !selected);
+    }
+#endif
+}
+
+uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  return 0;
+}
+#endif
+
+#ifdef CONFIG_STM32_SPI3
+void stm32_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
+
+  spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
+}
+
+uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  return 0;
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_spi1cmddata
+ *
+ * Description:
+ *   Set or clear the SH1101A A0 or SD1306 D/C n bit to select data (true)
+ *   or command (false). This function must be provided by platform-specific
+ *   logic. This is an implementation of the cmddata method of the SPI
+ *   interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
+ *
+ * Input Parameters:
+ *
+ *   spi - SPI device that controls the bus the device that requires the CMD/
+ *         DATA selection.
+ *   devid - If there are multiple devices on the bus, this selects which one
+ *         to select cmd or data.  NOTE:  This design restricts, for example,
+ *         one one SPI display per SPI bus.
+ *   cmd - true: select command; false: select data
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SPI_CMDDATA
+#ifdef CONFIG_STM32_SPI1
+int stm32_spi1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+  return OK;
+}
+#endif
+
+#ifdef CONFIG_STM32_SPI2
+int stm32_spi2cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+  return OK;
+}
+#endif
+
+#ifdef CONFIG_STM32_SPI3
+int stm32_spi3cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+  return OK;
+}
+#endif
+#endif /* CONFIG_SPI_CMDDATA */
+
+#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 || CONFIG_STM32_SPI3 */
@@ -0,0 +1,233 @@
+/****************************************************************************
+ * configs/nucleo-l476rg/src/stm32_userleds.c
+ *
+ *   Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+#include <nuttx/power/pm.h>
+
+#include "chip.h"
+#include "up_arch.h"
+#include "up_internal.h"
+#include "stm32l4.h"
+#include "nucleo-l476rg.h"
+
+#ifndef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+#  define leddbg  lldbg
+#  define ledvdbg llvdbg
+#else
+#  define leddbg(x...)
+#  define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/* LED Power Management */
+
+#ifdef CONFIG_PM
+static void led_pm_notify(struct pm_callback_s *cb, enum pm_state_e pmstate);
+static int led_pm_prepare(struct pm_callback_s *cb, enum pm_state_e pmstate);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static struct pm_callback_s g_ledscb =
+{
+  .notify  = led_pm_notify,
+  .prepare = led_pm_prepare,
+};
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: led_pm_notify
+ *
+ * Description:
+ *   Notify the driver of new power state. This callback is called after
+ *   all drivers have had the opportunity to prepare for the new power state.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static void led_pm_notify(struct pm_callback_s *cb , enum pm_state_e pmstate)
+{
+  switch (pmstate)
+    {
+      case(PM_NORMAL):
+        {
+          /* Restore normal LEDs operation */
+
+        }
+        break;
+
+      case(PM_IDLE):
+        {
+          /* Entering IDLE mode - Turn leds off */
+
+        }
+        break;
+
+      case(PM_STANDBY):
+        {
+          /* Entering STANDBY mode - Logic for PM_STANDBY goes here */
+
+        }
+        break;
+
+      case(PM_SLEEP):
+        {
+          /* Entering SLEEP mode - Logic for PM_SLEEP goes here */
+
+        }
+        break;
+
+      default:
+        {
+          /* Should not get here */
+
+        }
+        break;
+    }
+}
+#endif
+
+/****************************************************************************
+ * Name: led_pm_prepare
+ *
+ * Description:
+ *   Request the driver to prepare for a new power state. This is a warning
+ *   that the system is about to enter into a new power state. The driver
+ *   should begin whatever operations that may be required to enter power
+ *   state. The driver may abort the state change mode by returning a
+ *   non-zero value from the callback function.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static int led_pm_prepare(struct pm_callback_s *cb , enum pm_state_e pmstate)
+{
+  /* No preparation to change power modes is required by the LEDs driver.
+   * We always accept the state change by returning OK.
