Merged in mlyszczek/nuttx/stm32butterfly2_board (pull request #118)

add stm32butterfly2 development board
2026-06-07 01:05:54 +08:00 · 2016-08-18 11:14:10 -06:00
parent a3e1bdde14 c53c3b1ddc
commit c0074fd6b8
32 changed files with 8963 additions and 1 deletions
@@ -2076,7 +2076,7 @@ config STM32_SPI6
 config STM32_SYSCFG
 	bool "SYSCFG"
 	default y
-	depends on STM32_STM32L15XX || STM32_STM32F30XX || STM32_STM32F37XX || STM32_STM32F207 || STM32_STM32F40XX
+	depends on STM32_STM32L15XX || STM32_STM32F30XX || STM32_STM32F37XX || STM32_STM32F207 || STM32_STM32F40XX || STM32_CONNECTIVITYLINE

 config STM32_TIM1
 	bool "TIM1"
@@ -172,9 +172,13 @@

 #ifndef CONFIG_STM32_VALUELINE
 #  define RCC_CFGR_USBPRE           (1 << 22) /* Bit 22: USB FS prescaler */
+#  define RCC_CFGR_USBPREd0         (0)       /* PLLCLK / 1 */
+#  define RCC_CFGR_USBPREd15        (1)       /* PLLCLK / 1.5 */
 #endif
 #ifdef CONFIG_STM32_CONNECTIVITYLINE
 #  define RCC_CFGR_OTGFSPRE         (1 << 22) /* Bit 22: OTG FS prescaler */
+#  define RCC_CFGR_OTGFSPREd2       (1)       /* PLL_VCO (2x PLLCLK) / 2 */
+#  define RCC_CFGR_OTGFSPREd3       (0)       /* PLL_VCO (3x PLLCLK) / 3 */
 #endif
 #define RCC_CFGR_MCO_SHIFT          (24)      /* Bits 27-24: Microcontroller Clock Output */
 #define RCC_CFGR_MCO_MASK           (15 << RCC_CFGR_MCO_SHIFT)
@@ -936,6 +936,16 @@ config ARCH_BOARD_SPARK
 		(http://www.spark.io).  This board features the STM32103CBT6
 		MCU from STMicro.

+config ARCH_BOARD_STM32_BUTTERFLY2
+        bool "Kamami STM32Butterfly2 development board"
+        depends on ARCH_CHIP_STM32F107VC
+        select ARCH_HAVE_LEDS
+        select ARCH_HAVE_BUTTONS
+        ---help---
+                A configuration for the Kamami STM32Butterfly2 development board
+                based on STM32F107VC micro-controler chip with optional ETH
+                board.
+
 config ARCH_BOARD_STM32_TINY
 	bool "STM32-Tiny board"
 	depends on ARCH_CHIP_STM32F103C8
@@ -1433,6 +1443,7 @@ config ARCH_BOARD
 	default "shenzhou"                 if ARCH_BOARD_SHENZHOU
 	default "skp16c26"                 if ARCH_BOARD_SKP16C26
 	default "spark"                    if ARCH_BOARD_SPARK
+	default "stm32butterfly2"          if ARCH_BOARD_STM32_BUTTERFLY2
 	default "stm32_tiny"               if ARCH_BOARD_STM32_TINY
 	default "stm32f103-minimum"        if ARCH_BOARD_STM32F103_MINIMUM
 	default "stm3210e-eval"            if ARCH_BOARD_STM3210E_EVAL
@@ -1775,6 +1786,9 @@ endif
 if ARCH_BOARD_SPARK
 source "configs/spark/Kconfig"
 endif
+if ARCH_BOARD_STM32_BUTTERFLY2
+source "configs/stm32butterfly2/Kconfig"
+endif
 if ARCH_BOARD_STM32_TINY
 source "configs/stm32_tiny/Kconfig"
 endif
@@ -648,6 +648,9 @@ configs/stm3240g-eval
  microcontroller (ARM Cortex-M4 with FPU).  This port uses a GNU Cortex-M4
  toolchain (such as CodeSourcery).

+configs/stm32butterfly2
+  Kamami stm32butterfly2 development board with optional ETH phy.
+
 configs/stm32f103-minimum
  Generic STM32F103C8T6 Minimum ARM Development Board.

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_STM32_BUTTERFLY2
+endif
@@ -0,0 +1,203 @@
+/*******************************************************************************
+ * configs/stm32butterfly2/include/board.h
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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.
