Diff: common/gpio.c

Revision:

1:71204b8406f2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/gpio.c	Fri Jul 24 21:01:44 2015 +1000
@@ -0,0 +1,61 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "gpio_api.h"
+
+static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
+{
+    gpio_init(gpio, pin);
+    if (pin != NC) {
+        gpio_dir(gpio, PIN_INPUT);
+        gpio_mode(gpio, mode);
+    }
+}
+
+static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
+{
+    gpio_init(gpio, pin);
+    if (pin != NC) {
+        gpio_write(gpio, value);
+        gpio_dir(gpio, PIN_OUTPUT);
+        gpio_mode(gpio, mode);
+    }
+}
+
+void gpio_init_in(gpio_t* gpio, PinName pin) {
+    gpio_init_in_ex(gpio, pin, PullDefault);
+}
+
+void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
+    _gpio_init_in(gpio, pin, mode);
+}
+
+void gpio_init_out(gpio_t* gpio, PinName pin) {
+    gpio_init_out_ex(gpio, pin, 0);
+}
+
+void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
+    _gpio_init_out(gpio, pin, PullNone, value);
+}
+
+void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
+    if (direction == PIN_INPUT) {
+        _gpio_init_in(gpio, pin, mode);
+        if (pin != NC)
+            gpio_write(gpio, value); // we prepare the value in case it is switched later
+    } else {
+        _gpio_init_out(gpio, pin, mode, value);
+    }
+}