Jonathan Piat / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3XX/gpio_api.c@563:9f26fcd0c9ce, 2015-06-09 (annotated)

Committer:
mbed_official
Date:
Tue Jun 09 15:30:08 2015 +0100
Revision:
563:9f26fcd0c9ce
Parent:
285:31249416b6f9 
Synchronized with git revision a140fc60a6f74003a3d46c4ce8bf8c742148b9fd



Full URL: https://github.com/mbedmicro/mbed/commit/a140fc60a6f74003a3d46c4ce8bf8c742148b9fd/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 155:8435094ec241 1 /* mbed Microcontroller Library
mbed_official 155:8435094ec241 2 *******************************************************************************
mbed_official 155:8435094ec241 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 155:8435094ec241 4 * All rights reserved.
mbed_official 155:8435094ec241 5 *
mbed_official 155:8435094ec241 6 * Redistribution and use in source and binary forms, with or without
mbed_official 155:8435094ec241 7 * modification, are permitted provided that the following conditions are met:
mbed_official 155:8435094ec241 8 *
mbed_official 155:8435094ec241 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 155:8435094ec241 10 * this list of conditions and the following disclaimer.
mbed_official 155:8435094ec241 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 155:8435094ec241 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 155:8435094ec241 13 * and/or other materials provided with the distribution.
mbed_official 155:8435094ec241 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 155:8435094ec241 15 * may be used to endorse or promote products derived from this software
mbed_official 155:8435094ec241 16 * without specific prior written permission.
mbed_official 155:8435094ec241 17 *
mbed_official 155:8435094ec241 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 155:8435094ec241 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 155:8435094ec241 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 155:8435094ec241 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 155:8435094ec241 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 155:8435094ec241 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 155:8435094ec241 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 155:8435094ec241 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 155:8435094ec241 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 155:8435094ec241 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 155:8435094ec241 28 *******************************************************************************
mbed_official 155:8435094ec241 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 155:8435094ec241 31 #include "gpio_api.h"
mbed_official 155:8435094ec241 32 #include "pinmap.h"
mbed_official 285:31249416b6f9 33 #include "mbed_error.h"
mbed_official 155:8435094ec241 34
mbed_official 155:8435094ec241 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 155:8435094ec241 36
mbed_official 155:8435094ec241 37 uint32_t gpio_set(PinName pin) {
mbed_official 227:7bd0639b8911 38 MBED_ASSERT(pin != (PinName)NC);
mbed_official 155:8435094ec241 39
mbed_official 155:8435094ec241 40 pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 155:8435094ec241 41
mbed_official 155:8435094ec241 42 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 155:8435094ec241 43 }
mbed_official 155:8435094ec241 44
mbed_official 155:8435094ec241 45 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 227:7bd0639b8911 46 obj->pin = pin;
mbed_official 227:7bd0639b8911 47 if (pin == (PinName)NC)
mbed_official 227:7bd0639b8911 48 return;
mbed_official 155:8435094ec241 49
mbed_official 155:8435094ec241 50 uint32_t port_index = STM_PORT(pin);
mbed_official 155:8435094ec241 51
mbed_official 155:8435094ec241 52 // Enable GPIO clock
mbed_official 155:8435094ec241 53 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 155:8435094ec241 54 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 155:8435094ec241 55
mbed_official 155:8435094ec241 56 // Fill GPIO object structure for future use
mbed_official 155:8435094ec241 57 obj->mask = gpio_set(pin);
mbed_official 155:8435094ec241 58 obj->reg_in = &gpio->IDR;
mbed_official 155:8435094ec241 59 obj->reg_set = &gpio->BSRR;
mbed_official 155:8435094ec241 60 obj->reg_clr = &gpio->BRR;
mbed_official 155:8435094ec241 61 }
mbed_official 155:8435094ec241 62
mbed_official 155:8435094ec241 63 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 155:8435094ec241 64 pin_mode(obj->pin, mode);
mbed_official 155:8435094ec241 65 }
mbed_official 155:8435094ec241 66
mbed_official 155:8435094ec241 67 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 227:7bd0639b8911 68 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 155:8435094ec241 69 if (direction == PIN_OUTPUT) {
mbed_official 155:8435094ec241 70 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 155:8435094ec241 71 } else { // PIN_INPUT
mbed_official 155:8435094ec241 72 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 155:8435094ec241 73 }
mbed_official 155:8435094ec241 74 }