+   */
+
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_userled_initialize
+ ****************************************************************************/
+
+void board_userled_initialize(void)
+{
+  /* Configure LD2 GPIO for output */
+
+  stm32_configgpio(GPIO_LD2);
+}
+
+/****************************************************************************
+ * Name: board_userled
+ ****************************************************************************/
+
+void board_userled(int led, bool ledon)
+{
+  if (led == 1)
+    {
+      stm32_gpiowrite(GPIO_LD2, ldeon);
+    }
+}
+
+/****************************************************************************
+ * Name: board_userled_all
+ ****************************************************************************/
+
+void board_userled_all(uint8_t ledset)
+{
+  if (led == 1)
+    {
+      stm32_gpiowrite(GPIO_LD2, (ledset & BOARD_LD2_BIT) != 0);
+    }
+}
+
+/****************************************************************************
+ * Name: stm32_led_pminitialize
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+void stm32_led_pminitialize(void)
+{
+  /* Register to receive power management callbacks */
+
+  int ret = pm_register(&g_ledscb);
+  DEBUGASSERT(ret == OK);
+  UNUSED(ret);
+}
+#endif /* CONFIG_PM */
+
+#endif /* !CONFIG_ARCH_LEDS */
@@ -0,0 +1,362 @@
+/************************************************************************************
+ * configs/nucleo-l476rg/src/stm32_wireless.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Laurent Latil <laurent@latil.nom.fr>
+ *           David Sidrane <david_s5@nscdg.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/spi/spi.h>
+#include <nuttx/wireless/wireless.h>
+#include <nuttx/wireless/cc3000.h>
+#include <nuttx/wireless/cc3000/include/cc3000_upif.h>
+
+#include "stm32l4.h"
+#include "nucleo-l476rg.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+#ifdef CONFIG_WL_CC3000
+#ifndef CONFIG_WIRELESS
+#  error "Wireless support requires CONFIG_WIRELESS"
+#endif
+
+#ifndef CONFIG_STM32_SPI2
+#  error "CC3000 Wireless support requires CONFIG_STM32_SPI2"
+#endif
+
+#ifndef CC3000_SPI_FREQUENCY
+#  define CC3000_SPI_FREQUENCY 16000000
+#endif
+
+#ifndef CC3000_SPIDEV
+#  define CC3000_SPIDEV 2
+#endif
+
+#if CC3000_SPIDEV != 2
+#  error "CC3000_SPIDEV must be 2"
+#endif
+
+#ifndef CC3000_DEVMINOR
+#  define CC3000_DEVMINOR 0
+#endif
+
+#ifndef CONFIG_CC3000_RX_BUFFER_SIZE
+#define CONFIG_CC3000_RX_BUFFER_SIZE 132
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct stm32_config_s
+{
+  struct cc3000_config_s dev;
+  xcpt_t handler;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/* IRQ/GPIO access callbacks.  These operations all hidden behind callbacks
+ * to isolate the CC3000 driver from differences in GPIO interrupt handling
+ * by varying boards and MCUs.  If possible, interrupts should be configured
+ * on falling edges to detect the Ready Condition At T2: The normal master
+ * SPI write sequence is SPI_CS low, followed by SPI_IRQ low CC3000 to host,
+ * indicating that the CC3000 core module is ready to accept data. T2
+ * duration is approximately 7 ms.
+ *
+ *   irq_attach         - Attach the CC3000 interrupt handler to the GPIO interrupt
+ *   irq_enable         - Enable or disable the GPIO interrupt
+ *   clear_irq          - Acknowledge/clear any pending GPIO interrupt
+ *   power_enable       - Enable or disable Module enable.
+ *   chip_chip_select   - The Chip Select
+ *   wl_read_irq        - Return the state of the interrupt GPIO input
+ */
+
+static int  wl_attach_irq(FAR struct cc3000_config_s *state, xcpt_t handler);
+static void wl_enable_irq(FAR struct cc3000_config_s *state, bool enable);
+static void wl_clear_irq(FAR struct cc3000_config_s *state);
+static void wl_select(FAR struct cc3000_config_s *state, bool enable);
+static void wl_enable_power(FAR struct cc3000_config_s *state, bool enable);
+static bool wl_read_irq(FAR struct cc3000_config_s *state);
+#ifdef CONFIG_CC3000_PROBES
+static bool probe(FAR struct cc3000_config_s *state,int n, bool s);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* A reference to a structure of this type must be passed to the CC3000
+ * driver.  This structure provides information about the configuration
+ * of the CC3000 and provides some board-specific hooks.