+ *
+ ******************************************************************************/
+
+#ifndef __CONFIGS_STM32_BUTTERFLY2_INCLUDE_BOARD_H
+#define __CONFIGS_STM32_BUTTERFLY2_INCLUDE_BOARD_H 1
+
+/*******************************************************************************
+ * Included Files
+ ******************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifndef __ASSEMBLY__
+# include <stdint.h>
+#endif
+
+#include "stm32_rcc.h"
+
+/*******************************************************************************
+ * Pre-processor Definitions
+ ******************************************************************************/
+
+/* Clocking *******************************************************************/
+
+/* HSI - 8 MHz RC factory-trimmed
+ * LSI - 40 KHz RC (30-60KHz, uncalibrated)
+ * HSE - On-board crystal frequency is 14.7456MHz
+ * LSE - LSE is not connected
+ */
+
+#define STM32_BOARD_XTAL        14745600ul
+
+#define STM32_HSI_FREQUENCY     8000000ul
+#define STM32_LSI_FREQUENCY     40000u
+#define STM32_HSE_FREQUENCY     STM32_BOARD_XTAL
+#define STM32_LSE_FREQUENCY     0
+
+/* PLL output is 71.8848MHz */
+
+#define STM32_PLL_PREDIV2       RCC_CFGR2_PREDIV2d4
+#define STM32_PLL_PLL2MUL       RCC_CFGR2_PLL2MULx12
+#define STM32_PLL_PREDIV1       RCC_CFGR2_PREDIV1d4
+#define STM32_PLL_PLLMUL        RCC_CFGR_PLLMUL_CLKx65
+#define STM32_PLL_FREQUENCY     71884800ul
+
+/* SYSCLK and HCLK adre the PLL frequency */
+
+#define STM32_SYSCLK_FREQUENCY  STM32_PLL_FREQUENCY
+#define STM32_HCLK_FREQUENCY    STM32_PLL_FREQUENCY
+#define STM32_BOARD_HCLK        STM32_HCLK_FREQUENCY
+
+/* USB clock output is 47.9232MHz */
+
+#define STM32_CFGR_OTGFSPRE     RCC_CFGR_OTGFSPREd3
+
+/* APB2 clock (PCLK2) is HCLK */
+
+#define STM32_RCC_CFGR_PPRE2    RCC_CFGR_PPRE2_HCLK
+#define STM32_PCLK2_FREQUENCY   STM32_HCLK_FREQUENCY
+#define STM32_APB2_CLKIN        STM32_PCLK2_FREQUENCY
+
+#define STM32APB_TIM1_CLKIN     STM32_PCLK2_FREQUENCY
+
+/* APB1 clock (PCLK1) is HCLK/2 (35.9424MHz) */
+
+#define STM32_RCC_CFGR_PPRE1    RCC_CFGR_PPRE1_HCLKd2
+#define STM32_PCLK1_FREQUENCY   (STM32_HCLK_FREQUENCY/2)
+
+#define STM32_APB1_TIM2_CLKIN   (2*STM32_PCLK1_FREQUENCY)
+#define STM32_APB1_TIM3_CLKIN   (2*STM32_PCLK1_FREQUENCY)
+#define STM32_APB1_TIM4_CLKIN   (2*STM32_PCLK1_FREQUENCY)
+#define STM32_APB1_TIM5_CLKIN   (2*STM32_PCLK1_FREQUENCY)
+#define STM32_APB1_TIM6_CLKIN   (2*STM32_PCLK1_FREQUENCY)
+#define STM32_APB1_TIM7_CLKIN   (2*STM32_PCLK1_FREQUENCY)
+
+/* LED definitions ************************************************************/
+/* There are four LEDs on stm32butterfly2 board that can be controlled by
+ * software. All pulled high and van be illuminated by driving the output low.
+ *
+ *   LED1 PB0
+ *   LED2 PB1
+ *   LED3 PC4
+ *   LED4 PC5
+ */
+
+/* LED index values for use with board_userled() */
+
+#define BOARD_LED1      0
+#define BOARD_LED2      1
+#define BOARD_LED3      2
+#define BOARD_LED4      3
+#define BOARD_NLEDS     4
+
+/* LED bits for use with board_userled_all() */
+
+#define BOARD_LED1_BIT  (1 << BOARD_LED1)
+#define BOARD_LED2_BIT  (1 << BOARD_LED2)
+#define BOARD_LED3_BIT  (1 << BOARD_LED3)
+#define BOARD_LED4_BIT  (1 << BOARD_LED4)
+
+/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is defined.
+ * In thath case, the usage by the board port is defined in include/board.h and
+ * src/stm32_leds.c. The LEDs are used to encode OS-related events as follows:
+ *
+ *      SYMBOL            Val    Meaning                     LED state
+ *                                                       LED1 LED2 LED3 LED4
+ *      ----------------- ---   -----------------------  ---- ---- ---- ----  */
+#define LED_STARTED       0  /* NuttX has been started   ON   OFF  OFF  OFF   */
+#define LED_HEAPALLOCATE  1  /* Heap has been allocated  OFF  ON   OFF  OFF   */
+#define LED_IRQSENABLED   2  /* Interrupts enabled       OFF  OFF  ON   OFF   */
+#define LED_STACKCREATED  3  /* Idle stack created       OFF  OFF  OFF  ON    */
+#define LED_INIRQ         5  /* In an interrupt          N/C  N/C  N/C  GLOW  */
+#define LED_SIGNAL        6  /* In a signal handler      N/C  N/C  N/C  GLOW  */
+#define LED_ASSERTION     7  /* An assertion failed      N/C  N/C  N/C  GLOW  */
+#define LED_PANIC         8  /* The system has crashed   N/C  N/C  N/C  FLASH */
+#undef  LED_IDLE             /* MCU is is sleep mode         Not used         */
+
+/* After booting, LED1-3 are not longer used by the system and can be used for
+ * other purposes by the application (Of course, all LEDs are available to the
+ * application if CONFIG_ARCH_LEDS is not defined.
