Ermanno Brusadin / mbed-src

mbed library sources

common/gpio.c@0:0a673c671a56, 2016-07-27 (annotated)

Committer:
ebrus
Date:
Wed Jul 27 18:35:32 2016 +0000
Revision:
0:0a673c671a56
4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ebrus 0:0a673c671a56 1 /* mbed Microcontroller Library
ebrus 0:0a673c671a56 2 * Copyright (c) 2006-2013 ARM Limited
ebrus 0:0a673c671a56 3 *
ebrus 0:0a673c671a56 4 * Licensed under the Apache License, Version 2.0 (the "License");
ebrus 0:0a673c671a56 5 * you may not use this file except in compliance with the License.
ebrus 0:0a673c671a56 6 * You may obtain a copy of the License at
ebrus 0:0a673c671a56 7 *
ebrus 0:0a673c671a56 8 * http://www.apache.org/licenses/LICENSE-2.0
ebrus 0:0a673c671a56 9 *
ebrus 0:0a673c671a56 10 * Unless required by applicable law or agreed to in writing, software
ebrus 0:0a673c671a56 11 * distributed under the License is distributed on an "AS IS" BASIS,
ebrus 0:0a673c671a56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ebrus 0:0a673c671a56 13 * See the License for the specific language governing permissions and
ebrus 0:0a673c671a56 14 * limitations under the License.
ebrus 0:0a673c671a56 15 */
ebrus 0:0a673c671a56 16 #include "gpio_api.h"
ebrus 0:0a673c671a56 17
ebrus 0:0a673c671a56 18 static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
ebrus 0:0a673c671a56 19 {
ebrus 0:0a673c671a56 20 gpio_init(gpio, pin);
ebrus 0:0a673c671a56 21 if (pin != NC) {
ebrus 0:0a673c671a56 22 gpio_dir(gpio, PIN_INPUT);
ebrus 0:0a673c671a56 23 gpio_mode(gpio, mode);
ebrus 0:0a673c671a56 24 }
ebrus 0:0a673c671a56 25 }
ebrus 0:0a673c671a56 26
ebrus 0:0a673c671a56 27 static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
ebrus 0:0a673c671a56 28 {
ebrus 0:0a673c671a56 29 gpio_init(gpio, pin);
ebrus 0:0a673c671a56 30 if (pin != NC) {
ebrus 0:0a673c671a56 31 gpio_write(gpio, value);
ebrus 0:0a673c671a56 32 gpio_dir(gpio, PIN_OUTPUT);
ebrus 0:0a673c671a56 33 gpio_mode(gpio, mode);
ebrus 0:0a673c671a56 34 }
ebrus 0:0a673c671a56 35 }
ebrus 0:0a673c671a56 36
ebrus 0:0a673c671a56 37 void gpio_init_in(gpio_t* gpio, PinName pin) {
ebrus 0:0a673c671a56 38 gpio_init_in_ex(gpio, pin, PullDefault);
ebrus 0:0a673c671a56 39 }
ebrus 0:0a673c671a56 40
ebrus 0:0a673c671a56 41 void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
ebrus 0:0a673c671a56 42 _gpio_init_in(gpio, pin, mode);
ebrus 0:0a673c671a56 43 }
ebrus 0:0a673c671a56 44
ebrus 0:0a673c671a56 45 void gpio_init_out(gpio_t* gpio, PinName pin) {
ebrus 0:0a673c671a56 46 gpio_init_out_ex(gpio, pin, 0);
ebrus 0:0a673c671a56 47 }
ebrus 0:0a673c671a56 48
ebrus 0:0a673c671a56 49 void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
ebrus 0:0a673c671a56 50 _gpio_init_out(gpio, pin, PullNone, value);
ebrus 0:0a673c671a56 51 }
ebrus 0:0a673c671a56 52
ebrus 0:0a673c671a56 53 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
ebrus 0:0a673c671a56 54 if (direction == PIN_INPUT) {
ebrus 0:0a673c671a56 55 _gpio_init_in(gpio, pin, mode);
ebrus 0:0a673c671a56 56 if (pin != NC)
ebrus 0:0a673c671a56 57 gpio_write(gpio, value); // we prepare the value in case it is switched later
ebrus 0:0a673c671a56 58 } else {
ebrus 0:0a673c671a56 59 _gpio_init_out(gpio, pin, mode, value);
ebrus 0:0a673c671a56 60 }
ebrus 0:0a673c671a56 61 }