test / mbed-src

mbed library sources

Dependents:   bare

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/gpio_api.c@113:65a335a675de, 2014-03-10 (annotated)

Committer:
mbed_official
Date:
Mon Mar 10 11:30:07 2014 +0000
Revision:
113:65a335a675de
Parent:
84:f54042cbc282 
Synchronized with git revision 423ddcb86e83e2e0d599ca7106d436eb3c47e6dd



Full URL: https://github.com/mbedmicro/mbed/commit/423ddcb86e83e2e0d599ca7106d436eb3c47e6dd/



proposed change of gpio_api (new update pull request)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 52:a51c77007319 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 52:a51c77007319 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 52:a51c77007319 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 52:a51c77007319 29 */
mbed_official 52:a51c77007319 30 #include "gpio_api.h"
mbed_official 52:a51c77007319 31 #include "pinmap.h"
mbed_official 76:aeb1df146756 32 #include "error.h"
mbed_official 76:aeb1df146756 33
mbed_official 76:aeb1df146756 34 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 52:a51c77007319 35
mbed_official 52:a51c77007319 36 uint32_t gpio_set(PinName pin) {
mbed_official 52:a51c77007319 37 if (pin == NC) return 0;
mbed_official 52:a51c77007319 38
mbed_official 52:a51c77007319 39 pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 52:a51c77007319 40
mbed_official 52:a51c77007319 41 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 52:a51c77007319 42 }
mbed_official 52:a51c77007319 43
mbed_official 113:65a335a675de 44 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 52:a51c77007319 45 if (pin == NC) return;
mbed_official 52:a51c77007319 46
mbed_official 76:aeb1df146756 47 uint32_t port_index = STM_PORT(pin);
mbed_official 52:a51c77007319 48
mbed_official 76:aeb1df146756 49 // Enable GPIO clock
mbed_official 76:aeb1df146756 50 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 84:f54042cbc282 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 76:aeb1df146756 52
mbed_official 52:a51c77007319 53 // Fill GPIO object structure for future use
mbed_official 52:a51c77007319 54 obj->pin = pin;
mbed_official 52:a51c77007319 55 obj->mask = gpio_set(pin);
mbed_official 52:a51c77007319 56 obj->reg_in = &gpio->IDR;
mbed_official 52:a51c77007319 57 obj->reg_set = &gpio->BSRR;
mbed_official 84:f54042cbc282 58 obj->reg_clr = &gpio->BRR;
mbed_official 52:a51c77007319 59 }
mbed_official 52:a51c77007319 60
mbed_official 52:a51c77007319 61 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 52:a51c77007319 62 pin_mode(obj->pin, mode);
mbed_official 52:a51c77007319 63 }
mbed_official 52:a51c77007319 64
mbed_official 52:a51c77007319 65 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 52:a51c77007319 66 if (direction == PIN_OUTPUT) {
mbed_official 52:a51c77007319 67 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_Out_PP, 0));
mbed_official 52:a51c77007319 68 }
mbed_official 52:a51c77007319 69 else { // PIN_INPUT
mbed_official 52:a51c77007319 70 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 52:a51c77007319 71 }
mbed_official 52:a51c77007319 72 }