+ */
+
+/* ADC configuration. Right now only ADC12_IN10 is supported (potentiometer) */
+
+#ifdef CONFIG_STM32_ADC2
+#  error "CONFIG_STM32_ADC2 is not supported"
+#endif
+
+/* SPI configuration. Only SPI1 is supported */
+
+#ifdef CONFIG_STM32_SPI2
+#  error "CONFIG_STM32_SPI2 is not supported"
+#endif
+
+/*******************************************************************************
+ * Public Data
+ ******************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/*******************************************************************************
+ * Public Function Prototypes
+ ******************************************************************************/
+
+/*******************************************************************************
+ * Name: stm32_boardinitialize
+ *
+ * Description:
+ *     All STM32 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.
+ ******************************************************************************/
+
+EXTERN void stm32_boardinitialize(void);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_STM32_BUTTERFLY2_INCLUDE_BOARD_H */
@@ -0,0 +1,117 @@
+############################################################################
+# configs/viewtool-stm32f107/nsh/Make.defs
+#
+#   Copyright (C) 2013 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 ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+ifeq ($(CONFIG_STM32_DFU),y)
+  LDSCRIPT = dfu.ld
+else
+  LDSCRIPT = flash.ld
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mkwindeps.sh
+  ARCHINCLUDES = -I. -isystem "${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 = $(CROSSDEV)ar rcs
+NM = $(CROSSDEV)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-gotoff.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 +1,78 @@
+#!/bin/bash
+# configs/viewtool-stm32f107/nsh/setenv.sh
+#
+#   Copyright (C) 2013 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="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the RIDE
+# toolchain under windows.  You will also have to edit this if you install
+# the RIDE toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Raisonance/Ride/arm-gcc/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Users/MyName/MentorGraphics/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${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 +1,117 @@
+############################################################################
+# configs/viewtool-stm32f107/nsh/Make.defs
+#
+#   Copyright (C) 2013 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 ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+ifeq ($(CONFIG_STM32_DFU),y)
+  LDSCRIPT = dfu.ld
+else
+  LDSCRIPT = flash.ld
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mkwindeps.sh
+  ARCHINCLUDES = -I. -isystem "${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 = $(CROSSDEV)ar rcs
+NM = $(CROSSDEV)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-gotoff.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 +1,78 @@
+#!/bin/bash
+# configs/viewtool-stm32f107/nsh/setenv.sh
+#
+#   Copyright (C) 2013 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="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the RIDE
+# toolchain under windows.  You will also have to edit this if you install
+# the RIDE toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Raisonance/Ride/arm-gcc/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Users/MyName/MentorGraphics/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${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 +1,117 @@
+############################################################################
+# configs/viewtool-stm32f107/nsh/Make.defs
+#
+#   Copyright (C) 2013 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 ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+ifeq ($(CONFIG_STM32_DFU),y)
+  LDSCRIPT = dfu.ld
+else
+  LDSCRIPT = flash.ld
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mkwindeps.sh
+  ARCHINCLUDES = -I. -isystem "${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 = $(CROSSDEV)ar rcs
+NM = $(CROSSDEV)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-gotoff.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 +1,78 @@
+#!/bin/bash
+# configs/viewtool-stm32f107/nsh/setenv.sh
+#
+#   Copyright (C) 2013 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="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the RIDE
+# toolchain under windows.  You will also have to edit this if you install
+# the RIDE toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Raisonance/Ride/arm-gcc/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Users/MyName/MentorGraphics/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${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 +1,117 @@
+############################################################################
+# configs/viewtool-stm32f107/nsh/Make.defs
+#
+#   Copyright (C) 2013 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 ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs
+
+ifeq ($(CONFIG_STM32_DFU),y)
+  LDSCRIPT = dfu.ld
+else
+  LDSCRIPT = flash.ld
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/copydir.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mkwindeps.sh
+  ARCHINCLUDES = -I. -isystem "${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 = $(CROSSDEV)ar rcs
+NM = $(CROSSDEV)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-gotoff.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 +1,78 @@
+#!/bin/bash
+# configs/viewtool-stm32f107/nsh/setenv.sh
+#
+#   Copyright (C) 2013 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="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the RIDE
+# toolchain under windows.  You will also have to edit this if you install
+# the RIDE toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Raisonance/Ride/arm-gcc/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Users/MyName/MentorGraphics/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${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 +1,116 @@
+/****************************************************************************
+ * configs/viewtool-stm32f107/scripts/dfu.ld
+ *
+ *   Copyright (C) 2013 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.
+ *
+ ****************************************************************************/
+
+MEMORY
+{
+    flash (rx) : ORIGIN = 0x08003000, LENGTH = 208K
+    sram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+}
+
+OUTPUT_ARCH(arm)
+EXTERN(_vectors)
+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 RAM vector table (if present) should lie at the beginning of SRAM */
+
+	.ram_vectors : {
+		*(.ram_vectors)
+	} > sram
+
+	.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 +1,116 @@
+/****************************************************************************
+ * configs/viewtool-stm32f107/scripts/flash.ld
+ *
+ *   Copyright (C) 2013 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.
+ *
+ ****************************************************************************/
+
+MEMORY
+{
+	flash (rx) : ORIGIN = 0x08000000, LENGTH = 256K
+	sram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+}
+
+OUTPUT_ARCH(arm)
+EXTERN(_vectors)
+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 RAM vector table (if present) should lie at the beginning of SRAM */
+
+	.ram_vectors : {
+		*(.ram_vectors)
+	} > sram
+
+	.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 +1,68 @@
+############################################################################
+# configs/stm32butterfly2/src/Makefile
+#
+#   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+#   Author: Michał Łyszczek <michal.lyszczek@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.
