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_F303VC/port_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 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 *******************************************************************************
mbed_official 157:90e3acc479a2 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 4 * All rights reserved.
mbed_official 157:90e3acc479a2 5 *
mbed_official 157:90e3acc479a2 6 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 7 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 8 *
mbed_official 157:90e3acc479a2 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 10 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 13 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 15 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 16 * without specific prior written permission.
mbed_official 157:90e3acc479a2 17 *
mbed_official 157:90e3acc479a2 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 28 *******************************************************************************
mbed_official 157:90e3acc479a2 29 */
mbed_official 157:90e3acc479a2 30 #include "port_api.h"
mbed_official 241:ffe41b0c8126 31
mbed_official 241:ffe41b0c8126 32 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 241:ffe41b0c8126 33
mbed_official 157:90e3acc479a2 34 #include "pinmap.h"
mbed_official 157:90e3acc479a2 35 #include "gpio_api.h"
mbed_official 285:31249416b6f9 36 #include "mbed_error.h"
mbed_official 157:90e3acc479a2 37
mbed_official 157:90e3acc479a2 38 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 157:90e3acc479a2 39
mbed_official 157:90e3acc479a2 40 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 157:90e3acc479a2 41 // low nibble = pin number
mbed_official 157:90e3acc479a2 42 PinName port_pin(PortName port, int pin_n) {
mbed_official 157:90e3acc479a2 43 return (PinName)(pin_n + (port << 4));
mbed_official 157:90e3acc479a2 44 }
mbed_official 157:90e3acc479a2 45
mbed_official 157:90e3acc479a2 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
mbed_official 157:90e3acc479a2 47 uint32_t port_index = (uint32_t)port;
mbed_official 157:90e3acc479a2 48
mbed_official 157:90e3acc479a2 49 // Enable GPIO clock
mbed_official 157:90e3acc479a2 50 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 157:90e3acc479a2 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 157:90e3acc479a2 52
mbed_official 157:90e3acc479a2 53 // Fill PORT object structure for future use
mbed_official 157:90e3acc479a2 54 obj->port = port;
mbed_official 157:90e3acc479a2 55 obj->mask = mask;
mbed_official 157:90e3acc479a2 56 obj->direction = dir;
mbed_official 157:90e3acc479a2 57 obj->reg_in = &gpio->IDR;
mbed_official 157:90e3acc479a2 58 obj->reg_out = &gpio->ODR;
mbed_official 157:90e3acc479a2 59
mbed_official 157:90e3acc479a2 60 port_dir(obj, dir);
mbed_official 157:90e3acc479a2 61 }
mbed_official 157:90e3acc479a2 62
mbed_official 157:90e3acc479a2 63 void port_dir(port_t *obj, PinDirection dir) {
mbed_official 157:90e3acc479a2 64 uint32_t i;
mbed_official 157:90e3acc479a2 65 obj->direction = dir;
mbed_official 157:90e3acc479a2 66 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 157:90e3acc479a2 67 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 157:90e3acc479a2 68 if (dir == PIN_OUTPUT) {
mbed_official 157:90e3acc479a2 69 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 157:90e3acc479a2 70 } else { // PIN_INPUT
mbed_official 157:90e3acc479a2 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 157:90e3acc479a2 72 }
mbed_official 157:90e3acc479a2 73 }
mbed_official 157:90e3acc479a2 74 }
mbed_official 157:90e3acc479a2 75 }
mbed_official 157:90e3acc479a2 76
mbed_official 157:90e3acc479a2 77 void port_mode(port_t *obj, PinMode mode) {
mbed_official 157:90e3acc479a2 78 uint32_t i;
mbed_official 157:90e3acc479a2 79 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 157:90e3acc479a2 80 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 157:90e3acc479a2 81 pin_mode(port_pin(obj->port, i), mode);
mbed_official 157:90e3acc479a2 82 }
mbed_official 157:90e3acc479a2 83 }
mbed_official 157:90e3acc479a2 84 }
mbed_official 157:90e3acc479a2 85
mbed_official 157:90e3acc479a2 86 void port_write(port_t *obj, int value) {
mbed_official 157:90e3acc479a2 87 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 157:90e3acc479a2 88 }
mbed_official 157:90e3acc479a2 89
mbed_official 157:90e3acc479a2 90 int port_read(port_t *obj) {
mbed_official 157:90e3acc479a2 91 if (obj->direction == PIN_OUTPUT) {
mbed_official 157:90e3acc479a2 92 return (*obj->reg_out & obj->mask);
mbed_official 157:90e3acc479a2 93 } else { // PIN_INPUT
mbed_official 157:90e3acc479a2 94 return (*obj->reg_in & obj->mask);
mbed_official 157:90e3acc479a2 95 }
mbed_official 157:90e3acc479a2 96 }
mbed_official 157:90e3acc479a2 97
mbed_official 157:90e3acc479a2 98 #endif