SDK Development / mbed-src

mbed SDK library sources

Fork of mbed-src by mbed official

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/port_api.c@70:c1fbde68b492, 2014-01-07 (annotated)

Committer:
mbed_official
Date:
Tue Jan 07 11:00:05 2014 +0000
Revision:
70:c1fbde68b492
Parent:
52:a51c77007319
Child:
76:aeb1df146756
Synchronized with git revision 3f438a307904431f2782db3c8fa49946b9fc1d85



Full URL: https://github.com/mbedmicro/mbed/commit/3f438a307904431f2782db3c8fa49946b9fc1d85/



[NUCLEO_F103RB] license text changed + sleep hal updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 52:a51c77007319 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 52:a51c77007319 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 52:a51c77007319 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 52:a51c77007319 29 */
mbed_official 52:a51c77007319 30 #include "port_api.h"
mbed_official 52:a51c77007319 31 #include "pinmap.h"
mbed_official 52:a51c77007319 32 #include "gpio_api.h"
mbed_official 52:a51c77007319 33
mbed_official 52:a51c77007319 34 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 52:a51c77007319 35
mbed_official 52:a51c77007319 36 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 52:a51c77007319 37 // low nibble = pin number
mbed_official 52:a51c77007319 38 PinName port_pin(PortName port, int pin_n) {
mbed_official 52:a51c77007319 39 return (PinName)(pin_n + (port << 4));
mbed_official 52:a51c77007319 40 }
mbed_official 52:a51c77007319 41
mbed_official 52:a51c77007319 42 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
mbed_official 52:a51c77007319 43
mbed_official 52:a51c77007319 44 uint32_t port_index = (uint32_t)port; // (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 52:a51c77007319 45
mbed_official 52:a51c77007319 46 // Enable GPIO clock
mbed_official 52:a51c77007319 47 RCC_APB2PeriphClockCmd((RCC_APB2Periph_GPIOA << port_index), ENABLE);
mbed_official 52:a51c77007319 48
mbed_official 52:a51c77007319 49 // Get GPIO structure base address
mbed_official 52:a51c77007319 50 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(GPIOA_BASE + (port_index << 10));
mbed_official 52:a51c77007319 51
mbed_official 52:a51c77007319 52 // Fill PORT object structure for future use
mbed_official 52:a51c77007319 53 obj->port = port;
mbed_official 52:a51c77007319 54 obj->mask = mask;
mbed_official 52:a51c77007319 55 obj->direction = dir;
mbed_official 52:a51c77007319 56 obj->reg_in = &gpio->IDR;
mbed_official 52:a51c77007319 57 obj->reg_out = &gpio->ODR;
mbed_official 52:a51c77007319 58
mbed_official 52:a51c77007319 59 port_dir(obj, dir);
mbed_official 52:a51c77007319 60 }
mbed_official 52:a51c77007319 61
mbed_official 52:a51c77007319 62 void port_dir(port_t *obj, PinDirection dir) {
mbed_official 52:a51c77007319 63 uint32_t i;
mbed_official 52:a51c77007319 64 obj->direction = dir;
mbed_official 52:a51c77007319 65 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 52:a51c77007319 66 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 52:a51c77007319 67 if (dir == PIN_OUTPUT) {
mbed_official 52:a51c77007319 68 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_Out_PP, 0));
mbed_official 52:a51c77007319 69 }
mbed_official 52:a51c77007319 70 else { // PIN_INPUT
mbed_official 52:a51c77007319 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 52:a51c77007319 72 }
mbed_official 52:a51c77007319 73 }
mbed_official 52:a51c77007319 74 }
mbed_official 52:a51c77007319 75 }
mbed_official 52:a51c77007319 76
mbed_official 52:a51c77007319 77 void port_mode(port_t *obj, PinMode mode) {
mbed_official 52:a51c77007319 78 uint32_t i;
mbed_official 52:a51c77007319 79 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 52:a51c77007319 80 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 52:a51c77007319 81 pin_mode(port_pin(obj->port, i), mode);
mbed_official 52:a51c77007319 82 }
mbed_official 52:a51c77007319 83 }
mbed_official 52:a51c77007319 84 }
mbed_official 52:a51c77007319 85
mbed_official 52:a51c77007319 86 void port_write(port_t *obj, int value) {
mbed_official 52:a51c77007319 87 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 52:a51c77007319 88 }
mbed_official 52:a51c77007319 89
mbed_official 52:a51c77007319 90 int port_read(port_t *obj) {
mbed_official 52:a51c77007319 91 if (obj->direction == PIN_OUTPUT) {
mbed_official 52:a51c77007319 92 return (*obj->reg_out & obj->mask);
mbed_official 52:a51c77007319 93 }
mbed_official 52:a51c77007319 94 else { // PIN_INPUT
mbed_official 52:a51c77007319 95 return (*obj->reg_in & obj->mask);
mbed_official 52:a51c77007319 96 }
mbed_official 52:a51c77007319 97 }
mbed_official 52:a51c77007319 98
mbed_official 52:a51c77007319 99 #endif