Add button logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3030 42af7a65-404d-4744-a932-0658087f49c3

configs/avr32dev1/README.txt

@@ -157,6 +157,10 @@ AVR32DEV1 Configuration Options
 
   Individual subsystems can be enabled:
   
+	CONFIG_AVR32_GPIOIRQ - GPIO interrupt support
+	CONFIG_AVR32_GPIOIRQSETA - Set of GPIOs on PORTA that support interrupts
+	CONFIG_AVR32_GPIOIRQSETB - Set of GPIOs on PORTB that support interrupts
+
 	CONFIG_AVR32_USARTn - Enable support for USARTn
 	CONFIG_AVR32_USARTn_RS232 - Configure USARTn as an RS232 interface.
 	CONFIG_AVR32_USARTn_SPI - Configure USARTn as an SPI interface.

configs/avr32dev1/include/board.h

@@ -43,6 +43,9 @@
 
 #include <nuttx/config.h>
 
+#include <stdint.h>
+#include <nuttx/irq.h>
+
 /************************************************************************************
  * Definitions
  ************************************************************************************/
@@ -135,6 +138,10 @@ EXTERN void avr32_boardinitialize(void);
  *   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.
  *
+ * NOTE: Nothing in the "base" NuttX code calls up_buttoninit().  If you want button
+ * support in an application, your application startup code must call up_buttoninit()
+ * prior to calling any of the other button interfaces.
+ *
  ************************************************************************************/
 
 #ifdef CONFIG_ARCH_BUTTONS
@@ -161,9 +168,15 @@ EXTERN uint8_t up_buttons(void);
  *   called when BUTTON1/2 is depressed.  The previous interrupt handler value is
  *   returned (so that it may restored, if so desired).
  *
+ * Configuration Notes:
+ *   Configuration CONFIG_AVR32_GPIOIRQ must be selected to enable the overall GPIO
+ *   IRQ feature and CONFIG_AVR32_GPIOIRQSETA and/or CONFIG_AVR32_GPIOIRQSETB must
+ *   be enabled to select GPIOs to support interrupts on.  For button support, bits
+ *   2 and 3 must be set in CONFIG_AVR32_GPIOIRQSETB (PB2 and PB3).
+ *
  ************************************************************************************/
 
-#ifdef CONFIG_GPIOB_IRQ
+#ifdef CONFIG_AVR32_GPIOIRQ
 EXTERN xcpt_t up_irqbutton1(xcpt_t irqhandler);
 EXTERN xcpt_t up_irqbutton2(xcpt_t irqhandler);
 #endif

configs/avr32dev1/ostest/defconfig

@@ -89,7 +89,7 @@ CONFIG_ARCH_INTERRUPTSTACK=n
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARCH_BOOTLOADER=n
 CONFIG_ARCH_LEDS=y
-CONFIG_ARCH_BUTTONS=n
+CONFIG_ARCH_BUTTONS=y
 CONFIG_ARCH_CALIBRATION=n
 CONFIG_ARCH_DMA=n
 
@@ -103,6 +103,10 @@ CONFIG_AVR32_AVRTOOLSL=n
 #
 # Individual subsystems can be enabled:
 #
+# CONFIG_AVR32_GPIOIRQ - GPIO interrupt support
+# CONFIG_AVR32_GPIOIRQSETA - Set of GPIOs on PORTA that support interrupts
+# CONFIG_AVR32_GPIOIRQSETB - Set of GPIOs on PORTB that support interrupts
+#
 # CONFIG_AVR32_USARTn - Enable support for USARTn
 # CONFIG_AVR32_USARTn_RS232 - Configure USARTn as an RS232 interface.
 # CONFIG_AVR32_USARTn_SPI - Configure USARTn as an SPI interface.
@@ -113,6 +117,10 @@ CONFIG_AVR32_AVRTOOLSL=n
 # CONFIG_AVR32_USARTn_ISO786 - Configure USARTn as an ISO786 interface.
 #
 
+CONFIG_AVR32_GPIOIRQ=y
+CONFIG_AVR32_GPIOIRQSETA=0
+CONFIG_AVR32_GPIOIRQSETB=0x0000000c
+
 CONFIG_AVR32_USART0=n
 CONFIG_AVR32_USART0_RS232=n
 CONFIG_AVR32_USART0_SPI=n

configs/avr32dev1/src/avr32dev1_internal.h

@@ -43,11 +43,22 @@
 
 #include <nuttx/config.h>
 #include <nuttx/compiler.h>
+#include "at91uc3_config.h"
 
 /************************************************************************************
  * Definitions
  ************************************************************************************/
 
+/* Configuration ********************************************************************/
+
+#if (CONFIG_AVR32_GPIOIRQSETB & 4) == 1
+#  define CONFIG_AVR32DEV_BUTTON1_IRQ 1
+#endif 
+
+#if (CONFIG_AVR32_GPIOIRQSETB & 8) == 1
+#  define CONFIG_AVR32DEV_BUTTON2_IRQ 1
+#endif 
+
 /* AVRDEV1 GPIO Pin Definitions *****************************************************/
 /* LEDs
  * 
@@ -68,8 +79,23 @@
  * PIN 25  PB3  KEY2
  */
 
