Ermanno Brusadin / mbed

mbed library sources

Dependents:   FRDM-KL46Z_LCD_Test FRDM-KL46Z_LCD_Test FRDM-KL46Z_Plantilla FRDM-KL46Z_Plantilla ... more

targets/hal/TARGET_STM/TARGET_STM32F4XX/gpio_api.c@0:6bc4ac881c8e, 2016-07-28 (annotated)

Committer:
ebrus
Date:
Thu Jul 28 15:56:34 2016 +0000
Revision:
0:6bc4ac881c8e
1;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ebrus 0:6bc4ac881c8e 1 /* mbed Microcontroller Library
ebrus 0:6bc4ac881c8e 2 * Copyright (c) 2006-2013 ARM Limited
ebrus 0:6bc4ac881c8e 3 *
ebrus 0:6bc4ac881c8e 4 * Licensed under the Apache License, Version 2.0 (the "License");
ebrus 0:6bc4ac881c8e 5 * you may not use this file except in compliance with the License.
ebrus 0:6bc4ac881c8e 6 * You may obtain a copy of the License at
ebrus 0:6bc4ac881c8e 7 *
ebrus 0:6bc4ac881c8e 8 * http://www.apache.org/licenses/LICENSE-2.0
ebrus 0:6bc4ac881c8e 9 *
ebrus 0:6bc4ac881c8e 10 * Unless required by applicable law or agreed to in writing, software
ebrus 0:6bc4ac881c8e 11 * distributed under the License is distributed on an "AS IS" BASIS,
ebrus 0:6bc4ac881c8e 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ebrus 0:6bc4ac881c8e 13 * See the License for the specific language governing permissions and
ebrus 0:6bc4ac881c8e 14 * limitations under the License.
ebrus 0:6bc4ac881c8e 15 */
ebrus 0:6bc4ac881c8e 16 #include "mbed_assert.h"
ebrus 0:6bc4ac881c8e 17 #include "gpio_api.h"
ebrus 0:6bc4ac881c8e 18 #include "pinmap.h"
ebrus 0:6bc4ac881c8e 19
ebrus 0:6bc4ac881c8e 20 uint32_t gpio_set(PinName pin) {
ebrus 0:6bc4ac881c8e 21 MBED_ASSERT(pin != (PinName)NC);
ebrus 0:6bc4ac881c8e 22 uint32_t port_index = (uint32_t) pin >> 4;
ebrus 0:6bc4ac881c8e 23
ebrus 0:6bc4ac881c8e 24 // Enable GPIO peripheral clock
ebrus 0:6bc4ac881c8e 25 RCC->AHB1ENR |= 1 << port_index;
ebrus 0:6bc4ac881c8e 26
ebrus 0:6bc4ac881c8e 27 pin_function(pin, STM_PIN_DATA(0, 0));
ebrus 0:6bc4ac881c8e 28 return 1 << ((uint32_t) pin & 0xF);
ebrus 0:6bc4ac881c8e 29 }
ebrus 0:6bc4ac881c8e 30
ebrus 0:6bc4ac881c8e 31 void gpio_init(gpio_t *obj, PinName pin) {
ebrus 0:6bc4ac881c8e 32 obj->pin = pin;
ebrus 0:6bc4ac881c8e 33 if (pin == (PinName)NC)
ebrus 0:6bc4ac881c8e 34 return;
ebrus 0:6bc4ac881c8e 35
ebrus 0:6bc4ac881c8e 36 obj->mask = gpio_set(pin);
ebrus 0:6bc4ac881c8e 37
ebrus 0:6bc4ac881c8e 38 uint32_t port_index = (uint32_t) pin >> 4;
ebrus 0:6bc4ac881c8e 39
ebrus 0:6bc4ac881c8e 40 GPIO_TypeDef *port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10));
ebrus 0:6bc4ac881c8e 41 obj->reg_mode = &port_reg->MODER;
ebrus 0:6bc4ac881c8e 42 obj->reg_set = &port_reg->BSRRL;
ebrus 0:6bc4ac881c8e 43 obj->reg_clr = &port_reg->BSRRH;
ebrus 0:6bc4ac881c8e 44 obj->reg_in = &port_reg->IDR;
ebrus 0:6bc4ac881c8e 45 }
ebrus 0:6bc4ac881c8e 46
ebrus 0:6bc4ac881c8e 47 void gpio_mode(gpio_t *obj, PinMode mode) {
ebrus 0:6bc4ac881c8e 48 pin_mode(obj->pin, mode);
ebrus 0:6bc4ac881c8e 49 }
ebrus 0:6bc4ac881c8e 50
ebrus 0:6bc4ac881c8e 51 void gpio_dir(gpio_t *obj, PinDirection direction) {
ebrus 0:6bc4ac881c8e 52 MBED_ASSERT(obj->pin != (PinName)NC);
ebrus 0:6bc4ac881c8e 53 switch (direction) {
ebrus 0:6bc4ac881c8e 54 case PIN_INPUT :
ebrus 0:6bc4ac881c8e 55 pin_function(obj->pin, STM_PIN_DATA(0, 0));
ebrus 0:6bc4ac881c8e 56 break;
ebrus 0:6bc4ac881c8e 57 case PIN_OUTPUT:
ebrus 0:6bc4ac881c8e 58 pin_function(obj->pin, STM_PIN_DATA(1, 0));
ebrus 0:6bc4ac881c8e 59 break;
ebrus 0:6bc4ac881c8e 60 }
ebrus 0:6bc4ac881c8e 61 }