Diff: mbed-dev/targets/TARGET_Atmel/TARGET_SAM_CortexM4/gpio_api.c

Revision:

18:6a4db94011d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev/targets/TARGET_Atmel/TARGET_SAM_CortexM4/gpio_api.c	Sun May 14 23:18:57 2017 +0000
@@ -0,0 +1,77 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2015 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 "mbed_assert.h"
+#include "PinNames.h"
+#include "gpio_object.h"
+#include "gpio_api.h"
+#include "compiler.h"
+#include "ioport.h"
+
+extern uint8_t g_sys_init;
+
+uint32_t gpio_set(PinName pin)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+    return (1UL << (pin % 32));
+}
+
+void gpio_init(gpio_t *obj, PinName pin)
+{
+    MBED_ASSERT(pin != (PinName)NC);
+    if (g_sys_init == 0) {
+        sysclk_init();
+        system_board_init();
+        g_sys_init = 1;
+    }
+    obj->pin = pin;
+
+    ioport_set_pin_dir(pin, IOPORT_DIR_INPUT);
+    ioport_set_pin_mode(pin, IOPORT_MODE_PULLUP);
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode)
+{
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    obj->mode = mode;
+    switch (mode) {
+        case PullNone :
+            ioport_set_pin_mode(obj->pin, IOPORT_MODE_OPEN_DRAIN);
+            break;
+        case PullUp:
+            ioport_set_pin_mode(obj->pin, IOPORT_MODE_PULLUP);
+            break;
+        case PullDown:
+            ioport_set_pin_mode(obj->pin, IOPORT_MODE_PULLDOWN);
+            break;
+    }
+}
+
+void gpio_dir(gpio_t *obj, PinDirection direction)
+{
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    obj->direction = direction;
+    switch (direction) {
+        case PIN_INPUT :
+            ioport_set_pin_dir(obj->pin, IOPORT_DIR_INPUT);
+            break;
+        case PIN_OUTPUT:
+            ioport_set_pin_dir(obj->pin, IOPORT_DIR_OUTPUT);
+            break;
+        case PIN_INPUT_OUTPUT:
+            ioport_set_pin_dir(obj->pin, IOPORT_DIR_OUTPUT);
+            break;
+    }
+}