Diff: gpio_api.h

Revision:

0:8024c367e29f

Child:

2:e9a661555b58

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gpio_api.h	Fri Oct 05 09:16:41 2012 +0000
@@ -0,0 +1,50 @@
+/* mbed Microcontroller Library - gpio_api
+ * Copyright (c) 2009-2011 ARM Limited. All rights reserved.
+ */ 
+ 
+#ifndef MBED_GPIO_API_H
+#define MBED_GPIO_API_H
+
+#include "PinNames.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
+typedef enum {
+    PIN_INPUT,
+    PIN_OUTPUT
+} PinDirection;
+
+/* This version of the gpio API caches the gpio register pointer and the pin mask */
+typedef struct {
+    PinName             pin;
+    uint32_t            mask;
+    
+    __IO uint32_t *reg_dir;
+    __IO uint32_t *reg_set;
+    __IO uint32_t *reg_clr;
+    __I  uint32_t *reg_in;
+} gpio_object;
+
+void gpio_init (gpio_object *obj, PinName pin, PinDirection direction);
+
+void gpio_mode(gpio_object *obj, PinMode mode);
+void gpio_dir (gpio_object *obj, PinDirection direction);
+
+static inline void gpio_write(gpio_object *obj, int value) {
+    if (value)
+        *obj->reg_set = obj->mask;
+    else
+        *obj->reg_clr = obj->mask;
+}
+
+static inline int gpio_read(gpio_object *obj) {
+    return ((*obj->reg_in & obj->mask) ? 1 : 0);
+}
+
+#ifdef __cplusplus
+}
+#endif 
+
+#endif