+############################################################################
+
+-include $(TOPDIR)/Make.defs
+
+ASRCS =
+CSRCS = stm32_boot.c stm32_leds.c
+
+ifeq ($(CONFIG_STM32_ADC),y)
+CSRCS += stm32_adc.c
+endif
+
+ifeq ($(CONFIG_STM32_SPI1),y)
+CSRCS += stm32_spi.c
+endif
+
+ifeq ($(CONFIG_STM32_OTGFS),y)
+CSRCS += stm32_usb.c
+endif
+
+ifeq ($(CONFIG_USBHOST),y)
+CSRCS += stm32_usbhost.c
+endif
+
+ifeq ($(CONFIG_USBDEV),y)
+CSRCS += stm32_usbdev.c
+endif
+
+ifeq ($(CONFIG_MMCSD),y)
+CSRCS += stm32_mmcsd.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += stm32_buttons.c
+endif
+
+include $(TOPDIR)/configs/Board.mk
@@ -0,0 +1,86 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_adc.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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 <chip.h>
+#include <debug.h>
+#include <errno.h>
+
+#include "stm32_adc.h"
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: board_adc_setup
+ *
+ * Description:
+ *   Function initializes channel 1 of adc1 and registers device as /dev/adc0
+ ****************************************************************************/
+
+int board_adc_setup(void)
+{
+  static bool initialized = false;
+  uint8_t channel[1] = {10};
+  struct adc_dev_s *adc;
+  int rv;
+
+  if (initialized)
+    {
+      return OK;
+    }
+
+  ainfo("INFO: Initializing ADC12_IN10\n");
+  stm32_configgpio(GPIO_ADC12_IN10);
+  if ((adc = stm32_adcinitialize(1, channel, 1)) == NULL)
+    {
+      aerr("ERROR: Failed to get adc interface\n");
+      return -ENODEV;
+    }
+
+  if ((rv = adc_register("/dev/adc0", adc)) < 0)
+    {
+      aerr("ERROR: adc_register failed: %d\n", rv);
+      return rv;
+    }
+
+  initialized = true;
+  ainfo("INFO: ADC12_IN10 initialized succesfully\n");
+  return OK;
+}
+
@@ -0,0 +1,95 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/boot.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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 <arch/board/board.h>
+#include <syslog.h>
+
+#include "stm32_butterfly2.h"
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_boardinitialize
+ *
+ * Description:
+ *   Initializes low level pins for the drivers.
+ ****************************************************************************/
+
+void stm32_boardinitialize(void)
+{
+  stm32_led_initialize();
+  stm32_spidev_initialize();
+  stm32_usb_initialize();
+}
+
+/*****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ *   Initializes upper half drivers with board specific settings
+ *
+ * Returned value:
+ *   0 on sucess or errno value of failed init function.
+ ****************************************************************************/
+
+int board_app_initialize(uintptr_t arg)
+{
+  int rv = 0;
+
+#ifdef CONFIG_MMCSD
+  if ((rv = stm32_mmcsd_initialize(CONFIG_NSH_MMCSDMINOR)) < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize SD slot %d: %d\n");
+      return rv;
+    }
+#endif
+
+#ifdef CONFIG_USBHOST
+  if ((rv = stm32_usbhost_initialize()) < 0)
+    {
+      syslog(LOG_ERR, "ERROR: Failed to initialize USB host: %d\n", rv);
+      return rv;
+    }
+#endif
+
+  return rv;
+}
+
@@ -0,0 +1,131 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_butterfly2.h
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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.
+ ****************************************************************************/
+
+#ifndef __CONFIGS_STM32_BUTTERFLY2_SRC_STM32_BUTTERFLY2_H
+#define __CONFIGS_STM32_BUTTERFLY2_SRC_STM32_BUTTERFLY2_H 1
+
+/*****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include "stm32_gpio.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* SD Card pins */
+
+#define GPIO_SD_CS      (GPIO_OUTPUT | GPIO_CNF_OUTPP | GPIO_MODE_50MHz |\
+                         GPIO_OUTPUT_SET | GPIO_PORTA | GPIO_PIN4)
+#define GPIO_SD_CD      (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_EXTI |\
+                         GPIO_PORTB | GPIO_PIN9)
+
+/* USB pins */
+
+#define GPIO_OTGFS_PWRON (GPIO_OUTPUT | GPIO_CNF_OUTPP | GPIO_MODE_50MHz |\
+                          GPIO_OUTPUT_SET | GPIO_PORTD | GPIO_PIN15)
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_led_initialize
+ *
+ * Description:
+ *      Initializes low level gpio pins for board LEDS
+ ****************************************************************************/
+
+void stm32_led_initialize(void);
+
+/*****************************************************************************
+ * Name: stm32_spidev_initialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins.
+ *
+ * Note:
+ *   Here only CS pins are configured as SPI pins are configured by driver
+ *   itself.
