shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F334R8/gpio_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
285:31249416b6f9 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /* mbed Microcontroller Library
mbed_official 237:f3da66175598 2 *******************************************************************************
mbed_official 237:f3da66175598 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 237:f3da66175598 4 * All rights reserved.
mbed_official 237:f3da66175598 5 *
mbed_official 237:f3da66175598 6 * Redistribution and use in source and binary forms, with or without
mbed_official 237:f3da66175598 7 * modification, are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 8 *
mbed_official 237:f3da66175598 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 10 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 13 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 15 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 16 * without specific prior written permission.
mbed_official 237:f3da66175598 17 *
mbed_official 237:f3da66175598 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 28 *******************************************************************************
mbed_official 237:f3da66175598 29 */
mbed_official 237:f3da66175598 30 #include "mbed_assert.h"
mbed_official 237:f3da66175598 31 #include "gpio_api.h"
mbed_official 237:f3da66175598 32 #include "pinmap.h"
mbed_official 285:31249416b6f9 33 #include "mbed_error.h"
mbed_official 237:f3da66175598 34
mbed_official 237:f3da66175598 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 237:f3da66175598 36
mbed_official 237:f3da66175598 37 uint32_t gpio_set(PinName pin)
mbed_official 237:f3da66175598 38 {
mbed_official 237:f3da66175598 39 MBED_ASSERT(pin != (PinName)NC);
mbed_official 237:f3da66175598 40
mbed_official 237:f3da66175598 41 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 42
mbed_official 237:f3da66175598 43 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
mbed_official 237:f3da66175598 44 }
mbed_official 237:f3da66175598 45
mbed_official 237:f3da66175598 46 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 237:f3da66175598 47 {
mbed_official 237:f3da66175598 48 obj->pin = pin;
mbed_official 237:f3da66175598 49 if (pin == (PinName)NC) {
mbed_official 237:f3da66175598 50 return;
mbed_official 237:f3da66175598 51 }
mbed_official 237:f3da66175598 52
mbed_official 237:f3da66175598 53 uint32_t port_index = STM_PORT(pin);
mbed_official 237:f3da66175598 54
mbed_official 237:f3da66175598 55 // Enable GPIO clock
mbed_official 237:f3da66175598 56 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 237:f3da66175598 57 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 237:f3da66175598 58
mbed_official 237:f3da66175598 59 // Fill GPIO object structure for future use
mbed_official 237:f3da66175598 60 obj->mask = gpio_set(pin);
mbed_official 237:f3da66175598 61 obj->reg_in = &gpio->IDR;
mbed_official 237:f3da66175598 62 obj->reg_set = &gpio->BSRRL;
mbed_official 237:f3da66175598 63 obj->reg_clr = &gpio->BSRRH;
mbed_official 237:f3da66175598 64 }
mbed_official 237:f3da66175598 65
mbed_official 237:f3da66175598 66 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 237:f3da66175598 67 {
mbed_official 237:f3da66175598 68 pin_mode(obj->pin, mode);
mbed_official 237:f3da66175598 69 }
mbed_official 237:f3da66175598 70
mbed_official 237:f3da66175598 71 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 237:f3da66175598 72 {
mbed_official 237:f3da66175598 73 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 237:f3da66175598 74 if (direction == PIN_OUTPUT) {
mbed_official 237:f3da66175598 75 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 76 } else { // PIN_INPUT
mbed_official 237:f3da66175598 77 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 78 }
mbed_official 237:f3da66175598 79 }