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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

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Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_STM32F4XX/gpio_api.c@113:65a335a675de, 2014-03-10 (annotated)

Committer:
mbed_official
Date:
Mon Mar 10 11:30:07 2014 +0000
Revision:
113:65a335a675de
Parent:
20:4263a77256ae
Child:
227:7bd0639b8911
Synchronized with git revision 423ddcb86e83e2e0d599ca7106d436eb3c47e6dd



Full URL: https://github.com/mbedmicro/mbed/commit/423ddcb86e83e2e0d599ca7106d436eb3c47e6dd/



proposed change of gpio_api (new update pull request)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library
bogdanm 20:4263a77256ae 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 20:4263a77256ae 5 * you may not use this file except in compliance with the License.
bogdanm 20:4263a77256ae 6 * You may obtain a copy of the License at
bogdanm 20:4263a77256ae 7 *
bogdanm 20:4263a77256ae 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 20:4263a77256ae 9 *
bogdanm 20:4263a77256ae 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 20:4263a77256ae 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 20:4263a77256ae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 20:4263a77256ae 13 * See the License for the specific language governing permissions and
bogdanm 20:4263a77256ae 14 * limitations under the License.
bogdanm 20:4263a77256ae 15 */
bogdanm 20:4263a77256ae 16 #include "gpio_api.h"
bogdanm 20:4263a77256ae 17 #include "pinmap.h"
bogdanm 20:4263a77256ae 18
bogdanm 20:4263a77256ae 19 uint32_t gpio_set(PinName pin) {
bogdanm 20:4263a77256ae 20 uint32_t port_index = (uint32_t) pin >> 4;
bogdanm 20:4263a77256ae 21
bogdanm 20:4263a77256ae 22 // Enable GPIO peripheral clock
bogdanm 20:4263a77256ae 23 RCC->AHB1ENR |= 1 << port_index;
bogdanm 20:4263a77256ae 24
bogdanm 20:4263a77256ae 25 pin_function(pin, STM_PIN_DATA(0, 0));
bogdanm 20:4263a77256ae 26 return 1 << ((uint32_t) pin & 0xF);
bogdanm 20:4263a77256ae 27 }
bogdanm 20:4263a77256ae 28
mbed_official 113:65a335a675de 29 void gpio_init(gpio_t *obj, PinName pin) {
bogdanm 20:4263a77256ae 30 if(pin == NC) return;
bogdanm 20:4263a77256ae 31
bogdanm 20:4263a77256ae 32 obj->pin = pin;
bogdanm 20:4263a77256ae 33 obj->mask = gpio_set(pin);
bogdanm 20:4263a77256ae 34
bogdanm 20:4263a77256ae 35 uint32_t port_index = (uint32_t) pin >> 4;
bogdanm 20:4263a77256ae 36
bogdanm 20:4263a77256ae 37 GPIO_TypeDef *port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10));
bogdanm 20:4263a77256ae 38 obj->reg_mode = &port_reg->MODER;
bogdanm 20:4263a77256ae 39 obj->reg_set = &port_reg->BSRRL;
bogdanm 20:4263a77256ae 40 obj->reg_clr = &port_reg->BSRRH;
bogdanm 20:4263a77256ae 41 obj->reg_in = &port_reg->IDR;
bogdanm 20:4263a77256ae 42 }
bogdanm 20:4263a77256ae 43
bogdanm 20:4263a77256ae 44 void gpio_mode(gpio_t *obj, PinMode mode) {
bogdanm 20:4263a77256ae 45 pin_mode(obj->pin, mode);
bogdanm 20:4263a77256ae 46 }
bogdanm 20:4263a77256ae 47
bogdanm 20:4263a77256ae 48 void gpio_dir(gpio_t *obj, PinDirection direction) {
bogdanm 20:4263a77256ae 49 switch (direction) {
bogdanm 20:4263a77256ae 50 case PIN_INPUT : pin_function(obj->pin, STM_PIN_DATA(0, 0)); break;
bogdanm 20:4263a77256ae 51 case PIN_OUTPUT: pin_function(obj->pin, STM_PIN_DATA(1, 0)); break;
bogdanm 20:4263a77256ae 52 }
bogdanm 20:4263a77256ae 53 }