shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F4XX/gpio_api.c@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
113:65a335a675de 
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

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 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
bogdanm 20:4263a77256ae 17 #include "gpio_api.h"
bogdanm 20:4263a77256ae 18 #include "pinmap.h"
bogdanm 20:4263a77256ae 19
bogdanm 20:4263a77256ae 20 uint32_t gpio_set(PinName pin) {
mbed_official 227:7bd0639b8911 21 MBED_ASSERT(pin != (PinName)NC);
bogdanm 20:4263a77256ae 22 uint32_t port_index = (uint32_t) pin >> 4;
bogdanm 20:4263a77256ae 23
bogdanm 20:4263a77256ae 24 // Enable GPIO peripheral clock
bogdanm 20:4263a77256ae 25 RCC->AHB1ENR |= 1 << port_index;
bogdanm 20:4263a77256ae 26
bogdanm 20:4263a77256ae 27 pin_function(pin, STM_PIN_DATA(0, 0));
bogdanm 20:4263a77256ae 28 return 1 << ((uint32_t) pin & 0xF);
bogdanm 20:4263a77256ae 29 }
bogdanm 20:4263a77256ae 30
mbed_official 113:65a335a675de 31 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 227:7bd0639b8911 32 obj->pin = pin;
mbed_official 227:7bd0639b8911 33 if (pin == (PinName)NC)
mbed_official 227:7bd0639b8911 34 return;
bogdanm 20:4263a77256ae 35
bogdanm 20:4263a77256ae 36 obj->mask = gpio_set(pin);
bogdanm 20:4263a77256ae 37
bogdanm 20:4263a77256ae 38 uint32_t port_index = (uint32_t) pin >> 4;
bogdanm 20:4263a77256ae 39
bogdanm 20:4263a77256ae 40 GPIO_TypeDef *port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10));
bogdanm 20:4263a77256ae 41 obj->reg_mode = &port_reg->MODER;
bogdanm 20:4263a77256ae 42 obj->reg_set = &port_reg->BSRRL;
bogdanm 20:4263a77256ae 43 obj->reg_clr = &port_reg->BSRRH;
bogdanm 20:4263a77256ae 44 obj->reg_in = &port_reg->IDR;
bogdanm 20:4263a77256ae 45 }
bogdanm 20:4263a77256ae 46
bogdanm 20:4263a77256ae 47 void gpio_mode(gpio_t *obj, PinMode mode) {
bogdanm 20:4263a77256ae 48 pin_mode(obj->pin, mode);
bogdanm 20:4263a77256ae 49 }
bogdanm 20:4263a77256ae 50
bogdanm 20:4263a77256ae 51 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 227:7bd0639b8911 52 MBED_ASSERT(obj->pin != (PinName)NC);
bogdanm 20:4263a77256ae 53 switch (direction) {
mbed_official 227:7bd0639b8911 54 case PIN_INPUT :
mbed_official 227:7bd0639b8911 55 pin_function(obj->pin, STM_PIN_DATA(0, 0));
mbed_official 227:7bd0639b8911 56 break;
mbed_official 227:7bd0639b8911 57 case PIN_OUTPUT:
mbed_official 227:7bd0639b8911 58 pin_function(obj->pin, STM_PIN_DATA(1, 0));
mbed_official 227:7bd0639b8911 59 break;
bogdanm 20:4263a77256ae 60 }
bogdanm 20:4263a77256ae 61 }