Lee Kai Xuan / mbed-os

mbed-os

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hal/mbed_gpio.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "hal/gpio_api.h"
elessair 0:f269e3021894 17
elessair 0:f269e3021894 18 static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
elessair 0:f269e3021894 19 {
elessair 0:f269e3021894 20 gpio_init(gpio, pin);
elessair 0:f269e3021894 21 if (pin != NC) {
elessair 0:f269e3021894 22 gpio_dir(gpio, PIN_INPUT);
elessair 0:f269e3021894 23 gpio_mode(gpio, mode);
elessair 0:f269e3021894 24 }
elessair 0:f269e3021894 25 }
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
elessair 0:f269e3021894 28 {
elessair 0:f269e3021894 29 gpio_init(gpio, pin);
elessair 0:f269e3021894 30 if (pin != NC) {
elessair 0:f269e3021894 31 gpio_write(gpio, value);
elessair 0:f269e3021894 32 gpio_dir(gpio, PIN_OUTPUT);
elessair 0:f269e3021894 33 gpio_mode(gpio, mode);
elessair 0:f269e3021894 34 }
elessair 0:f269e3021894 35 }
elessair 0:f269e3021894 36
elessair 0:f269e3021894 37 void gpio_init_in(gpio_t* gpio, PinName pin) {
elessair 0:f269e3021894 38 gpio_init_in_ex(gpio, pin, PullDefault);
elessair 0:f269e3021894 39 }
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
elessair 0:f269e3021894 42 _gpio_init_in(gpio, pin, mode);
elessair 0:f269e3021894 43 }
elessair 0:f269e3021894 44
elessair 0:f269e3021894 45 void gpio_init_out(gpio_t* gpio, PinName pin) {
elessair 0:f269e3021894 46 gpio_init_out_ex(gpio, pin, 0);
elessair 0:f269e3021894 47 }
elessair 0:f269e3021894 48
elessair 0:f269e3021894 49 void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
elessair 0:f269e3021894 50 _gpio_init_out(gpio, pin, PullNone, value);
elessair 0:f269e3021894 51 }
elessair 0:f269e3021894 52
elessair 0:f269e3021894 53 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
elessair 0:f269e3021894 54 if (direction == PIN_INPUT) {
elessair 0:f269e3021894 55 _gpio_init_in(gpio, pin, mode);
elessair 0:f269e3021894 56 if (pin != NC)
elessair 0:f269e3021894 57 gpio_write(gpio, value); // we prepare the value in case it is switched later
elessair 0:f269e3021894 58 } else {
elessair 0:f269e3021894 59 _gpio_init_out(gpio, pin, mode, value);
elessair 0:f269e3021894 60 }
elessair 0:f269e3021894 61 }