From 8b2391b33f7c59dfb599bb99dbe6156493196888 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Tue, 12 Oct 2010 01:30:27 +0000
Subject: [PATCH] Add skeleton of GPIO utilities
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2999 42af7a65-404d-4744-a932-0658087f49c3
---
arch/avr/src/at91uc3/Make.defs | 4 +-
arch/avr/src/at91uc3/at91uc3_gpio.c | 115 ++++++++++++++++++++
arch/avr/src/at91uc3/at91uc3_internal.h | 133 +++++++++++++++++++++++-
3 files changed, 245 insertions(+), 7 deletions(-)
create mode 100644 arch/avr/src/at91uc3/at91uc3_gpio.c
diff --git a/arch/avr/src/at91uc3/Make.defs b/arch/avr/src/at91uc3/Make.defs
index 59f1fce298..58c4258667 100755
--- a/arch/avr/src/at91uc3/Make.defs
+++ b/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/arch/avr/src/at91uc3/at91uc3_gpio.c b/arch/avr/src/at91uc3/at91uc3_gpio.c
new file mode 100644
index 0000000000..a2a98a98d0
--- /dev/null
+++ b/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/arch/avr/src/at91uc3/at91uc3_internal.h b/arch/avr/src/at91uc3/at91uc3_internal.h
index 23cfc6632c..c68c9044da 100755
--- a/arch/avr/src/at91uc3/at91uc3_internal.h
+++ b/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 */
--
GitLab