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/* 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);
}
}