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_DISCO_F051R8/port_api.c@130:1dec54e4aec3, 2014-03-21 (annotated)

Committer:
mbed_official
Date:
Fri Mar 21 11:45:09 2014 +0000
Revision:
130:1dec54e4aec3
Child:
240:9a7c54113eaf
Synchronized with git revision e5c9ff6781a4e277a5a454e5a0b037f76e31739d



Full URL: https://github.com/mbedmicro/mbed/commit/e5c9ff6781a4e277a5a454e5a0b037f76e31739d/



STM32F0-Discovery (STM32F051R8) initial port

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 130:1dec54e4aec3 1 /* mbed Microcontroller Library
mbed_official 130:1dec54e4aec3 2 *******************************************************************************
mbed_official 130:1dec54e4aec3 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 130:1dec54e4aec3 4 * All rights reserved.
mbed_official 130:1dec54e4aec3 5 *
mbed_official 130:1dec54e4aec3 6 * Redistribution and use in source and binary forms, with or without
mbed_official 130:1dec54e4aec3 7 * modification, are permitted provided that the following conditions are met:
mbed_official 130:1dec54e4aec3 8 *
mbed_official 130:1dec54e4aec3 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 130:1dec54e4aec3 10 * this list of conditions and the following disclaimer.
mbed_official 130:1dec54e4aec3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 130:1dec54e4aec3 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 130:1dec54e4aec3 13 * and/or other materials provided with the distribution.
mbed_official 130:1dec54e4aec3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 130:1dec54e4aec3 15 * may be used to endorse or promote products derived from this software
mbed_official 130:1dec54e4aec3 16 * without specific prior written permission.
mbed_official 130:1dec54e4aec3 17 *
mbed_official 130:1dec54e4aec3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 130:1dec54e4aec3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 130:1dec54e4aec3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 130:1dec54e4aec3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 130:1dec54e4aec3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 130:1dec54e4aec3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 130:1dec54e4aec3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 130:1dec54e4aec3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 130:1dec54e4aec3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 130:1dec54e4aec3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 130:1dec54e4aec3 28 *******************************************************************************
mbed_official 130:1dec54e4aec3 29 */
mbed_official 130:1dec54e4aec3 30 #include "port_api.h"
mbed_official 130:1dec54e4aec3 31 #include "pinmap.h"
mbed_official 130:1dec54e4aec3 32 #include "gpio_api.h"
mbed_official 130:1dec54e4aec3 33 #include "error.h"
mbed_official 130:1dec54e4aec3 34
mbed_official 130:1dec54e4aec3 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 130:1dec54e4aec3 36
mbed_official 130:1dec54e4aec3 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 130:1dec54e4aec3 38
mbed_official 130:1dec54e4aec3 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 130:1dec54e4aec3 40 // low nibble = pin number
mbed_official 130:1dec54e4aec3 41 PinName port_pin(PortName port, int pin_n) {
mbed_official 130:1dec54e4aec3 42 return (PinName)(pin_n + (port << 4));
mbed_official 130:1dec54e4aec3 43 }
mbed_official 130:1dec54e4aec3 44
mbed_official 130:1dec54e4aec3 45 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
mbed_official 130:1dec54e4aec3 46 uint32_t port_index = (uint32_t)port;
mbed_official 130:1dec54e4aec3 47
mbed_official 130:1dec54e4aec3 48 // Enable GPIO clock
mbed_official 130:1dec54e4aec3 49 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 130:1dec54e4aec3 50 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 130:1dec54e4aec3 51
mbed_official 130:1dec54e4aec3 52 // Fill PORT object structure for future use
mbed_official 130:1dec54e4aec3 53 obj->port = port;
mbed_official 130:1dec54e4aec3 54 obj->mask = mask;
mbed_official 130:1dec54e4aec3 55 obj->direction = dir;
mbed_official 130:1dec54e4aec3 56 obj->reg_in = &gpio->IDR;
mbed_official 130:1dec54e4aec3 57 obj->reg_out = &gpio->ODR;
mbed_official 130:1dec54e4aec3 58
mbed_official 130:1dec54e4aec3 59 port_dir(obj, dir);
mbed_official 130:1dec54e4aec3 60 }
mbed_official 130:1dec54e4aec3 61
mbed_official 130:1dec54e4aec3 62 void port_dir(port_t *obj, PinDirection dir) {
mbed_official 130:1dec54e4aec3 63 uint32_t i;
mbed_official 130:1dec54e4aec3 64 obj->direction = dir;
mbed_official 130:1dec54e4aec3 65 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 130:1dec54e4aec3 66 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 130:1dec54e4aec3 67 if (dir == PIN_OUTPUT) {
mbed_official 130:1dec54e4aec3 68 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 130:1dec54e4aec3 69 }
mbed_official 130:1dec54e4aec3 70 else { // PIN_INPUT
mbed_official 130:1dec54e4aec3 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 130:1dec54e4aec3 72 }
mbed_official 130:1dec54e4aec3 73 }
mbed_official 130:1dec54e4aec3 74 }
mbed_official 130:1dec54e4aec3 75 }
mbed_official 130:1dec54e4aec3 76
mbed_official 130:1dec54e4aec3 77 void port_mode(port_t *obj, PinMode mode) {
mbed_official 130:1dec54e4aec3 78 uint32_t i;
mbed_official 130:1dec54e4aec3 79 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 130:1dec54e4aec3 80 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 130:1dec54e4aec3 81 pin_mode(port_pin(obj->port, i), mode);
mbed_official 130:1dec54e4aec3 82 }
mbed_official 130:1dec54e4aec3 83 }
mbed_official 130:1dec54e4aec3 84 }
mbed_official 130:1dec54e4aec3 85
mbed_official 130:1dec54e4aec3 86 void port_write(port_t *obj, int value) {
mbed_official 130:1dec54e4aec3 87 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 130:1dec54e4aec3 88 }
mbed_official 130:1dec54e4aec3 89
mbed_official 130:1dec54e4aec3 90 int port_read(port_t *obj) {
mbed_official 130:1dec54e4aec3 91 if (obj->direction == PIN_OUTPUT) {
mbed_official 130:1dec54e4aec3 92 return (*obj->reg_out & obj->mask);
mbed_official 130:1dec54e4aec3 93 }
mbed_official 130:1dec54e4aec3 94 else { // PIN_INPUT
mbed_official 130:1dec54e4aec3 95 return (*obj->reg_in & obj->mask);
mbed_official 130:1dec54e4aec3 96 }
mbed_official 130:1dec54e4aec3 97 }
mbed_official 130:1dec54e4aec3 98
mbed_official 130:1dec54e4aec3 99 #endif