Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32F1/gpio_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 *******************************************************************************
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2014, STMicroelectronics
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 12 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 13 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 15 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 16 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 28 *******************************************************************************
bogdanm 0:9b334a45a8ff 29 */
bogdanm 0:9b334a45a8ff 30 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 31 #include "gpio_api.h"
bogdanm 0:9b334a45a8ff 32 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 33 #include "mbed_error.h"
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 uint32_t gpio_set(PinName pin)
bogdanm 0:9b334a45a8ff 38 {
bogdanm 0:9b334a45a8ff 39 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 40
bogdanm 0:9b334a45a8ff 41 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
bogdanm 0:9b334a45a8ff 44 }
bogdanm 0:9b334a45a8ff 45
bogdanm 0:9b334a45a8ff 46 void gpio_init(gpio_t *obj, PinName pin)
bogdanm 0:9b334a45a8ff 47 {
bogdanm 0:9b334a45a8ff 48 obj->pin = pin;
bogdanm 0:9b334a45a8ff 49 if (pin == (PinName)NC) {
bogdanm 0:9b334a45a8ff 50 return;
bogdanm 0:9b334a45a8ff 51 }
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 uint32_t port_index = STM_PORT(pin);
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 // Enable GPIO clock
bogdanm 0:9b334a45a8ff 56 uint32_t gpio_add = Set_GPIO_Clock(port_index);
bogdanm 0:9b334a45a8ff 57 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
bogdanm 0:9b334a45a8ff 58
bogdanm 0:9b334a45a8ff 59 // Fill GPIO object structure for future use
bogdanm 0:9b334a45a8ff 60 obj->mask = gpio_set(pin);
bogdanm 0:9b334a45a8ff 61 obj->reg_in = &gpio->IDR;
bogdanm 0:9b334a45a8ff 62 obj->reg_set = &gpio->BSRR;
bogdanm 0:9b334a45a8ff 63 obj->reg_clr = &gpio->BRR;
bogdanm 0:9b334a45a8ff 64 }
bogdanm 0:9b334a45a8ff 65
bogdanm 0:9b334a45a8ff 66 void gpio_mode(gpio_t *obj, PinMode mode)
bogdanm 0:9b334a45a8ff 67 {
bogdanm 0:9b334a45a8ff 68 pin_mode(obj->pin, mode);
bogdanm 0:9b334a45a8ff 69 }
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 void gpio_dir(gpio_t *obj, PinDirection direction)
bogdanm 0:9b334a45a8ff 72 {
bogdanm 0:9b334a45a8ff 73 MBED_ASSERT(obj->pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 74 if (direction == PIN_OUTPUT) {
bogdanm 0:9b334a45a8ff 75 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
bogdanm 0:9b334a45a8ff 76 } else { // PIN_INPUT
bogdanm 0:9b334a45a8ff 77 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
bogdanm 0:9b334a45a8ff 78 }
bogdanm 0:9b334a45a8ff 79 }