-#define PINMUX_GPIO_BUTTON1 (GPIO_ENABLE | GPIO_INPUT | GPIO_PORTB | 2)
+#if CONFIG_AVR32DEV_BUTTON1_IRQ
-#define PINMUX_GPIO_BUTTON2 (GPIO_ENABLE | GPIO_INPUT | GPIO_PORTB | 3)
+#  define PINMUX_GPIO_BUTTON1 (GPIO_ENABLE | GPIO_INPUT | GPIO_INTR | \
+                               GPIO_INTMODE_BOTH | GPIO_GLITCH | GPIO_PORTB | 2)
+#  define GPIO_BUTTON1_IRQ    AVR32_IRQ_GPIO_PB2
+#else
+#  define PINMUX_GPIO_BUTTON1 (GPIO_ENABLE | GPIO_INPUT | GPIO_GLITCH | \
+                               GPIO_PORTB | 2)
+#endif
+
+#if CONFIG_AVR32DEV_BUTTON2_IRQ
+#  define PINMUX_GPIO_BUTTON2 (GPIO_ENABLE | GPIO_INPUT | GPIO_INTR | \
+                               GPIO_INTMODE_BOTH | GPIO_GLITCH | GPIO_PORTB | 3)
+#  define GPIO_BUTTON2_IRQ    AVR32_IRQ_GPIO_PB3
+#else
+#  define PINMUX_GPIO_BUTTON2 (GPIO_ENABLE | GPIO_INPUT | GPIO_GLITCH | \
+                               GPIO_PORTB | 3)
+#endif
 
 /************************************************************************************
  * Public Types

configs/avr32dev1/src/up_buttons.c

@@ -38,7 +38,9 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
+#include "at91uc3_config.h"
 
+#include <sys/types.h>
 #include <stdint.h>
 
 #include <nuttx/irq.h>
@@ -59,9 +61,6 @@
  * Private Data
  ****************************************************************************/
 
-static xcpt_t g_irqbutton1;
-static xcpt_t g_irqbutton2;
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -89,7 +88,7 @@ uint8_t up_buttons(void)
   uint8_t retval;
 
   retval  = at91uc3_gpioread(PINMUX_GPIO_BUTTON1) ? 0 : BUTTON1;
-  retval |= sat91uc3_gpioread(PINMUX_GPIO_BUTTON2) ? 0 : BUTTON2;
+  retval |= at91uc3_gpioread(PINMUX_GPIO_BUTTON2) ? 0 : BUTTON2;
 
   return retval;
 }
@@ -98,30 +97,33 @@ uint8_t up_buttons(void)
  * Name: up_irqbutton1
  ****************************************************************************/
 
-#ifdef CONFIG_GPIOB_IRQ
+#ifdef CONFIG_AVR32_GPIOIRQ
 xcpt_t up_irqbutton1(xcpt_t irqhandler)
 {
+#ifdef CONFIG_AVR32DEV_BUTTON1_IRQ
   xcpt_t oldhandler;
-  irqstate_t flags;
 
-  /* Disable interrupts until we are done */
+  /* Attach the handler */
 
-  flags        = irqsave();
+  gpio_irqattach(GPIO_BUTTON1_IRQ, irqhandler, &oldhandler);
 
-  /* Get the old button interrupt handler and save the new one */
+  /* Enable/disable the interrupt */
 
-  oldhandler   = g_irqbutton1;
+  if (irqhandler)
-  g_irqbutton1 = irqhandler;
+    {
-
+	  gpio_irqenable(GPIO_BUTTON1_IRQ);
-  /* Configure and enable the interrupt */
+	}
-
+  else
-#warning "Missing Logic"
+    {
-
+	  gpio_irqdisable(GPIO_BUTTON1_IRQ);
-  irqrestore(flags);
+	}
 
   /* Return the old button handler (so that it can be restored) */
 
   return oldhandler;
+#else
+  return NULL;
+#endif
 }
 #endif
 
@@ -129,30 +131,33 @@ xcpt_t up_irqbutton1(xcpt_t irqhandler)
  * Name: up_irqbutton2
  ****************************************************************************/
 
-#ifdef CONFIG_GPIOB_IRQ
+#ifdef CONFIG_AVR32_GPIOIRQ
 xcpt_t up_irqbutton2(xcpt_t irqhandler)
 {
+#ifdef CONFIG_AVR32DEV_BUTTON2_IRQ
   xcpt_t oldhandler;
-  irqstate_t flags;
 
-  /* Disable interrupts until we are done */
+  /* Attach the handler */
 
-  flags        = irqsave();
+  gpio_irqattach(GPIO_BUTTON2_IRQ, irqhandler, &oldhandler);
 
-  /* Get the old button interrupt handler and save the new one */
+  /* Enable/disable the interrupt */
 
-  oldhandler   = g_irqbutton2;
+  if (irqhandler)
-  g_irqbutton2 = irqhandler;
+    {
-
+	  gpio_irqenable(GPIO_BUTTON2_IRQ);
-  /* Configure and enable the interrupt */
+	}
-
+  else
-#warning "Missing Logic"
+    {
-
+	  gpio_irqdisable(GPIO_BUTTON2_IRQ);
-  irqrestore(flags);
+	}
 
   /* Return the old button handler (so that it can be restored) */
 
   return oldhandler;
+#else
+  return NULL;
+#endif
 }
 #endif