teralytic / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed by teralytic

common/mbed_gpio.c@148:4802eb17e82b, 2016-10-17 (annotated)

Committer:
rodriguise
Date:
Mon Oct 17 18:47:01 2016 +0000
Revision:
148:4802eb17e82b
Parent:
144:ef7eb2e8f9f7 
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Who changed what in which revision?

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<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
<> 144:ef7eb2e8f9f7 19 {
<> 144:ef7eb2e8f9f7 20 gpio_init(gpio, pin);
<> 144:ef7eb2e8f9f7 21 if (pin != NC) {
<> 144:ef7eb2e8f9f7 22 gpio_dir(gpio, PIN_INPUT);
<> 144:ef7eb2e8f9f7 23 gpio_mode(gpio, mode);
<> 144:ef7eb2e8f9f7 24 }
<> 144:ef7eb2e8f9f7 25 }
<> 144:ef7eb2e8f9f7 26
<> 144:ef7eb2e8f9f7 27 static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
<> 144:ef7eb2e8f9f7 28 {
<> 144:ef7eb2e8f9f7 29 gpio_init(gpio, pin);
<> 144:ef7eb2e8f9f7 30 if (pin != NC) {
<> 144:ef7eb2e8f9f7 31 gpio_write(gpio, value);
<> 144:ef7eb2e8f9f7 32 gpio_dir(gpio, PIN_OUTPUT);
<> 144:ef7eb2e8f9f7 33 gpio_mode(gpio, mode);
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35 }
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 void gpio_init_in(gpio_t* gpio, PinName pin) {
<> 144:ef7eb2e8f9f7 38 gpio_init_in_ex(gpio, pin, PullDefault);
<> 144:ef7eb2e8f9f7 39 }
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
<> 144:ef7eb2e8f9f7 42 _gpio_init_in(gpio, pin, mode);
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 void gpio_init_out(gpio_t* gpio, PinName pin) {
<> 144:ef7eb2e8f9f7 46 gpio_init_out_ex(gpio, pin, 0);
<> 144:ef7eb2e8f9f7 47 }
<> 144:ef7eb2e8f9f7 48
<> 144:ef7eb2e8f9f7 49 void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
<> 144:ef7eb2e8f9f7 50 _gpio_init_out(gpio, pin, PullNone, value);
<> 144:ef7eb2e8f9f7 51 }
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
<> 144:ef7eb2e8f9f7 54 if (direction == PIN_INPUT) {
<> 144:ef7eb2e8f9f7 55 _gpio_init_in(gpio, pin, mode);
<> 144:ef7eb2e8f9f7 56 if (pin != NC)
<> 144:ef7eb2e8f9f7 57 gpio_write(gpio, value); // we prepare the value in case it is switched later
<> 144:ef7eb2e8f9f7 58 } else {
<> 144:ef7eb2e8f9f7 59 _gpio_init_out(gpio, pin, mode, value);
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61 }