Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F0/port_api.c@153:9398a535854b, 2016-12-22 (annotated)

Committer:
fwndz
Date:
Thu Dec 22 05:12:40 2016 +0000
Revision:
153:9398a535854b
Parent:
149:156823d33999 
device target maximize

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 *******************************************************************************
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2015, STMicroelectronics
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 12 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 13 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 15 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 16 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 17 *
<> 144:ef7eb2e8f9f7 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 28 *******************************************************************************
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30 #include "port_api.h"
<> 144:ef7eb2e8f9f7 31 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 32 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 33 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
<> 144:ef7eb2e8f9f7 40 // low nibble = pin number
<> 144:ef7eb2e8f9f7 41 PinName port_pin(PortName port, int pin_n) {
<> 144:ef7eb2e8f9f7 42 return (PinName)(pin_n + (port << 4));
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
<> 144:ef7eb2e8f9f7 46 uint32_t port_index = (uint32_t)port;
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 49 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 50 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 // Fill PORT object structure for future use
<> 144:ef7eb2e8f9f7 53 obj->port = port;
<> 144:ef7eb2e8f9f7 54 obj->mask = mask;
<> 144:ef7eb2e8f9f7 55 obj->direction = dir;
<> 144:ef7eb2e8f9f7 56 obj->reg_in = &gpio->IDR;
<> 144:ef7eb2e8f9f7 57 obj->reg_out = &gpio->ODR;
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 port_dir(obj, dir);
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 void port_dir(port_t *obj, PinDirection dir) {
<> 144:ef7eb2e8f9f7 63 uint32_t i;
<> 144:ef7eb2e8f9f7 64 obj->direction = dir;
<> 144:ef7eb2e8f9f7 65 for (i = 0; i < 16; i++) { // Process all pins
<> 144:ef7eb2e8f9f7 66 if (obj->mask & (1 << i)) { // If the pin is used
<> 144:ef7eb2e8f9f7 67 if (dir == PIN_OUTPUT) {
<> 144:ef7eb2e8f9f7 68 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
<> 144:ef7eb2e8f9f7 69 } else { // PIN_INPUT
<> 144:ef7eb2e8f9f7 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73 }
<> 144:ef7eb2e8f9f7 74 }
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 void port_mode(port_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 77 uint32_t i;
<> 144:ef7eb2e8f9f7 78 for (i = 0; i < 16; i++) { // Process all pins
<> 144:ef7eb2e8f9f7 79 if (obj->mask & (1 << i)) { // If the pin is used
<> 144:ef7eb2e8f9f7 80 pin_mode(port_pin(obj->port, i), mode);
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82 }
<> 144:ef7eb2e8f9f7 83 }
<> 144:ef7eb2e8f9f7 84
<> 144:ef7eb2e8f9f7 85 void port_write(port_t *obj, int value) {
<> 144:ef7eb2e8f9f7 86 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
<> 144:ef7eb2e8f9f7 87 }
<> 144:ef7eb2e8f9f7 88
<> 144:ef7eb2e8f9f7 89 int port_read(port_t *obj) {
<> 144:ef7eb2e8f9f7 90 if (obj->direction == PIN_OUTPUT) {
<> 144:ef7eb2e8f9f7 91 return (*obj->reg_out & obj->mask);
<> 144:ef7eb2e8f9f7 92 } else { // PIN_INPUT
<> 144:ef7eb2e8f9f7 93 return (*obj->reg_in & obj->mask);
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95 }
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 #endif