Add button support

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3029 42af7a65-404d-4744-a932-0658087f49c3

configs/avr32dev1/include/board.h

@@ -87,6 +87,12 @@
 #define LED_ASSERTION        2  /* ON   ON   ON   OFF  */
 #define LED_PANIC            2  /* ON   ON   ON   OFF  */
 
+/* Button definitions ***************************************************************/
+/* The AVR32DEV1 board has 3 BUTTONs, two of which can be sensed through GPIO pins. */
+
+#define BUTTON1                    1 /* Bit 0: Button 1 */
+#define BUTTON2                    2 /* Bit 1: Button 2 */
+
 /************************************************************************************
  * Public Types
  ************************************************************************************/
@@ -120,6 +126,49 @@ extern "C" {
 
 EXTERN void avr32_boardinitialize(void);
 
+/************************************************************************************
+ * Name: up_buttoninit
+ *
+ * Description:
+ *   up_buttoninit() must be called to initialize button resources.  After that,
+ *   up_buttons() may be called to collect the state of all buttons.  up_buttons()
+ *   returns an 8-bit bit set with each bit associated with a button.  See the
+ *   BUTTON* definitions above for the meaning of each bit in the returned value.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_ARCH_BUTTONS
+EXTERN void up_buttoninit(void);
+
+/************************************************************************************
+ * Name: up_buttons
+ *
+ * Description:
+ *   After up_buttoninit() has been called, up_buttons() may be called to collect
+ *   the state of all buttons.  up_buttons() returns an 8-bit bit set with each bit
+ *   associated with a button.  See the BUTTON* definitions above for the meaning of
+ *   each bit in the returned value.
+ *
+ ************************************************************************************/
+
+EXTERN uint8_t up_buttons(void);
+
+/************************************************************************************
+ * Name: up_irqbutton1/2
+ *
+ * Description:
+ *   These functions may be called to register an interrupt handler that will be
+ *   called when BUTTON1/2 is depressed.  The previous interrupt handler value is
+ *   returned (so that it may restored, if so desired).
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_GPIOB_IRQ
+EXTERN xcpt_t up_irqbutton1(xcpt_t irqhandler);
+EXTERN xcpt_t up_irqbutton2(xcpt_t irqhandler);
+#endif
+#endif /* CONFIG_ARCH_BUTTONS */
+
 #undef EXTERN
 #if defined(__cplusplus)
 }

configs/avr32dev1/src/Makefile

@@ -38,7 +38,13 @@
 CFLAGS		+= -I$(TOPDIR)/sched
 
 ASRCS		= 
-CSRCS		= up_boot.c up_leds.c
+CSRCS		= up_boot.c
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS		+= up_leds.c
+endif
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS		+= up_buttons.c
+endif
 
 AOBJS		= $(ASRCS:.S=$(OBJEXT))
 COBJS		= $(CSRCS:.c=$(OBJEXT))

configs/avr32dev1/src/avr32dev1_internal.h

@@ -60,16 +60,16 @@
 #define PINMUX_GPIO_LED1 (GPIO_ENABLE | GPIO_OUTPUT | GPIO_LOW | GPIO_PORTA | 7)
 #define PINMUX_GPIO_LED2 (GPIO_ENABLE | GPIO_OUTPUT | GPIO_LOW | GPIO_PORTA | 8)
 
-/* KEYs
+/* BUTTONs
  *
- * The AVR32DEV1 board has 3 KEYs, two of which can be sensed through GPIO pins.
+ * The AVR32DEV1 board has 3 BUTTONs, two of which can be sensed through GPIO pins.
  *
  * PIN 24  PB2  KEY1
  * PIN 25  PB3  KEY2
  */
 
-#define PINMUX_GPIO_KEY1 (GPIO_ENABLE | GPIO_INPUT | GPIO_PORTB | 2)
+#define PINMUX_GPIO_BUTTON1 (GPIO_ENABLE | GPIO_INPUT | GPIO_PORTB | 2)
-#define PINMUX_GPIO_KEY2 (GPIO_ENABLE | GPIO_INPUT | GPIO_PORTB | 3)
+#define PINMUX_GPIO_BUTTON2 (GPIO_ENABLE | GPIO_INPUT | GPIO_PORTB | 3)
 
 /************************************************************************************
  * Public Types

configs/avr32dev1/src/up_buttons.c

@@ -0,0 +1,159 @@
+/****************************************************************************
+ * configs/sam3u-ek/src/up_leds.c
+ *
+ *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/irq.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "at91uc3_internal.h"
+#include "avr32dev1_internal.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static xcpt_t g_irqbutton1;
+static xcpt_t g_irqbutton2;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_buttoninit
+ ****************************************************************************/
+
+void up_buttoninit(void)
+{
+  (void)at91uc3_configgpio(PINMUX_GPIO_BUTTON1);
+  (void)at91uc3_configgpio(PINMUX_GPIO_BUTTON2);
+}
+
+/****************************************************************************
+ * Name: up_buttons
+ ****************************************************************************/
+
+uint8_t up_buttons(void)
+{
+  uint8_t retval;
+
+  retval  = at91uc3_gpioread(PINMUX_GPIO_BUTTON1) ? 0 : BUTTON1;
+  retval |= sat91uc3_gpioread(PINMUX_GPIO_BUTTON2) ? 0 : BUTTON2;
+
+  return retval;
+}
+
+/****************************************************************************
+ * Name: up_irqbutton1
+ ****************************************************************************/
+
+#ifdef CONFIG_GPIOB_IRQ
+xcpt_t up_irqbutton1(xcpt_t irqhandler)
+{
+  xcpt_t oldhandler;
+  irqstate_t flags;
+
+  /* Disable interrupts until we are done */
+
+  flags        = irqsave();
+
+  /* Get the old button interrupt handler and save the new one */
+
+  oldhandler   = g_irqbutton1;
+  g_irqbutton1 = irqhandler;
+
+  /* Configure and enable the interrupt */
+
+#warning "Missing Logic"
+
+  irqrestore(flags);
+
+  /* Return the old button handler (so that it can be restored) */
+
+  return oldhandler;
+}
+#endif
+
+/****************************************************************************
+ * Name: up_irqbutton2
+ ****************************************************************************/
+
+#ifdef CONFIG_GPIOB_IRQ
+xcpt_t up_irqbutton2(xcpt_t irqhandler)
+{
+  xcpt_t oldhandler;
+  irqstate_t flags;
+
+  /* Disable interrupts until we are done */
+
+  flags        = irqsave();
+
+  /* Get the old button interrupt handler and save the new one */
+
+  oldhandler   = g_irqbutton2;
+  g_irqbutton2 = irqhandler;
+
+  /* Configure and enable the interrupt */
+
+#warning "Missing Logic"
+
+  irqrestore(flags);
+
+  /* Return the old button handler (so that it can be restored) */
+
+  return oldhandler;
+}
+#endif
+
+#endif /* CONFIG_ARCH_BUTTONS */