+ ****************************************************************************/
+
+#ifdef CONFIG_STM32_SPI1
+void stm32_spidev_initialize(void);
+#else
+static inline void stm32_spidev_initialize(void) {}
+#endif
+
+/*****************************************************************************
+ * Name: stm32_mmcsd_initialize
+ *
+ * Description:
+ *   Initializes SPI-based SD card
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_MMCSD
+int stm32_mmcsd_initialize(int minor);
+#else
+static inline int stm32_mmcsd_initialize(int minor) { (void)minor; return 0; }
+#endif
+
+/*****************************************************************************
+ * Name: stm32_usb_initialize
+ *
+ * Description:
+ *   Initializes USB pins
+ ****************************************************************************/
+
+#ifdef CONFIG_STM32_OTGFS
+void stm32_usb_initialize(void);
+#else
+static inline void stm32_usb_initialize(void) {}
+#endif
+
+/*****************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Initializes USB host functionality.
+ ****************************************************************************/
+
+#ifdef CONFIG_USBHOST
+int stm32_usbhost_initialize(void);
+#else
+static inline int stm32_usbhost_initialize(void) { return 0; }
+#endif
+
+#endif // __CONFIGS_STM32_BUTTERFLY2_SRC_STM32_BUTTERFLY2_H
+
@@ -0,0 +1,107 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_buttons.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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.
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Public Includes
+ ****************************************************************************/
+
+#include "stm32_gpio.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NUM_BUTTONS 5
+
+#define GPIO_JOY_O (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN7)
+#define GPIO_JOY_U (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN8)
+#define GPIO_JOY_D (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN9)
+#define GPIO_JOY_R (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN10)
+#define GPIO_JOY_L (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN11)
+
+/*****************************************************************************
+ * Private Declarations
+ ****************************************************************************/
+
+static const uint32_t buttons[NUM_BUTTONS] = {
+  GPIO_JOY_O, GPIO_JOY_U, GPIO_JOY_D, GPIO_JOY_R, GPIO_JOY_L };
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *      Initializes gpio pins for joystick buttons
+ ****************************************************************************/
+
+void board_button_initialize(void)
+{
+  int i;
+  for (i = 0; i != NUM_BUTTONS; ++i)
+    {
+      stm32_configgpio(buttons[i]);
+    }
+}
+
+/*****************************************************************************
+ * Name: board_buttons
+ *
+ * Description:
+ *      Reads keys
+ ****************************************************************************/
+
+uint8_t board_buttons(void)
+{
+  uint8_t rv = 0;
+  int i;
+
+  for (i = 0; i != NUM_BUTTONS; ++i)
+    {
+      if (stm32_gpioread(buttons[i]) == 0)
+        {
+          rv |= 1 << i;
+        }
+    }
+
+  return rv;
+}
+
@@ -0,0 +1,264 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_leds.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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 <arch/board/board.h>
+#include <nuttx/board.h>
+#include <nuttx/config.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "stm32_gpio.h"
+
+/*****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#define GPIO_LED1       (GPIO_OUTPUT | GPIO_CNF_OUTPP | GPIO_MODE_50MHz |\
+                         GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN0)
+#define GPIO_LED2       (GPIO_OUTPUT | GPIO_CNF_OUTPP | GPIO_MODE_50MHz |\
+                         GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN1)
+#define GPIO_LED3       (GPIO_OUTPUT | GPIO_CNF_OUTPP | GPIO_MODE_50MHz |\
+                         GPIO_OUTPUT_SET | GPIO_PORTC | GPIO_PIN4)
+#define GPIO_LED4       (GPIO_OUTPUT | GPIO_CNF_OUTPP | GPIO_MODE_50MHz |\
+                         GPIO_OUTPUT_SET | GPIO_PORTC | GPIO_PIN5)
+
+/*****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/* Identifies led state */
+enum led_state
+{
+  LED_ON = false,
+  LED_OFF = true
+};
+
+/*****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: led_state
+ *
+ * Description:
+ *   Sets pack of leds to given state
+ ****************************************************************************/
+
+static void led_state(enum led_state state, unsigned int leds)
+{
+  if (leds & BOARD_LED1_BIT)
+    {
+      stm32_gpiowrite(GPIO_LED1, state);
+    }
+
+  if (leds & BOARD_LED2_BIT)
+    {
+      stm32_gpiowrite(GPIO_LED2, state);
+    }
+
+  if (leds & BOARD_LED3_BIT)
+    {
+      stm32_gpiowrite(GPIO_LED3, state);
+    }
+
+  if (leds & BOARD_LED4_BIT)
+    {
+      stm32_gpiowrite(GPIO_LED4, state);
+    }
+}
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_led_initialize
+ *
+ * Description:
+ *   Initializes low level gpio pins for board LEDS
+ ****************************************************************************/
+
+void stm32_led_initialize(void)
+{
+  stm32_configgpio(GPIO_LED1);
+  stm32_configgpio(GPIO_LED2);
+  stm32_configgpio(GPIO_LED3);
+  stm32_configgpio(GPIO_LED4);
+}
+
+#ifdef CONFIG_ARCH_LEDS
+
+/*****************************************************************************
+ * Name: board_autoled_on
+ *
+ * Description:
+ *   Drives board leds when specific RTOS state led occurs.
