Add skeleton of GPIO utilities

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2999 42af7a65-404d-4744-a932-0658087f49c3

3 files changed, 245 insertions, 7 deletions

diff --git a/nuttx/arch/avr/src/at91uc3/Make.defs b/nuttx/arch/avr/src/at91uc3/Make.defs
index 59f1fce29..58c425866 100755
--- a/nuttx/arch/avr/src/at91uc3/Make.defs
+++ b/nuttx/arch/avr/src/at91uc3/Make.defs
@@ -51,8 +51,8 @@ CMN_CSRCS	= up_assert.c up_allocateheap.c up_blocktask.c up_copystate.c \
 # Required AT91UC3 files
 
 CHIP_ASRCS	=
-CHIP_CSRCS	= at91uc3_clkinit.c at91uc3_irq.c at91uc3_lowconsole.c \
-		  at91uc3_lowinit.c at91uc3_serial.c
+CHIP_CSRCS	= at91uc3_clkinit.c at91uc3_gpio.c at91uc3_irq.c \
+		  at91uc3_lowconsole.c at91uc3_lowinit.c at91uc3_serial.c
 
 # Configuration-dependent AT91UC3 files
 
diff --git a/nuttx/arch/avr/src/at91uc3/at91uc3_gpio.c b/nuttx/arch/avr/src/at91uc3/at91uc3_gpio.c
new file mode 100644
index 000000000..a2a98a98d
--- /dev/null
+++ b/nuttx/arch/avr/src/at91uc3/at91uc3_gpio.c
@@ -0,0 +1,115 @@
+/**************************************************************************
+ * arch/avr/src/at91uc3/at91uc3_gpio.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 <errno.h>
+
+#include "at91uc3_config.h"
+#include "up_internal.h"
+#include "at91uc3_internal.h"
+
+/**************************************************************************
+ * Private Definitions
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Types
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Function Prototypes
+ **************************************************************************/
+
+/**************************************************************************
+ * Global Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Public Functions
+ **************************************************************************/
+
+/************************************************************************************
+ * Name: at91uc3_configgpio
+ *
+ * Description:
+ *   Configure a GPIO pin based on bit-encoded description of the pin.
+ *
+ ************************************************************************************/
+
+int at91uc3_configgpio(uint32_t cfgset)
+{
+#warning "Not Implemented"
+  return -ENOSYS;
+}
+
+/************************************************************************************
+ * Name: at91uc3_gpiowrite
+ *
+ * Description:
+ *   Write one or zero to the selected GPIO pin
+ *
+ ************************************************************************************/
+
+void at91uc3_gpiowrite(uint32_t pinset, bool value)
+{
+#warning "Not Implemented"
+}
+
+/************************************************************************************
+ * Name: at91uc3_gpioread
+ *
+ * Description:
+ *   Read one or zero from the selected GPIO pin
+ *
+ ************************************************************************************/
+
+bool at91uc3_gpioread(uint32_t pinset)
+{
+#warning "Not Implemented"
+  return false;
+}
diff --git a/nuttx/arch/avr/src/at91uc3/at91uc3_internal.h b/nuttx/arch/avr/src/at91uc3/at91uc3_internal.h
index 23cfc6632..c68c9044d 100755
--- a/nuttx/arch/avr/src/at91uc3/at91uc3_internal.h
+++ b/nuttx/arch/avr/src/at91uc3/at91uc3_internal.h
@@ -49,16 +49,103 @@
  * Pre-processor Definitions
  ************************************************************************************/
 
