mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

hal/mbed_gpio.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
187:0387e8f68319 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 6 * you may not use this file except in compliance with the License.
<> 149:156823d33999 7 * You may obtain a copy of the License at
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 10 *
<> 149:156823d33999 11 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 12 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 14 * See the License for the specific language governing permissions and
<> 149:156823d33999 15 * limitations under the License.
<> 149:156823d33999 16 */
<> 149:156823d33999 17 #include "hal/gpio_api.h"
<> 149:156823d33999 18
AnnaBridge 187:0387e8f68319 19 static inline void _gpio_init_in(gpio_t *gpio, PinName pin, PinMode mode)
<> 149:156823d33999 20 {
<> 149:156823d33999 21 gpio_init(gpio, pin);
<> 149:156823d33999 22 if (pin != NC) {
<> 149:156823d33999 23 gpio_dir(gpio, PIN_INPUT);
<> 149:156823d33999 24 gpio_mode(gpio, mode);
<> 149:156823d33999 25 }
<> 149:156823d33999 26 }
<> 149:156823d33999 27
AnnaBridge 187:0387e8f68319 28 static inline void _gpio_init_out(gpio_t *gpio, PinName pin, PinMode mode, int value)
<> 149:156823d33999 29 {
<> 149:156823d33999 30 gpio_init(gpio, pin);
<> 149:156823d33999 31 if (pin != NC) {
<> 149:156823d33999 32 gpio_write(gpio, value);
<> 149:156823d33999 33 gpio_dir(gpio, PIN_OUTPUT);
<> 149:156823d33999 34 gpio_mode(gpio, mode);
<> 149:156823d33999 35 }
<> 149:156823d33999 36 }
<> 149:156823d33999 37
AnnaBridge 187:0387e8f68319 38 void gpio_init_in(gpio_t *gpio, PinName pin)
AnnaBridge 187:0387e8f68319 39 {
<> 149:156823d33999 40 gpio_init_in_ex(gpio, pin, PullDefault);
<> 149:156823d33999 41 }
<> 149:156823d33999 42
AnnaBridge 187:0387e8f68319 43 void gpio_init_in_ex(gpio_t *gpio, PinName pin, PinMode mode)
AnnaBridge 187:0387e8f68319 44 {
<> 149:156823d33999 45 _gpio_init_in(gpio, pin, mode);
<> 149:156823d33999 46 }
<> 149:156823d33999 47
AnnaBridge 187:0387e8f68319 48 void gpio_init_out(gpio_t *gpio, PinName pin)
AnnaBridge 187:0387e8f68319 49 {
<> 149:156823d33999 50 gpio_init_out_ex(gpio, pin, 0);
<> 149:156823d33999 51 }
<> 149:156823d33999 52
AnnaBridge 187:0387e8f68319 53 void gpio_init_out_ex(gpio_t *gpio, PinName pin, int value)
AnnaBridge 187:0387e8f68319 54 {
<> 149:156823d33999 55 _gpio_init_out(gpio, pin, PullNone, value);
<> 149:156823d33999 56 }
<> 149:156823d33999 57
AnnaBridge 187:0387e8f68319 58 void gpio_init_inout(gpio_t *gpio, PinName pin, PinDirection direction, PinMode mode, int value)
AnnaBridge 187:0387e8f68319 59 {
<> 149:156823d33999 60 if (direction == PIN_INPUT) {
<> 149:156823d33999 61 _gpio_init_in(gpio, pin, mode);
AnnaBridge 187:0387e8f68319 62 if (pin != NC) {
AnnaBridge 187:0387e8f68319 63 gpio_write(gpio, value); // we prepare the value in case it is switched later
AnnaBridge 187:0387e8f68319 64 }
<> 149:156823d33999 65 } else {
<> 149:156823d33999 66 _gpio_init_out(gpio, pin, mode, value);
<> 149:156823d33999 67 }
<> 149:156823d33999 68 }