Bob Seque / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

common/gpio.c@57:dd901dec6bd0, 2016-01-30 (annotated)

Committer:
Splith
Date:
Sat Jan 30 16:48:54 2016 +0000
Revision:
57:dd901dec6bd0
Parent:
0:9b334a45a8ff 
Add USART3 pin mapping to Seeed arch max

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "gpio_api.h"
bogdanm 0:9b334a45a8ff 17
bogdanm 0:9b334a45a8ff 18 static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
bogdanm 0:9b334a45a8ff 19 {
bogdanm 0:9b334a45a8ff 20 gpio_init(gpio, pin);
bogdanm 0:9b334a45a8ff 21 if (pin != NC) {
bogdanm 0:9b334a45a8ff 22 gpio_dir(gpio, PIN_INPUT);
bogdanm 0:9b334a45a8ff 23 gpio_mode(gpio, mode);
bogdanm 0:9b334a45a8ff 24 }
bogdanm 0:9b334a45a8ff 25 }
bogdanm 0:9b334a45a8ff 26
bogdanm 0:9b334a45a8ff 27 static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
bogdanm 0:9b334a45a8ff 28 {
bogdanm 0:9b334a45a8ff 29 gpio_init(gpio, pin);
bogdanm 0:9b334a45a8ff 30 if (pin != NC) {
bogdanm 0:9b334a45a8ff 31 gpio_write(gpio, value);
bogdanm 0:9b334a45a8ff 32 gpio_dir(gpio, PIN_OUTPUT);
bogdanm 0:9b334a45a8ff 33 gpio_mode(gpio, mode);
bogdanm 0:9b334a45a8ff 34 }
bogdanm 0:9b334a45a8ff 35 }
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 void gpio_init_in(gpio_t* gpio, PinName pin) {
bogdanm 0:9b334a45a8ff 38 gpio_init_in_ex(gpio, pin, PullDefault);
bogdanm 0:9b334a45a8ff 39 }
bogdanm 0:9b334a45a8ff 40
bogdanm 0:9b334a45a8ff 41 void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
bogdanm 0:9b334a45a8ff 42 _gpio_init_in(gpio, pin, mode);
bogdanm 0:9b334a45a8ff 43 }
bogdanm 0:9b334a45a8ff 44
bogdanm 0:9b334a45a8ff 45 void gpio_init_out(gpio_t* gpio, PinName pin) {
bogdanm 0:9b334a45a8ff 46 gpio_init_out_ex(gpio, pin, 0);
bogdanm 0:9b334a45a8ff 47 }
bogdanm 0:9b334a45a8ff 48
bogdanm 0:9b334a45a8ff 49 void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
bogdanm 0:9b334a45a8ff 50 _gpio_init_out(gpio, pin, PullNone, value);
bogdanm 0:9b334a45a8ff 51 }
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
bogdanm 0:9b334a45a8ff 54 if (direction == PIN_INPUT) {
bogdanm 0:9b334a45a8ff 55 _gpio_init_in(gpio, pin, mode);
bogdanm 0:9b334a45a8ff 56 if (pin != NC)
bogdanm 0:9b334a45a8ff 57 gpio_write(gpio, value); // we prepare the value in case it is switched later
bogdanm 0:9b334a45a8ff 58 } else {
bogdanm 0:9b334a45a8ff 59 _gpio_init_out(gpio, pin, mode, value);
bogdanm 0:9b334a45a8ff 60 }
bogdanm 0:9b334a45a8ff 61 }