+ *
+ * Input parameters:
+ *   led - This is actually an RTOS state not led number of anything like that
+ ****************************************************************************/
+
+void board_autoled_on(int led)
+{
+  switch (led)
+    {
+    case LED_STARTED:
+      led_state(LED_OFF, BOARD_LED2_BIT | BOARD_LED3_BIT | BOARD_LED4_BIT);
+      led_state(LED_ON,  BOARD_LED1_BIT);
+      break;
+
+    case LED_HEAPALLOCATE:
+      led_state(LED_OFF, BOARD_LED1_BIT | BOARD_LED3_BIT | BOARD_LED4_BIT);
+      led_state(LED_ON,  BOARD_LED2_BIT);
+      break;
+
+    case LED_IRQSENABLED:
+      led_state(LED_OFF, BOARD_LED1_BIT | BOARD_LED2_BIT | BOARD_LED4_BIT);
+      led_state(LED_ON,  BOARD_LED3_BIT);
+      break;
+
+    case LED_STACKCREATED:
+      led_state(LED_OFF, BOARD_LED1_BIT | BOARD_LED2_BIT | BOARD_LED3_BIT);
+      led_state(LED_ON,  BOARD_LED4_BIT);
+      break;
+
+    case LED_INIRQ:
+    case LED_SIGNAL:
+    case LED_ASSERTION:
+    case LED_PANIC:
+      led_state(LED_ON,  BOARD_LED4_BIT);
+      break;
+    }
+}
+
+/*****************************************************************************
+ * Name: board_autoled_off
+ *
+ * Description:
+ *   Drives board leds when specific RTOS state led ends
+ *
+ * Input parameters:
+ *   led - This is actually an RTOS state not led number of anything like that
+ ****************************************************************************/
+
+void board_autoled_off(int led)
+{
+  switch (led)
+    {
+    case LED_STARTED:
+      led_state(LED_OFF, BOARD_LED1_BIT);
+      break;
+
+    case LED_HEAPALLOCATE:
+      led_state(LED_OFF, BOARD_LED2_BIT);
+      break;
+
+    case LED_IRQSENABLED:
+      led_state(LED_OFF, BOARD_LED3_BIT);
+      break;
+
+    case LED_STACKCREATED:
+    case LED_INIRQ:
+    case LED_SIGNAL:
+    case LED_ASSERTION:
+    case LED_PANIC:
+      led_state(LED_OFF,  BOARD_LED4_BIT);
+      break;
+    }
+}
+#endif
+
+/*****************************************************************************
+ * Name: board_userled_initialize
+ *
+ * Description:
+ *   This function should initialize leds for user use, but on RTOS start we
+ *   initialize every led for use by RTOS and at end, when RTOS is fully
+ *   booted up, we give control of these specific leds for user. So that's why
+ *   this function is empty.
+ ****************************************************************************/
+
+void board_userled_initialize(void)
+{
+  /* Already initialized by stm32_led_initialize. */
+}
+
+/*****************************************************************************
+ * Name: board_userled
+ *
+ * Description:
+ *   Sets led to ledon state.
+ *
+ * Input parameters:
+ *   led - Led to be set, indexed from 0
+ *   ledon - new state for the led.
+ ****************************************************************************/
+
+void board_userled(int led, bool ledon)
+{
+#ifndef CONFIG_ARCH_LEDS
+  if (led == BOARD_LED4)
+    {
+      return;
+    }
+#endif
+  unsigned int ledbit = 1 << led;
+  led_state(ledon, ledbit);
+}
+
+/*****************************************************************************
+ * Name: board_userled_all
+ *
+ * Description:
+ *   Sets whole ledset to given state.
+ *
+ * Input parameters:
+ *   ledset - Led bits to be set on or off
+ ****************************************************************************/
+
+void board_userled_all(uint8_t ledset)
+{
+#ifdef CONFIG_ARCH_LEDS
+  led_state(LED_ON, ledset & ~BOARD_LED4_BIT);
+  led_state(LED_OFF, ~(ledset | BOARD_LED4_BIT));
+#else
+  led_state(LED_ON, ledset);
+  led_state(led_OFF, ~ledset);
+#endif
+}
+
@@ -0,0 +1,217 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_mmcsd.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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 <debug.h>
+#include <nuttx/config.h>
+#include <nuttx/mmcsd.h>
+#include <nuttx/spi/spi.h>
+#include <pthread.h>
+#include <sched.h>
+#include <semaphore.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "stm32.h"
+#include "stm32_butterfly2.h"
+#include "stm32_spi.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_STM32_SPI1
+#  error "SD driver requires CONFIG_STM32_SPI1 to be enabled"
+#endif
+
+#ifdef CONFIG_DISABLE_MOUNTPOINT
+#  error "SD driver requires CONFIG_DISABLE_MOUNTPOINT to be disabled"
+#endif
+
+/*****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+static const int SD_SPI_PORT = 1; /* SD is connected to SPI1 port */
+static const int SD_SLOT_NO = 0;  /* There is only one SD slot */
+
+/* Media changed callback */
+
+static spi_mediachange_t g_chmediaclbk;
+
+/* Argument for media changed callback */
+
+static void *g_chmediaarg;
+
+/* Semafor to inform stm32_cd_thread that card was inserted or pulled out */
+
+static sem_t g_cdsem;
+
+/*****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_cd_thread
+ *
+ * Description:
+ *   Working thread to call mediachanged function when card is inserted or
+ *   pulled out.
+ ****************************************************************************/
+
+static void *stm32_cd_thread(void *arg)
+{
+  (void)arg;
+
+  spiinfo("INFO: Runnig card detect thread\n");
+  while (1)
+    {
+      sem_wait(&g_cdsem);
+      spiinfo("INFO: Card has been inserted, initializing\n");
+
+      if (g_chmediaclbk)
+        {
+          /* Card doesn't seem to initialize properly without letting it to
+           * rest for a millsecond or so.
