Gan likun / mbed-dev11

hal/mbed_gpio.c@0:06036f8bee2d, 2022-10-24 (annotated)

Committer:
ganlikun
Date:
Mon Oct 24 15:19:39 2022 +0000
Revision:
0:06036f8bee2d
11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:06036f8bee2d 1 /* mbed Microcontroller Library
ganlikun 0:06036f8bee2d 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:06036f8bee2d 3 *
ganlikun 0:06036f8bee2d 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:06036f8bee2d 5 * you may not use this file except in compliance with the License.
ganlikun 0:06036f8bee2d 6 * You may obtain a copy of the License at
ganlikun 0:06036f8bee2d 7 *
ganlikun 0:06036f8bee2d 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:06036f8bee2d 9 *
ganlikun 0:06036f8bee2d 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:06036f8bee2d 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:06036f8bee2d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:06036f8bee2d 13 * See the License for the specific language governing permissions and
ganlikun 0:06036f8bee2d 14 * limitations under the License.
ganlikun 0:06036f8bee2d 15 */
ganlikun 0:06036f8bee2d 16 #include "hal/gpio_api.h"
ganlikun 0:06036f8bee2d 17
ganlikun 0:06036f8bee2d 18 static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
ganlikun 0:06036f8bee2d 19 {
ganlikun 0:06036f8bee2d 20 gpio_init(gpio, pin);
ganlikun 0:06036f8bee2d 21 if (pin != NC) {
ganlikun 0:06036f8bee2d 22 gpio_dir(gpio, PIN_INPUT);
ganlikun 0:06036f8bee2d 23 gpio_mode(gpio, mode);
ganlikun 0:06036f8bee2d 24 }
ganlikun 0:06036f8bee2d 25 }
ganlikun 0:06036f8bee2d 26
ganlikun 0:06036f8bee2d 27 static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
ganlikun 0:06036f8bee2d 28 {
ganlikun 0:06036f8bee2d 29 gpio_init(gpio, pin);
ganlikun 0:06036f8bee2d 30 if (pin != NC) {
ganlikun 0:06036f8bee2d 31 gpio_write(gpio, value);
ganlikun 0:06036f8bee2d 32 gpio_dir(gpio, PIN_OUTPUT);
ganlikun 0:06036f8bee2d 33 gpio_mode(gpio, mode);
ganlikun 0:06036f8bee2d 34 }
ganlikun 0:06036f8bee2d 35 }
ganlikun 0:06036f8bee2d 36
ganlikun 0:06036f8bee2d 37 void gpio_init_in(gpio_t* gpio, PinName pin) {
ganlikun 0:06036f8bee2d 38 gpio_init_in_ex(gpio, pin, PullDefault);
ganlikun 0:06036f8bee2d 39 }
ganlikun 0:06036f8bee2d 40
ganlikun 0:06036f8bee2d 41 void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
ganlikun 0:06036f8bee2d 42 _gpio_init_in(gpio, pin, mode);
ganlikun 0:06036f8bee2d 43 }
ganlikun 0:06036f8bee2d 44
ganlikun 0:06036f8bee2d 45 void gpio_init_out(gpio_t* gpio, PinName pin) {
ganlikun 0:06036f8bee2d 46 gpio_init_out_ex(gpio, pin, 0);
ganlikun 0:06036f8bee2d 47 }
ganlikun 0:06036f8bee2d 48
ganlikun 0:06036f8bee2d 49 void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
ganlikun 0:06036f8bee2d 50 _gpio_init_out(gpio, pin, PullNone, value);
ganlikun 0:06036f8bee2d 51 }
ganlikun 0:06036f8bee2d 52
ganlikun 0:06036f8bee2d 53 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
ganlikun 0:06036f8bee2d 54 if (direction == PIN_INPUT) {
ganlikun 0:06036f8bee2d 55 _gpio_init_in(gpio, pin, mode);
ganlikun 0:06036f8bee2d 56 if (pin != NC)
ganlikun 0:06036f8bee2d 57 gpio_write(gpio, value); // we prepare the value in case it is switched later
ganlikun 0:06036f8bee2d 58 } else {
ganlikun 0:06036f8bee2d 59 _gpio_init_out(gpio, pin, mode, value);
ganlikun 0:06036f8bee2d 60 }
ganlikun 0:06036f8bee2d 61 }
ganlikun 0:06036f8bee2d 62