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Dependents:   SPI_slave_frdm

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F100RB/gpio_api.c@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
126:549ba18ddd81
Child:
250:a49055e7a707
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 126:549ba18ddd81 1 /* mbed Microcontroller Library
mbed_official 126:549ba18ddd81 2 *******************************************************************************
mbed_official 126:549ba18ddd81 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 126:549ba18ddd81 4 * All rights reserved.
mbed_official 126:549ba18ddd81 5 *
mbed_official 126:549ba18ddd81 6 * Redistribution and use in source and binary forms, with or without
mbed_official 126:549ba18ddd81 7 * modification, are permitted provided that the following conditions are met:
mbed_official 126:549ba18ddd81 8 *
mbed_official 126:549ba18ddd81 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 126:549ba18ddd81 10 * this list of conditions and the following disclaimer.
mbed_official 126:549ba18ddd81 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 126:549ba18ddd81 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 126:549ba18ddd81 13 * and/or other materials provided with the distribution.
mbed_official 126:549ba18ddd81 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 126:549ba18ddd81 15 * may be used to endorse or promote products derived from this software
mbed_official 126:549ba18ddd81 16 * without specific prior written permission.
mbed_official 126:549ba18ddd81 17 *
mbed_official 126:549ba18ddd81 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 126:549ba18ddd81 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 126:549ba18ddd81 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 126:549ba18ddd81 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 126:549ba18ddd81 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 126:549ba18ddd81 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 126:549ba18ddd81 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 126:549ba18ddd81 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 126:549ba18ddd81 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 126:549ba18ddd81 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 126:549ba18ddd81 28 *******************************************************************************
mbed_official 126:549ba18ddd81 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 126:549ba18ddd81 31 #include "gpio_api.h"
mbed_official 126:549ba18ddd81 32 #include "pinmap.h"
mbed_official 126:549ba18ddd81 33 #include "error.h"
mbed_official 126:549ba18ddd81 34
mbed_official 126:549ba18ddd81 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 126:549ba18ddd81 36
mbed_official 227:7bd0639b8911 37 uint32_t gpio_set(PinName pin) {
mbed_official 227:7bd0639b8911 38 MBED_ASSERT(pin != (PinName)NC);
mbed_official 126:549ba18ddd81 39
mbed_official 126:549ba18ddd81 40 pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 126:549ba18ddd81 41 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 126:549ba18ddd81 42 }
mbed_official 126:549ba18ddd81 43
mbed_official 126:549ba18ddd81 44 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 227:7bd0639b8911 45 obj->pin = pin;
mbed_official 227:7bd0639b8911 46 if (pin == (PinName)NC)
mbed_official 227:7bd0639b8911 47 return;
mbed_official 126:549ba18ddd81 48
mbed_official 126:549ba18ddd81 49 uint32_t port_index = STM_PORT(pin);
mbed_official 126:549ba18ddd81 50
mbed_official 126:549ba18ddd81 51 // Enable GPIO clock
mbed_official 126:549ba18ddd81 52 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 126:549ba18ddd81 53 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 126:549ba18ddd81 54
mbed_official 126:549ba18ddd81 55 // Fill GPIO object structure for future use
mbed_official 126:549ba18ddd81 56 obj->mask = gpio_set(pin);
mbed_official 126:549ba18ddd81 57 obj->reg_in = &gpio->IDR;
mbed_official 126:549ba18ddd81 58 obj->reg_set = &gpio->BSRR;
mbed_official 126:549ba18ddd81 59 obj->reg_clr = &gpio->BRR;
mbed_official 126:549ba18ddd81 60 }
mbed_official 126:549ba18ddd81 61
mbed_official 126:549ba18ddd81 62 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 126:549ba18ddd81 63 pin_mode(obj->pin, mode);
mbed_official 126:549ba18ddd81 64 }
mbed_official 126:549ba18ddd81 65
mbed_official 126:549ba18ddd81 66 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 227:7bd0639b8911 67 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 126:549ba18ddd81 68 if (direction == PIN_OUTPUT) {
mbed_official 126:549ba18ddd81 69 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_Out_PP, 0));
mbed_official 126:549ba18ddd81 70 }
mbed_official 126:549ba18ddd81 71 else { // PIN_INPUT
mbed_official 126:549ba18ddd81 72 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 126:549ba18ddd81 73 }
mbed_official 126:549ba18ddd81 74 }