+/* Bit-encoded input to at91uc3_configgpio() ****************************************/
+
+/* 32-bit Encoding:
+ * xxxx xxxx xxxx xxxF MMIU VXXG PPPB BBBB
+ */
+
+/* Glitch Filter Enable:
+ * .... .... .... ...F .... .... .... ....
+ */
+
+ #define GPIO_GLITCH               (1 << 16) /* Bit 16: Glitch filter enable */
+
+/* Interrupt modes (valid only if GPIO_INTR==1)
+ * .... .... .... .... MM.. .... .... ....
+ */
+
+#define GPIO_INTMODE_SHIFT         (14)      /* Bits 14-15: Interrupt mode */
+#define GPIO_INTMODE_MASK          (3 << GPIO_INTMODE_SHIFT)
+#  define GPIO_INTMODE_BOTH        (0 << GPIO_INTMODE_SHIFT)
+#  define GPIO_INTMODE_RISING      (1 << GPIO_INTMODE_SHIFT)
+#  define GPIO_INTMODE_FALLING     (2 << GPIO_INTMODE_SHIFT)
+
+/* Interrupt enable
+ * .... .... .... .... ..I. .... .... ....
+ */
+
+#define GPIO_INTR                  (1 << 13) /* Bit 13: Interrupt enable */
+
+/* Pull-up enable
+ * .... .... .... .... ...U .... .... ....
+ */
+
+#define GPIO_PULLUP                (1 << 12) /* Bit 12: Pull-up enable */
+
+/* Output value (Valid only if GPIO_ENABLE==1 and GPIO_OUTPUT==1)
+ * .... .... .... .... .... V... .... ....
+ */
+
+#define GPIO_VALUE                 (1 << 11) /* Bit 11: Output value */
+
+/* Peripheral MUX setting (valid only if GPIO_PERIPH)
+ * .... .... .... .... .... .XX. .... ....
+ */
+
+#define GPIO_MUX_SHIFT             (9)       /* Bits 9-10: Peripheral MUX */
+#define GPIO_MUX_MASK              (3 << GPIO_MUX_SHIFT)
+#  define GPIO_MUX_0               (0 << GPIO_MUX_SHIFT) /* PMR0=0 PMR1=0 */
+#  define GPIO_MUX_1               (1 << GPIO_MUX_SHIFT) /* PMR0=1 PMR1=0 */
+#  define GPIO_MUX_2               (2 << GPIO_MUX_SHIFT) /* PMR0=0 PMR1=1 */
+#  define GPIO_MUX_3               (3 << GPIO_MUX_SHIFT) /* PMR0=1 PMR1=1 */
+
+/* GPIO Enable (1) or Peripheral Enable (0)
+ * .... .... .... .... .... ...G .... ....
+ */
+
+#define GPIO_ENABLE                (1 << 8)  /* Bit 8:  GPIO enable */
+#define GPIO_PERIPH                (0)
+
+
+/* Port Number
+ * .... .... .... .... .... .... PPP. ....
+ */
+
+#define GPIO_PORT_SHIFT            (5)       /* Bits 5-7: Port number */
+#define GPIO_PORT_MASK             (7 << GPIO_PORT_SHIFT)
+
+/* Pin number:
+ * .... .... .... .... .... .... ...B BBBB
+ */
+
+#define GPIO_PIN_SHIFT             (0)       /* Bits 0-4: Port number */
+#define GPIO_PIN_MASK              (0x1f << GPIO_PIN_SHIFT)
+
 /************************************************************************************
  * Public Types
  ************************************************************************************/
 
+#ifndef __ASSEMBLY__
+
+/************************************************************************************
+ * Inline Functions
+ ************************************************************************************/
+
 /************************************************************************************
  * Public Data
  ************************************************************************************/
 
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
 /************************************************************************************
- * Public Functions
+ * Public Function Prototypes
  ************************************************************************************/
 
 /************************************************************************************
@@ -69,7 +156,7 @@
  *
  ************************************************************************************/
 
-extern void up_clkinitialize(void);
+EXTERN void up_clkinitialize(void);
 
 /******************************************************************************
  * Name: usart_reset
@@ -79,7 +166,7 @@ extern void up_clkinitialize(void);
  *
  ******************************************************************************/
 
-extern void usart_reset(uintptr_t usart_base);
+EXTERN void usart_reset(uintptr_t usart_base);
 
 /******************************************************************************
  * Name: usart_configure
@@ -102,7 +189,7 @@ void usart_configure(uintptr_t usart_base, uint32_t baud, unsigned int parity,
  *
  ************************************************************************************/
 
-extern void up_consoleinit(void);
+EXTERN void up_consoleinit(void);
 
 /************************************************************************************
  * Name: up_boardinit
@@ -113,7 +200,43 @@ extern void up_consoleinit(void);
  *
  ************************************************************************************/
 
-extern void up_boardinitialize(void);
+EXTERN void up_boardinitialize(void);
+
+/************************************************************************************
+ * Name: at91uc3_configgpio
+ *
+ * Description:
+ *   Configure a GPIO pin based on bit-encoded description of the pin.
+ *
+ ************************************************************************************/
+
+EXTERN int at91uc3_configgpio(uint32_t cfgset);
+
+/************************************************************************************
+ * Name: at91uc3_gpiowrite
+ *
+ * Description:
+ *   Write one or zero to the selected GPIO pin
+ *
+ ************************************************************************************/
+
+EXTERN void at91uc3_gpiowrite(uint32_t pinset, bool value);
+
+/************************************************************************************
+ * Name: at91uc3_gpioread
+ *
+ * Description:
+ *   Read one or zero from the selected GPIO pin
+ *
+ ************************************************************************************/
+
+EXTERN bool at91uc3_gpioread(uint32_t pinset);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
 
+#endif /* __ASSEMBLY__ */
 #endif /* __ARCH_AVR_SRC_AVR32_AT91UC3_INTERNAL_H */