+ *
+ * Memory for this structure is provided by the caller.  It is not copied
+ * by the driver and is presumed to persist while the driver is active. The
+ * memory must be writable because, under certain circumstances, the driver
+ * may modify frequency or X plate resistance values.
+ */
+
+static struct stm32_config_s g_cc3000_info =
+{
+  .dev.spi_frequency    = CONFIG_CC3000_SPI_FREQUENCY,
+  .dev.spi_mode         = CONFIG_CC3000_SPI_MODE,
+  .dev.max_rx_size      = 0,
+  .dev.irq_attach       = wl_attach_irq,
+  .dev.irq_enable       = wl_enable_irq,
+  .dev.irq_clear        = wl_clear_irq,
+  .dev.power_enable     = wl_enable_power,
+  .dev.chip_chip_select = wl_select,
+  .dev.irq_read         = wl_read_irq,
+#ifdef CONFIG_CC3000_PROBES
+  .dev.probe            = probe, /* This is used for debugging */
+#endif
+  .handler              = NULL,
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/* IRQ/GPIO access callbacks.  These operations all hidden behind
+ * callbacks to isolate the CC3000 driver from differences in GPIO
+ * interrupt handling by varying boards and MCUs.  If possible,
+ * interrupts should be configured on both rising and falling edges
+ * so that contact and loss-of-contact events can be detected.
+ *
+ * attach  - Attach the CC3000 interrupt handler to the GPIO interrupt
+ * enable  - Enable or disable the GPIO interrupt
+ * clear   - Acknowledge/clear any pending GPIO interrupt
+ * pendown - Return the state of the pen down GPIO input
+ */
+
+static int wl_attach_irq(FAR struct cc3000_config_s *state, xcpt_t handler)
+{
+  FAR struct stm32_config_s *priv = (FAR struct stm32_config_s *)state;
+
+  /* Just save the handler for use when the interrupt is enabled */
+
+  priv->handler = handler;
+  return OK;
+}
+
+static void wl_enable_irq(FAR struct cc3000_config_s *state, bool enable)
+{
+  FAR struct stm32_config_s *priv = (FAR struct stm32_config_s *)state;
+
+  /* The caller should not attempt to enable interrupts if the handler
+   * has not yet been 'attached'
+   */
+
+  DEBUGASSERT(priv->handler || !enable);
+
+  /* Attach and enable, or detach and disable */
+
+  ivdbg("enable:%d\n", enable);
+  if (enable)
+    {
+      (void)stm32_gpiosetevent(GPIO_WIFI_INT, false, true, false, priv->handler);
+    }
+  else
+    {
+      (void)stm32_gpiosetevent(GPIO_WIFI_INT, false, false, false, NULL);
+    }
+}
+
+static void wl_enable_power(FAR struct cc3000_config_s *state, bool enable)
+{
+  ivdbg("enable:%d\n", enable);
+
+  /* Active high enable */
+
+  stm32_gpiowrite(GPIO_WIFI_EN, enable);
+}
+
+static void wl_select(FAR struct cc3000_config_s *state, bool enable)
+{
+  ivdbg("enable:%d\n", enable);
+
+  /* Active high enable */
+
+  stm32_gpiowrite(GPIO_WIFI_CS, enable);
+}
+
+static void wl_clear_irq(FAR struct cc3000_config_s *state)
+{
+  /* Does nothing */
+}
+
+static bool wl_read_irq(FAR struct cc3000_config_s *state)
+{
+  /* Active low*/
+
+  return  stm32_gpioread(GPIO_WIFI_INT) ? false : true;
+}
+
+#ifdef CONFIG_CC3000_PROBES
+static bool probe(FAR struct cc3000_config_s *state,int n, bool s)
+{
+  if (n == 0)
+    {
+      stm32_gpiowrite(GPIO_D14, s);
+    }
+
+  if (n == 1)
+    {
+      stm32_gpiowrite(GPIO_D15, s);
+    }
+
+  return true;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: arch_wlinitialize
+ *
+ * Description:
+ *   Each board that supports a wireless device must provide this function.
