gabriel della-monica / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_L053C8/gpio_api.c@439:c4382fcbbaed, 2014-12-15 (annotated)

Committer:
mbed_official
Date:
Mon Dec 15 09:30:07 2014 +0000
Revision:
439:c4382fcbbaed
Parent:
376:cb4d9db17537 
Synchronized with git revision 6172cbea1a558a9a2ebbd965e77f83a9ceeec670



Full URL: https://github.com/mbedmicro/mbed/commit/6172cbea1a558a9a2ebbd965e77f83a9ceeec670/



Targets: DISCO_L053C8 - update from nucleo latest changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 376:cb4d9db17537 1 /* mbed Microcontroller Library
mbed_official 376:cb4d9db17537 2 *******************************************************************************
mbed_official 376:cb4d9db17537 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 376:cb4d9db17537 4 * All rights reserved.
mbed_official 376:cb4d9db17537 5 *
mbed_official 376:cb4d9db17537 6 * Redistribution and use in source and binary forms, with or without
mbed_official 376:cb4d9db17537 7 * modification, are permitted provided that the following conditions are met:
mbed_official 376:cb4d9db17537 8 *
mbed_official 376:cb4d9db17537 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 376:cb4d9db17537 10 * this list of conditions and the following disclaimer.
mbed_official 376:cb4d9db17537 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 376:cb4d9db17537 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 376:cb4d9db17537 13 * and/or other materials provided with the distribution.
mbed_official 376:cb4d9db17537 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 376:cb4d9db17537 15 * may be used to endorse or promote products derived from this software
mbed_official 376:cb4d9db17537 16 * without specific prior written permission.
mbed_official 376:cb4d9db17537 17 *
mbed_official 376:cb4d9db17537 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 376:cb4d9db17537 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 376:cb4d9db17537 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 376:cb4d9db17537 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 376:cb4d9db17537 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 376:cb4d9db17537 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 376:cb4d9db17537 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 376:cb4d9db17537 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 376:cb4d9db17537 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 376:cb4d9db17537 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 376:cb4d9db17537 28 *******************************************************************************
mbed_official 376:cb4d9db17537 29 */
mbed_official 376:cb4d9db17537 30 #include "mbed_assert.h"
mbed_official 376:cb4d9db17537 31 #include "gpio_api.h"
mbed_official 376:cb4d9db17537 32 #include "pinmap.h"
mbed_official 376:cb4d9db17537 33 #include "mbed_error.h"
mbed_official 376:cb4d9db17537 34
mbed_official 376:cb4d9db17537 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 376:cb4d9db17537 36
mbed_official 439:c4382fcbbaed 37 uint32_t gpio_set(PinName pin)
mbed_official 439:c4382fcbbaed 38 {
mbed_official 376:cb4d9db17537 39 MBED_ASSERT(pin != (PinName)NC);
mbed_official 376:cb4d9db17537 40
mbed_official 376:cb4d9db17537 41 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 42 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 376:cb4d9db17537 43 }
mbed_official 376:cb4d9db17537 44
mbed_official 439:c4382fcbbaed 45 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 439:c4382fcbbaed 46 {
mbed_official 376:cb4d9db17537 47 obj->pin = pin;
mbed_official 376:cb4d9db17537 48 if (pin == (PinName)NC)
mbed_official 376:cb4d9db17537 49 return;
mbed_official 376:cb4d9db17537 50
mbed_official 376:cb4d9db17537 51 uint32_t port_index = STM_PORT(pin);
mbed_official 376:cb4d9db17537 52
mbed_official 376:cb4d9db17537 53 // Enable GPIO clock
mbed_official 376:cb4d9db17537 54 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 376:cb4d9db17537 55 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 376:cb4d9db17537 56
mbed_official 376:cb4d9db17537 57 // Fill GPIO object structure for future use
mbed_official 376:cb4d9db17537 58 obj->mask = gpio_set(pin);
mbed_official 376:cb4d9db17537 59 obj->reg_in = &gpio->IDR;
mbed_official 376:cb4d9db17537 60 obj->reg_set = &gpio->BSRR;
mbed_official 376:cb4d9db17537 61 obj->reg_clr = &gpio->BRR;
mbed_official 376:cb4d9db17537 62 }
mbed_official 376:cb4d9db17537 63
mbed_official 439:c4382fcbbaed 64 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 439:c4382fcbbaed 65 {
mbed_official 376:cb4d9db17537 66 pin_mode(obj->pin, mode);
mbed_official 376:cb4d9db17537 67 }
mbed_official 376:cb4d9db17537 68
mbed_official 439:c4382fcbbaed 69 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 439:c4382fcbbaed 70 {
mbed_official 376:cb4d9db17537 71 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 376:cb4d9db17537 72 if (direction == PIN_OUTPUT) {
mbed_official 376:cb4d9db17537 73 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 74 } else { // PIN_INPUT
mbed_official 376:cb4d9db17537 75 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 76 }
mbed_official 376:cb4d9db17537 77 }