+           */
+
+          usleep(1 * 1000);
+          g_chmediaclbk(g_chmediaarg);
+        }
+    }
+
+  return NULL;
+}
+
+/*****************************************************************************
+ * Name: stm32_cd
+ *
+ * Description:
+ *   Card detect interrupt handler.
+ ****************************************************************************/
+
+static int stm32_cd(int irq, void *context)
+{
+  static const int debounce_time = 100; /* [ms] */
+  static uint32_t now = 0;
+  static uint32_t prev = 0;
+  struct timespec tp;
+
+  clock_gettime(CLOCK_MONOTONIC, &tp);
+  now = tp.tv_sec * 1000 + tp.tv_nsec / 1000000;
+
+  /* When inserting card, card detect plate might bounce causing this
+   * interrupt to be called many time on single card insert/deinsert. Thus we
+   * are allowing only one interrupt every 100ms.
+   */
+
+  if (now - debounce_time > prev)
+    {
+      prev = now;
+      sem_post(&g_cdsem);
+    }
+
+  return OK;
+}
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_spi1register
+ *
+ * Description:
+ *   Registers media change callback
+ ****************************************************************************/
+
+int stm32_spi1register(struct spi_dev_s *dev, spi_mediachange_t callback,
+                       void *arg)
+{
+  spiinfo("INFO: Registering spi1 device\n");
+  g_chmediaclbk = callback;
+  g_chmediaarg = arg;
+  return OK;
+}
+
+/*****************************************************************************
+ * Name: stm32_mmcsd_initialize
+ *
+ * Description:
+ *   Initialize SPI-based SD card and card detect thread.
+ ****************************************************************************/
+
+int stm32_mmcsd_initialize(int minor)
+{
+  struct spi_dev_s *spi;
+  struct sched_param schparam;
+  pthread_attr_t pattr;
+  int rv;
+
+  spiinfo("INFO: Initializing mmcsd card\n");
+  if ((spi = stm32_spibus_initialize(SD_SPI_PORT)) == NULL)
+    {
+      ferr("failed to initialize SPI port %d\n", SD_SPI_PORT);
+      return -ENODEV;
+    }
+
+  if ((rv = mmcsd_spislotinitialize(minor, SD_SLOT_NO, spi)) < 0)
+    {
+      ferr("failed to bind SPI port %d to SD slot %d\n", SD_SPI_PORT,
+           SD_SLOT_NO);
+      return rv;
+    }
+
+  stm32_gpiosetevent(GPIO_SD_CD, true, true, true, stm32_cd);
+
+  sem_init(&g_cdsem, 0, 0);
+  pthread_attr_init(&pattr);
+
+#ifdef CONFIG_DEBUG_FS
+  pthread_attr_setstacksize(&pattr, 1024);
+#else
+  pthread_attr_setstacksize(&pattr, 256);
+#endif
+
+  schparam.sched_priority = 50;
+  pthread_attr_setschedparam(&pattr, &schparam);
+  pthread_create(NULL, &pattr, stm32_cd_thread, NULL);
+
+  spiinfo("INFO: mmcsd card has been initialized successfully\n");
+  return OK;
+}
+
@@ -0,0 +1,105 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_spi.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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 <debug.h>
+#include <nuttx/spi/spi.h>
+
+#include "stm32_butterfly2.h"
+#include "stm32_gpio.h"
+#include "stm32_spi.h"
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_spidev_initialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins.
+ *
+ * Note:
+ *   Here only CS pins are configured as SPI pins are configured by driver
+ *   itself.
+ ****************************************************************************/
+
+void stm32_spidev_initialize(void)
+{
+  spiinfo("INFO: Initializing spi gpio pins\n");
+  stm32_configgpio(GPIO_SD_CS);
+  stm32_configgpio(GPIO_SD_CD);
+}
+
+/*****************************************************************************
+ * Name: stm32_spi1select
+ *
+ * Description:
+ *   Function asserts given devid based on select
+ ****************************************************************************/
+
+void stm32_spi1select(struct spi_dev_s *dev, enum spi_dev_e devid,
+                      bool select)
+{
+  spiinfo("INFO: Selecting spi dev: %d, state: %d\n", devid, select);
+  if (devid == SPIDEV_MMCSD)
+    {
+      stm32_gpiowrite(GPIO_SD_CS, !select);
+    }
+}
+
+/*****************************************************************************
+ * Name: stm32_spi1status
+ *
+ * Description:
+ *   Return status of devid
+ ****************************************************************************/
+
+uint8_t stm32_spi1status(struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  spiinfo("INFO: Requesting info from spi dev: %d\n", devid);
+  if (devid == SPIDEV_MMCSD)
+    {
+      if (stm32_gpioread(GPIO_SD_CD) == 0)
+        {
+          return SPI_STATUS_PRESENT;
+        }
+    }
+
+    return 0;
+}
+
@@ -0,0 +1,62 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_usb.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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.
