gabriel della-monica / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_L053C8/port_api.c@376:cb4d9db17537, 2014-10-31 (annotated)

Committer:
mbed_official
Date:
Fri Oct 31 11:00:10 2014 +0000
Revision:
376:cb4d9db17537
Child:
439:c4382fcbbaed
Synchronized with git revision 07b49da75eac883fc8916d3d6b6962664b8db29e



Full URL: https://github.com/mbedmicro/mbed/commit/07b49da75eac883fc8916d3d6b6962664b8db29e/



Targets: DISCO_L053C8 - new platform - STM32L0 Discovery board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 376:cb4d9db17537 1 /* mbed Microcontroller Library
mbed_official 376:cb4d9db17537 2 *******************************************************************************
mbed_official 376:cb4d9db17537 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 376:cb4d9db17537 4 * All rights reserved.
mbed_official 376:cb4d9db17537 5 *
mbed_official 376:cb4d9db17537 6 * Redistribution and use in source and binary forms, with or without
mbed_official 376:cb4d9db17537 7 * modification, are permitted provided that the following conditions are met:
mbed_official 376:cb4d9db17537 8 *
mbed_official 376:cb4d9db17537 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 376:cb4d9db17537 10 * this list of conditions and the following disclaimer.
mbed_official 376:cb4d9db17537 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 376:cb4d9db17537 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 376:cb4d9db17537 13 * and/or other materials provided with the distribution.
mbed_official 376:cb4d9db17537 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 376:cb4d9db17537 15 * may be used to endorse or promote products derived from this software
mbed_official 376:cb4d9db17537 16 * without specific prior written permission.
mbed_official 376:cb4d9db17537 17 *
mbed_official 376:cb4d9db17537 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 376:cb4d9db17537 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 376:cb4d9db17537 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 376:cb4d9db17537 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 376:cb4d9db17537 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 376:cb4d9db17537 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 376:cb4d9db17537 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 376:cb4d9db17537 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 376:cb4d9db17537 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 376:cb4d9db17537 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 376:cb4d9db17537 28 *******************************************************************************
mbed_official 376:cb4d9db17537 29 */
mbed_official 376:cb4d9db17537 30 #include "port_api.h"
mbed_official 376:cb4d9db17537 31 #include "pinmap.h"
mbed_official 376:cb4d9db17537 32 #include "gpio_api.h"
mbed_official 376:cb4d9db17537 33 #include "mbed_error.h"
mbed_official 376:cb4d9db17537 34
mbed_official 376:cb4d9db17537 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 376:cb4d9db17537 36
mbed_official 376:cb4d9db17537 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 376:cb4d9db17537 38
mbed_official 376:cb4d9db17537 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 376:cb4d9db17537 40 // low nibble = pin number
mbed_official 376:cb4d9db17537 41 PinName port_pin(PortName port, int pin_n) {
mbed_official 376:cb4d9db17537 42 return (PinName)(pin_n + (port << 4));
mbed_official 376:cb4d9db17537 43 }
mbed_official 376:cb4d9db17537 44
mbed_official 376:cb4d9db17537 45 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
mbed_official 376:cb4d9db17537 46 uint32_t port_index = (uint32_t)port;
mbed_official 376:cb4d9db17537 47
mbed_official 376:cb4d9db17537 48 // Enable GPIO clock
mbed_official 376:cb4d9db17537 49 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 376:cb4d9db17537 50 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 376:cb4d9db17537 51
mbed_official 376:cb4d9db17537 52 // Fill PORT object structure for future use
mbed_official 376:cb4d9db17537 53 obj->port = port;
mbed_official 376:cb4d9db17537 54 obj->mask = mask;
mbed_official 376:cb4d9db17537 55 obj->direction = dir;
mbed_official 376:cb4d9db17537 56 obj->reg_in = &gpio->IDR;
mbed_official 376:cb4d9db17537 57 obj->reg_out = &gpio->ODR;
mbed_official 376:cb4d9db17537 58
mbed_official 376:cb4d9db17537 59 port_dir(obj, dir);
mbed_official 376:cb4d9db17537 60 }
mbed_official 376:cb4d9db17537 61
mbed_official 376:cb4d9db17537 62 void port_dir(port_t *obj, PinDirection dir) {
mbed_official 376:cb4d9db17537 63 uint32_t i;
mbed_official 376:cb4d9db17537 64 obj->direction = dir;
mbed_official 376:cb4d9db17537 65 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 376:cb4d9db17537 66 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 376:cb4d9db17537 67 if (dir == PIN_OUTPUT) {
mbed_official 376:cb4d9db17537 68 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 69 } else { // PIN_INPUT
mbed_official 376:cb4d9db17537 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 71 }
mbed_official 376:cb4d9db17537 72 }
mbed_official 376:cb4d9db17537 73 }
mbed_official 376:cb4d9db17537 74 }
mbed_official 376:cb4d9db17537 75
mbed_official 376:cb4d9db17537 76 void port_mode(port_t *obj, PinMode mode) {
mbed_official 376:cb4d9db17537 77 uint32_t i;
mbed_official 376:cb4d9db17537 78 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 376:cb4d9db17537 79 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 376:cb4d9db17537 80 pin_mode(port_pin(obj->port, i), mode);
mbed_official 376:cb4d9db17537 81 }
mbed_official 376:cb4d9db17537 82 }
mbed_official 376:cb4d9db17537 83 }
mbed_official 376:cb4d9db17537 84
mbed_official 376:cb4d9db17537 85 void port_write(port_t *obj, int value) {
mbed_official 376:cb4d9db17537 86 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 376:cb4d9db17537 87 }
mbed_official 376:cb4d9db17537 88
mbed_official 376:cb4d9db17537 89 int port_read(port_t *obj) {
mbed_official 376:cb4d9db17537 90 if (obj->direction == PIN_OUTPUT) {
mbed_official 376:cb4d9db17537 91 return (*obj->reg_out & obj->mask);
mbed_official 376:cb4d9db17537 92 } else { // PIN_INPUT
mbed_official 376:cb4d9db17537 93 return (*obj->reg_in & obj->mask);
mbed_official 376:cb4d9db17537 94 }
mbed_official 376:cb4d9db17537 95 }
mbed_official 376:cb4d9db17537 96
mbed_official 376:cb4d9db17537 97 #endif