Diff: targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/gpio_api.c

Revision:

15:a81a8d6c1dfe

Child:

64:41a834223ea3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/gpio_api.c	Wed Nov 04 16:30:11 2015 +0000
@@ -0,0 +1,94 @@
+/* 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 "port.h"
+
+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);
+    struct port_config pin_conf;
+    PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(pin);
+
+    obj->pin = pin;
+    if (pin == (PinName)NC)
+        return;
+
+    obj->mask = gpio_set(pin);
+    port_get_config_defaults(&pin_conf);
+    obj->powersave = pin_conf.powersave;
+    obj->direction = PORT_PIN_DIR_INPUT;
+    obj->mode = PORT_PIN_PULL_UP;
+    port_pin_set_config(pin, &pin_conf);
+
+    obj->OUTCLR = &port_base->OUTCLR.reg;
+    obj->OUTSET = &port_base->OUTSET.reg;
+    obj->IN = &port_base->IN.reg;
+    obj->OUT = &port_base->OUT.reg;
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode)
+{
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    struct port_config pin_conf;
+
+    obj->mode = mode;
+    pin_conf.direction = obj->direction;
+    pin_conf.powersave  = obj->powersave;
+    switch (mode) {
+        case PullNone :
+            pin_conf.input_pull  = PORT_PIN_PULL_NONE;
+            break;
+        case PullUp:
+            pin_conf.input_pull  = PORT_PIN_PULL_UP;
+            break;
+        case PullDown:
+            pin_conf.input_pull  = PORT_PIN_PULL_DOWN;
+            break;
+    }
+    port_pin_set_config(obj->pin, &pin_conf);
+}
+
+void gpio_dir(gpio_t *obj, PinDirection direction)
+{
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    struct port_config pin_conf;
+
+    obj->direction = direction;
+    pin_conf.input_pull = obj->mode;
+    pin_conf.powersave  = obj->powersave;
+    switch (direction) {
+        case PIN_INPUT :
+            pin_conf.direction  = PORT_PIN_DIR_INPUT;
+            break;
+        case PIN_OUTPUT:
+            pin_conf.direction  = PORT_PIN_DIR_OUTPUT;
+            break;
+        case PIN_INPUT_OUTPUT:
+            pin_conf.direction  = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
+            break;
+    }
+    port_pin_set_config(obj->pin, &pin_conf);
+}