Add skeleton of GPIO control logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2513 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 209 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/sam3u/sam3u_pio.c b/nuttx/arch/arm/src/sam3u/sam3u_pio.c
new file mode 100755
index 000000000..6c40c1dcd
--- /dev/null
+++ b/nuttx/arch/arm/src/sam3u/sam3u_pio.c
@@ -0,0 +1,209 @@
+/****************************************************************************
+ * arch/arm/src/sam3u/sam3u_pio.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 <time.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <arch/board/board.h>
+
+#include "up_internal.h"
+#include "up_arch.h"
+
+#include "chip.h"
+#include "sam3u_internal.h"
+#include "sam3u_pio.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/************************************************************************************
+ * Name: sam3u_configinput
+ *
+ * Description:
+ *   Configure a GPIO input pin based on bit-encoded description of the pin.
+ *
+ ************************************************************************************/
+
+static inline int sam3u_configinput(uint16_t cfgset)
+{
+#warning "Not implemented"
+return -ENOSYS;
+}
+
+/************************************************************************************
+ * Name: sam3u_configoutput
+ *
+ * Description:
+ *   Configure a GPIO output pin based on bit-encoded description of the pin.
+ *
+ ************************************************************************************/
+
+static inline int sam3u_configoutput(uint16_t cfgset)
+{
+#warning "Not implemented"
+return -ENOSYS;
+}
+
+/************************************************************************************
+ * Name: sam3u_configperipha
+ *
+ * Description:
+ *   Configure a GPIO pin driven by a peripheral A signal based on bit-encoded
+ *   description of the pin.
+ *
+ ************************************************************************************/
+
+static inline int sam3u_configperipha(uint16_t cfgset)
+{
+#warning "Not implemented"
+return -ENOSYS;
+}
+
+/************************************************************************************
+ * Name: sam3u_configperipha
+ *
+ * Description:
+ *   Configure a GPIO pin driven by a peripheral A signal based on bit-encoded
+ *   description of the pin.
+ *
+ ************************************************************************************/
+
+static inline int sam3u_configperiphb(uint16_t cfgset)
+{
+#warning "Not implemented"
+return -ENOSYS;
+}
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/************************************************************************************
+ * Name: sam3u_configgpio
+ *
+ * Description:
+ *   Configure a GPIO pin based on bit-encoded description of the pin.
+ *
+ ************************************************************************************/
+
+int sam3u_configgpio(uint16_t cfgset)
+{
+  int ret;
+
+  switch (cfgset & GPIO_MODE_MASK)
+    {    
+      case GPIO_INPUT:
+        ret = sam3u_configinput(cfgset);
+        break;
+    
+      case GPIO_OUTPUT:
+        ret = sam3u_configoutput(cfgset);
+        break;
+    
+      case GPIO_PERIPHA:
+        ret = sam3u_configperipha(cfgset);
+        break;
+   
+      case GPIO_PERIPHB:
+        ret = sam3u_configperiphb(cfgset);
+        break;
+    
+      default:
+        ret = -EINVAL;
+        break;
+    }
+  return ret;
+}
+
+/************************************************************************************
+ * Name: sam3u_gpiowrite
+ *
+ * Description:
+ *   Write one or zero to the selected GPIO pin
+ *
+ ************************************************************************************/
+
+void sam3u_gpiowrite(uint16_t pinset, bool value)
+{
+#warning "Not implemented"
+}
+
+/************************************************************************************
+ * Name: sam3u_gpioread
+ *
+ * Description:
+ *   Read one or zero from the selected GPIO pin
+ *
+ ************************************************************************************/
+
+bool sam3u_gpioread(uint16_t pinset)
+{
+#warning "Not implemented"
+return false;
+}
+
+/************************************************************************************
+ * Function:  sam3u_dumpgpio
+ *
+ * Description:
+ *   Dump all GPIO registers associated with the port of the provided pin description.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_DEBUG
+int sam3u_dumpgpio(uint16_t pinset, const char *msg)
+{
+#warning "Not implemented"
+return -ENOSYS;
+}
+#endif