mirror of https://github.com/ARMmbed/mbed-os.git
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "hal/gpio_api.h"
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static inline void _gpio_init_in(gpio_t *gpio, PinName pin, PinMode mode)
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{
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gpio_init(gpio, pin);
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if (pin != NC) {
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gpio_dir(gpio, PIN_INPUT);
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gpio_mode(gpio, mode);
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}
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}
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static inline void _gpio_init_out(gpio_t *gpio, PinName pin, PinMode mode, int value)
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{
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gpio_init(gpio, pin);
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if (pin != NC) {
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gpio_write(gpio, value);
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gpio_dir(gpio, PIN_OUTPUT);
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gpio_mode(gpio, mode);
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}
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}
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void gpio_init_in(gpio_t *gpio, PinName pin)
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{
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gpio_init_in_ex(gpio, pin, PullDefault);
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}
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void gpio_init_in_ex(gpio_t *gpio, PinName pin, PinMode mode)
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{
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_gpio_init_in(gpio, pin, mode);
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}
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void gpio_init_out(gpio_t *gpio, PinName pin)
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{
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gpio_init_out_ex(gpio, pin, 0);
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}
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void gpio_init_out_ex(gpio_t *gpio, PinName pin, int value)
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{
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_gpio_init_out(gpio, pin, PullNone, value);
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}
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void gpio_init_inout(gpio_t *gpio, PinName pin, PinDirection direction, PinMode mode, int value)
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{
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if (direction == PIN_INPUT) {
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_gpio_init_in(gpio, pin, mode);
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if (pin != NC) {
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gpio_write(gpio, value); // we prepare the value in case it is switched later
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}
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} else {
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_gpio_init_out(gpio, pin, mode, value);
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}
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}
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