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Include Files
+ ****************************************************************************/
+
+#include <debug.h>
+
+#include "stm32_gpio.h"
+
+#include "stm32_butterfly2.h"
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_usb_initialize
+ *
+ * Description:
+ *   Initializes USB pins
+ ****************************************************************************/
+
+void stm32_usb_initialize(void)
+{
+  uinfo("INFO: Initializing usb otgfs gpio pins\n");
+  stm32_configgpio(GPIO_OTGFS_VBUS);
+  stm32_configgpio(GPIO_OTGFS_PWRON);
+}
+
@@ -0,0 +1,78 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_usbdev.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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 <debug.h>
+#include <stdbool.h>
+#include <sys/boardctl.h>
+
+#include "stm32_otgfs.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_STM32_OTGFS
+#  error "CONFIG_USBDEV requires CONFIG_STM32_OTGFS to be enabled"
+#endif
+
+#ifdef CONFIG_USBHOST
+#  error "CONFIG_USBDEV cannot be set alongside CONFIG_USBHOST"
+#endif
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_usbsuspend
+ *
+ * Description:
+ *   Board logic must provide the stm32_usbsuspend logic if the USBDEV driver
+ *   is used. This function is called whenever the USB enters or leaves
+ *   suspend mode. This is an oportunity for the board logic to shutdown
+ *   clocks, power, etc. while the USB is suspended.
+ *
+ * TODO:
+ *   - Well... implement those features like clock shutdown.
+ ****************************************************************************/
+
+void stm32_usbsuspend(struct usbdev_s *dev, bool resume)
+{
+  uinfo("INFO: usb %s", resume ? "resumed" : "suspended");
+}
+
@@ -0,0 +1,195 @@
+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_usbhost.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@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.
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Include Files
+ ****************************************************************************/
+
+#include <debug.h>
+#include <errno.h>
+#include <nuttx/config.h>
+#include <nuttx/usb/usbhost.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "stm32.h"
+#include "stm32_butterfly2.h"
+#include "stm32_otgfs.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_STM32_OTGFS
+#  error "CONFIG_USBHOST requires CONFIG_STM32_OTGFS to be enabled"
+#endif
+
+#ifdef CONFIG_USBDEV
+#  error "CONFIG_USBHOST cannot be set alongside CONFIG_USBDEV"
+#endif
+
+/*****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct usbhost_connection_s *g_usbconn;
+
+/*****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: usbhost_detect
+ *
+ * Description:
+ *   Wait for USB devices to be connected.
+ ****************************************************************************/
+
+static void* usbhost_detect(void *arg)
+{
+  (void)arg;
+  struct usbhost_hubport_s *hport;
+
+  uinfo("INFO: Starting usb detect thread\n");
+  for (;;)
+    {
+      CONN_WAIT(g_usbconn, &hport);
+
+      if (hport->connected)
+        {
+          CONN_ENUMERATE(g_usbconn, hport);
+        }
+    }
+
+  return 0;
+}
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Initializes USB host functionality.
+ ****************************************************************************/
+
+int stm32_usbhost_initialize(void)
+{
+  int rv;
+
+#ifdef CONFIG_USBHOST_MSC
+  uinfo("INFO: Initializing USB MSC class\n");
+  if ((rv = usbhost_msc_initialize()) < 0)
+    {
+      uerr("ERROR: Failed to register mass storage class: %d\n", rv);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_CDACM
+  uinfo("INFO: Initializing CDCACM usb class\n");
+  if ((rv = usbhost_cdacm_initialize()) < 0)
+    {
+      uerr("ERROR: Failed to register CDC/ACM serial class: %d\n", rv);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_HIDKBD
+  uinfo("INFO: Initializing HID Keyboard usb class\n");
+  if ((rv = usbhost_kbdinit()) < 0)
+    {
+      uerr("ERROR: Failed to register the KBD class: %d\n", rv);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_HIDMOUSE
+  uinfo("INFO: Initializing HID Mouse usb class\n");
+  if ((rv = usbhost_mouse_init()) < 0)
+    {
+      uerr("ERROR: Failed to register the mouse class: %d\n", rv);
+    }
+#endif
+
+#ifdef CONFIG_USBHOST_HUB
+  uinfo("INFO: Initializing USB HUB class\n");
+  if ((rv = usbhost_hub_initialize()) < 0)
+    {
+      uerr("ERROR: Failed to register hub class: %d\n", rv);
+    }
+#endif
+
+  if ((g_usbconn = stm32_otgfshost_initialize(0)))
+    {
+      pthread_attr_t pattr;
+      struct sched_param schparam;
+
+      pthread_attr_init(&pattr);
+      pthread_attr_setstacksize(&pattr, 2048);
+
+      schparam.sched_priority = 50;
+      pthread_attr_setschedparam(&pattr, &schparam);
+
+      return pthread_create(NULL, &pattr, usbhost_detect, NULL);
+    }
+
+  return -ENODEV;
+}
+
+/*****************************************************************************
+ * Name: stm32_usbhost_vbusdrive
+ *
+ * Description:
+ *   Enable/disable driving of VBUS 5V output.
+ *
+ *   The application uses this field to control power to this port, and the
+ *   core clears this bit on an overcurrent condition.
+ *
+ * Input Parameters:
+ *   iface - For future growth to handle multiple USB host interface.
+ *     Should be zero.
+ *   enable - true: enable VBUS power; false: disable VBUS power
+ *
+ * Returned Value:
+ *   None
+ ****************************************************************************/
+
+void stm32_usbhost_vbusdrive(int iface, bool enable)
+{
+  stm32_gpiowrite(GPIO_OTGFS_PWRON, enable);
+}
+