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targets/hal/TARGET_STM/TARGET_STM32L4/gpio_api.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 610:813dcc80987e 1 /* mbed Microcontroller Library
mbed_official 610:813dcc80987e 2 *******************************************************************************
mbed_official 610:813dcc80987e 3 * Copyright (c) 2015, STMicroelectronics
mbed_official 610:813dcc80987e 4 * All rights reserved.
mbed_official 610:813dcc80987e 5 *
mbed_official 610:813dcc80987e 6 * Redistribution and use in source and binary forms, with or without
mbed_official 610:813dcc80987e 7 * modification, are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 8 *
mbed_official 610:813dcc80987e 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 10 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 13 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 15 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 16 * without specific prior written permission.
mbed_official 610:813dcc80987e 17 *
mbed_official 610:813dcc80987e 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 28 *******************************************************************************
mbed_official 610:813dcc80987e 29 */
mbed_official 610:813dcc80987e 30 #include "mbed_assert.h"
mbed_official 610:813dcc80987e 31 #include "gpio_api.h"
mbed_official 610:813dcc80987e 32 #include "pinmap.h"
mbed_official 610:813dcc80987e 33 #include "mbed_error.h"
mbed_official 610:813dcc80987e 34
mbed_official 610:813dcc80987e 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 610:813dcc80987e 36
mbed_official 610:813dcc80987e 37 uint32_t gpio_set(PinName pin)
mbed_official 610:813dcc80987e 38 {
mbed_official 610:813dcc80987e 39 MBED_ASSERT(pin != (PinName)NC);
mbed_official 610:813dcc80987e 40
mbed_official 610:813dcc80987e 41 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 610:813dcc80987e 42 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 610:813dcc80987e 43 }
mbed_official 610:813dcc80987e 44
mbed_official 610:813dcc80987e 45 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 610:813dcc80987e 46 {
mbed_official 610:813dcc80987e 47 obj->pin = pin;
mbed_official 610:813dcc80987e 48 if (pin == (PinName)NC)
mbed_official 610:813dcc80987e 49 return;
mbed_official 610:813dcc80987e 50
mbed_official 610:813dcc80987e 51 uint32_t port_index = STM_PORT(pin);
mbed_official 610:813dcc80987e 52
mbed_official 610:813dcc80987e 53 // Enable GPIO clock
mbed_official 610:813dcc80987e 54 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 610:813dcc80987e 55 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 610:813dcc80987e 56
mbed_official 610:813dcc80987e 57 // Fill GPIO object structure for future use
mbed_official 610:813dcc80987e 58 obj->mask = gpio_set(pin);
mbed_official 610:813dcc80987e 59 obj->reg_in = &gpio->IDR;
mbed_official 610:813dcc80987e 60 obj->reg_set = &gpio->BSRR;
mbed_official 610:813dcc80987e 61 obj->reg_clr = &gpio->BRR;
mbed_official 610:813dcc80987e 62 }
mbed_official 610:813dcc80987e 63
mbed_official 610:813dcc80987e 64 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 610:813dcc80987e 65 {
mbed_official 610:813dcc80987e 66 pin_mode(obj->pin, mode);
mbed_official 610:813dcc80987e 67 }
mbed_official 610:813dcc80987e 68
mbed_official 610:813dcc80987e 69 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 610:813dcc80987e 70 {
mbed_official 610:813dcc80987e 71 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 610:813dcc80987e 72 if (direction == PIN_OUTPUT) {
mbed_official 610:813dcc80987e 73 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 610:813dcc80987e 74 } else { // PIN_INPUT
mbed_official 610:813dcc80987e 75 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 610:813dcc80987e 76 }
mbed_official 610:813dcc80987e 77 }