Greg Steiert / maxim-dev

Maxim mbed development library

Dependents:   MAX34417_demo MAXREFDES1265 MAXREFDES1265

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hal/mbed_gpio.c@164:2e7515f8c45d, 2017-03-24 (annotated)

Committer:
switches
Date:
Fri Mar 24 15:15:13 2017 +0000
Revision:
164:2e7515f8c45d
Parent:
149:156823d33999 
Added low level init to clear IO registers

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