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_NUCLEO_L053R8/gpio_api.c@181:a4cbdfbbd2f4, 2014-05-07 (annotated)

Committer:
mbed_official
Date:
Wed May 07 13:15:08 2014 +0100
Revision:
181:a4cbdfbbd2f4
Child:
227:7bd0639b8911
Synchronized with git revision 7751e759576c6fd68deccb81ea82bac19ed41745



Full URL: https://github.com/mbedmicro/mbed/commit/7751e759576c6fd68deccb81ea82bac19ed41745/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 4 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 5 *
mbed_official 181:a4cbdfbbd2f4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 8 *
mbed_official 181:a4cbdfbbd2f4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 10 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 13 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 15 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 16 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 17 *
mbed_official 181:a4cbdfbbd2f4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 28 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 29 */
mbed_official 181:a4cbdfbbd2f4 30 #include "gpio_api.h"
mbed_official 181:a4cbdfbbd2f4 31 #include "pinmap.h"
mbed_official 181:a4cbdfbbd2f4 32 #include "error.h"
mbed_official 181:a4cbdfbbd2f4 33
mbed_official 181:a4cbdfbbd2f4 34 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 181:a4cbdfbbd2f4 35
mbed_official 181:a4cbdfbbd2f4 36 uint32_t gpio_set(PinName pin) {
mbed_official 181:a4cbdfbbd2f4 37 if (pin == NC) return 0;
mbed_official 181:a4cbdfbbd2f4 38
mbed_official 181:a4cbdfbbd2f4 39 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 40
mbed_official 181:a4cbdfbbd2f4 41 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 181:a4cbdfbbd2f4 42 }
mbed_official 181:a4cbdfbbd2f4 43
mbed_official 181:a4cbdfbbd2f4 44 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 181:a4cbdfbbd2f4 45 if (pin == NC) return;
mbed_official 181:a4cbdfbbd2f4 46
mbed_official 181:a4cbdfbbd2f4 47 uint32_t port_index = STM_PORT(pin);
mbed_official 181:a4cbdfbbd2f4 48
mbed_official 181:a4cbdfbbd2f4 49 // Enable GPIO clock
mbed_official 181:a4cbdfbbd2f4 50 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 181:a4cbdfbbd2f4 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 181:a4cbdfbbd2f4 52
mbed_official 181:a4cbdfbbd2f4 53 // Fill GPIO object structure for future use
mbed_official 181:a4cbdfbbd2f4 54 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 55 obj->mask = gpio_set(pin);
mbed_official 181:a4cbdfbbd2f4 56 obj->reg_in = &gpio->IDR;
mbed_official 181:a4cbdfbbd2f4 57 obj->reg_set = &gpio->BSRR;
mbed_official 181:a4cbdfbbd2f4 58 obj->reg_clr = &gpio->BRR;
mbed_official 181:a4cbdfbbd2f4 59 }
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 181:a4cbdfbbd2f4 61 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 181:a4cbdfbbd2f4 62 pin_mode(obj->pin, mode);
mbed_official 181:a4cbdfbbd2f4 63 }
mbed_official 181:a4cbdfbbd2f4 64
mbed_official 181:a4cbdfbbd2f4 65 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 181:a4cbdfbbd2f4 66 if (direction == PIN_OUTPUT) {
mbed_official 181:a4cbdfbbd2f4 67 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 68 } else { // PIN_INPUT
mbed_official 181:a4cbdfbbd2f4 69 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 70 }
mbed_official 181:a4cbdfbbd2f4 71 }