Adam Kucybala / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/gpio_api.c@219:993c9b0acbcc, 2014-06-02 (annotated)

Committer:
mbed_official
Date:
Mon Jun 02 09:45:07 2014 +0100
Revision:
219:993c9b0acbcc
Synchronized with git revision cd741909614c52b886d34bad5007da2057c1a185



Full URL: https://github.com/mbedmicro/mbed/commit/cd741909614c52b886d34bad5007da2057c1a185/



[NUCLEO_F072RB] Add HAL files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 *******************************************************************************
mbed_official 219:993c9b0acbcc 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 4 * All rights reserved.
mbed_official 219:993c9b0acbcc 5 *
mbed_official 219:993c9b0acbcc 6 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 7 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 8 *
mbed_official 219:993c9b0acbcc 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 10 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 13 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 15 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 16 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 17 *
mbed_official 219:993c9b0acbcc 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 28 *******************************************************************************
mbed_official 219:993c9b0acbcc 29 */
mbed_official 219:993c9b0acbcc 30 #include "gpio_api.h"
mbed_official 219:993c9b0acbcc 31 #include "pinmap.h"
mbed_official 219:993c9b0acbcc 32 #include "error.h"
mbed_official 219:993c9b0acbcc 33
mbed_official 219:993c9b0acbcc 34 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 219:993c9b0acbcc 35
mbed_official 219:993c9b0acbcc 36 uint32_t gpio_set(PinName pin) {
mbed_official 219:993c9b0acbcc 37 if (pin == NC) return 0;
mbed_official 219:993c9b0acbcc 38
mbed_official 219:993c9b0acbcc 39 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 40
mbed_official 219:993c9b0acbcc 41 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 219:993c9b0acbcc 42 }
mbed_official 219:993c9b0acbcc 43
mbed_official 219:993c9b0acbcc 44 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 219:993c9b0acbcc 45 if (pin == NC) return;
mbed_official 219:993c9b0acbcc 46
mbed_official 219:993c9b0acbcc 47 uint32_t port_index = STM_PORT(pin);
mbed_official 219:993c9b0acbcc 48
mbed_official 219:993c9b0acbcc 49 // Enable GPIO clock
mbed_official 219:993c9b0acbcc 50 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 219:993c9b0acbcc 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 219:993c9b0acbcc 52
mbed_official 219:993c9b0acbcc 53 // Fill GPIO object structure for future use
mbed_official 219:993c9b0acbcc 54 obj->pin = pin;
mbed_official 219:993c9b0acbcc 55 obj->mask = gpio_set(pin);
mbed_official 219:993c9b0acbcc 56 obj->reg_in = &gpio->IDR;
mbed_official 219:993c9b0acbcc 57 obj->reg_set = &gpio->BSRRL;
mbed_official 219:993c9b0acbcc 58 obj->reg_clr = &gpio->BSRRH;
mbed_official 219:993c9b0acbcc 59 }
mbed_official 219:993c9b0acbcc 60
mbed_official 219:993c9b0acbcc 61 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 219:993c9b0acbcc 62 pin_mode(obj->pin, mode);
mbed_official 219:993c9b0acbcc 63 }
mbed_official 219:993c9b0acbcc 64
mbed_official 219:993c9b0acbcc 65 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 219:993c9b0acbcc 66 if (direction == PIN_OUTPUT) {
mbed_official 219:993c9b0acbcc 67 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 68 } else { // PIN_INPUT
mbed_official 219:993c9b0acbcc 69 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 70 }
mbed_official 219:993c9b0acbcc 71 }