+ *   This function is called by application-specific, setup logic to
+ *   configure the wireless device.  This function will register the driver
+ *   as /dev/wirelessN where N is the minor device number.
+ *
+ * Returned Value:
+ *   Zero is returned on success.  Otherwise, a negated errno value is
+ *   returned to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int wireless_archinitialize(size_t max_rx_size)
+{
+  FAR struct spi_dev_s *spi;
+
+  /* Init SPI bus */
+
+  idbg("minor %d\n", minor);
+  DEBUGASSERT(CONFIG_CC3000_DEVMINOR == 0);
+
+#ifdef CONFIG_CC3000_PROBES
+  stm32_configgpio(GPIO_D14);
+  stm32_configgpio(GPIO_D15);
+  stm32_gpiowrite(GPIO_D14, 1);
+  stm32_gpiowrite(GPIO_D15, 1);
+#endif
+
+  /* Get an instance of the SPI interface */
+
+  spi = up_spiinitialize(CONFIG_CC3000_SPIDEV);
+  if (!spi)
+    {
+      idbg("Failed to initialize SPI bus %d\n", CONFIG_CC3000_SPIDEV);
+      return -ENODEV;
+    }
+
+  /* Initialize and register the SPI CC3000 device */
+
+  g_cc3000_info.dev.max_rx_size = max_rx_size ? max_rx_size : CONFIG_CC3000_RX_BUFFER_SIZE;
+  int ret = cc3000_register(spi, &g_cc3000_info.dev, CONFIG_CC3000_DEVMINOR);
+  if (ret < 0)
+    {
+      idbg("Failed to initialize SPI bus %d\n", CONFIG_CC3000_SPIDEV);
+      return -ENODEV;
+    }
+
+  return OK;
+}
+
+/****************************************************************************
+ * Name: C3000_wlan_init
+ *
+ * Description:
+ *   Initialize wlan driver
+ *
+ *   Warning: This function must be called before ANY other wlan driver
+ *   function
+ *
+ * Input Parameters:
+ *   sWlanCB   Asynchronous events callback.
+ *             0 no event call back.
+ *             - Call back parameters:
+ *               1) event_type: HCI_EVNT_WLAN_UNSOL_CONNECT connect event,
+ *                  HCI_EVNT_WLAN_UNSOL_DISCONNECT disconnect event,
+ *                  HCI_EVNT_WLAN_ASYNC_SIMPLE_CONFIG_DONE config done,
+ *                  HCI_EVNT_WLAN_UNSOL_DHCP dhcp report,
+ *                  HCI_EVNT_WLAN_ASYNC_PING_REPORT ping report OR
+ *                  HCI_EVNT_WLAN_KEEPALIVE keepalive.
+ *               2) data: pointer to extra data that received by the event
+ *                  (NULL no data).
+ *               3) length: data length.
+ *              - Events with extra data:
+ *                  HCI_EVNT_WLAN_UNSOL_DHCP: 4 bytes IP, 4 bytes Mask,
+ *                    4 bytes default gateway, 4 bytes DHCP server and 4 bytes
+ *                    for DNS server.
+ *                  HCI_EVNT_WLAN_ASYNC_PING_REPORT: 4 bytes Packets sent,
+ *                    4 bytes Packets received, 4 bytes Min round time,
+ *                    4 bytes Max round time and 4 bytes for Avg round time.
+ *
+ *     sFWPatches  0 no patch or pointer to FW patches
+ *     sDriverPatches  0 no patch or pointer to driver patches
+ *     sBootLoaderPatches  0 no patch or pointer to bootloader patches
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void cc3000_wlan_init(size_t max_tx_len,
+                      tWlanCB sWlanCB,
+                      tFWPatches sFWPatches, tDriverPatches
+                      sDriverPatches,  tBootLoaderPatches sBootLoaderPatches)
+{
+  wlan_init(max_tx_len, sWlanCB, sFWPatches, sDriverPatches, sBootLoaderPatches);
+}
+
+#endif /* CONFIG_WL_CC3000 */