Stuart Northfield / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F334C8/port_api.c@381:5460fc57b6e4, 2014-11-03 (annotated)

Committer:
mbed_official
Date:
Mon Nov 03 10:30:07 2014 +0000
Revision:
381:5460fc57b6e4
Synchronized with git revision 02478cd1f27fc7b9643486472635eb515b2bca81



Full URL: https://github.com/mbedmicro/mbed/commit/02478cd1f27fc7b9643486472635eb515b2bca81/



Target: LPC1549 - Fix serial interrupt issues (issue report #616)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 381:5460fc57b6e4 1 /* mbed Microcontroller Library
mbed_official 381:5460fc57b6e4 2 *******************************************************************************
mbed_official 381:5460fc57b6e4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 381:5460fc57b6e4 4 * All rights reserved.
mbed_official 381:5460fc57b6e4 5 *
mbed_official 381:5460fc57b6e4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 381:5460fc57b6e4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 381:5460fc57b6e4 8 *
mbed_official 381:5460fc57b6e4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 381:5460fc57b6e4 10 * this list of conditions and the following disclaimer.
mbed_official 381:5460fc57b6e4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 381:5460fc57b6e4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 381:5460fc57b6e4 13 * and/or other materials provided with the distribution.
mbed_official 381:5460fc57b6e4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 381:5460fc57b6e4 15 * may be used to endorse or promote products derived from this software
mbed_official 381:5460fc57b6e4 16 * without specific prior written permission.
mbed_official 381:5460fc57b6e4 17 *
mbed_official 381:5460fc57b6e4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 381:5460fc57b6e4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 381:5460fc57b6e4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 381:5460fc57b6e4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 381:5460fc57b6e4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 381:5460fc57b6e4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 381:5460fc57b6e4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 381:5460fc57b6e4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 381:5460fc57b6e4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 381:5460fc57b6e4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 381:5460fc57b6e4 28 *******************************************************************************
mbed_official 381:5460fc57b6e4 29 */
mbed_official 381:5460fc57b6e4 30 #include "port_api.h"
mbed_official 381:5460fc57b6e4 31 #include "pinmap.h"
mbed_official 381:5460fc57b6e4 32 #include "gpio_api.h"
mbed_official 381:5460fc57b6e4 33 #include "mbed_error.h"
mbed_official 381:5460fc57b6e4 34
mbed_official 381:5460fc57b6e4 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 381:5460fc57b6e4 36
mbed_official 381:5460fc57b6e4 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 381:5460fc57b6e4 38
mbed_official 381:5460fc57b6e4 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 381:5460fc57b6e4 40 // low nibble = pin number
mbed_official 381:5460fc57b6e4 41 PinName port_pin(PortName port, int pin_n)
mbed_official 381:5460fc57b6e4 42 {
mbed_official 381:5460fc57b6e4 43 return (PinName)(pin_n + (port << 4));
mbed_official 381:5460fc57b6e4 44 }
mbed_official 381:5460fc57b6e4 45
mbed_official 381:5460fc57b6e4 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
mbed_official 381:5460fc57b6e4 47 {
mbed_official 381:5460fc57b6e4 48 uint32_t port_index = (uint32_t)port;
mbed_official 381:5460fc57b6e4 49
mbed_official 381:5460fc57b6e4 50 // Enable GPIO clock
mbed_official 381:5460fc57b6e4 51 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 381:5460fc57b6e4 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 381:5460fc57b6e4 53
mbed_official 381:5460fc57b6e4 54 // Fill PORT object structure for future use
mbed_official 381:5460fc57b6e4 55 obj->port = port;
mbed_official 381:5460fc57b6e4 56 obj->mask = mask;
mbed_official 381:5460fc57b6e4 57 obj->direction = dir;
mbed_official 381:5460fc57b6e4 58 obj->reg_in = &gpio->IDR;
mbed_official 381:5460fc57b6e4 59 obj->reg_out = &gpio->ODR;
mbed_official 381:5460fc57b6e4 60
mbed_official 381:5460fc57b6e4 61 port_dir(obj, dir);
mbed_official 381:5460fc57b6e4 62 }
mbed_official 381:5460fc57b6e4 63
mbed_official 381:5460fc57b6e4 64 void port_dir(port_t *obj, PinDirection dir)
mbed_official 381:5460fc57b6e4 65 {
mbed_official 381:5460fc57b6e4 66 uint32_t i;
mbed_official 381:5460fc57b6e4 67 obj->direction = dir;
mbed_official 381:5460fc57b6e4 68 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 381:5460fc57b6e4 69 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 381:5460fc57b6e4 70 if (dir == PIN_OUTPUT) {
mbed_official 381:5460fc57b6e4 71 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
mbed_official 381:5460fc57b6e4 72 } else { // PIN_INPUT
mbed_official 381:5460fc57b6e4 73 pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 381:5460fc57b6e4 74 }
mbed_official 381:5460fc57b6e4 75 }
mbed_official 381:5460fc57b6e4 76 }
mbed_official 381:5460fc57b6e4 77 }
mbed_official 381:5460fc57b6e4 78
mbed_official 381:5460fc57b6e4 79 void port_mode(port_t *obj, PinMode mode)
mbed_official 381:5460fc57b6e4 80 {
mbed_official 381:5460fc57b6e4 81 uint32_t i;
mbed_official 381:5460fc57b6e4 82 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 381:5460fc57b6e4 83 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 381:5460fc57b6e4 84 pin_mode(port_pin(obj->port, i), mode);
mbed_official 381:5460fc57b6e4 85 }
mbed_official 381:5460fc57b6e4 86 }
mbed_official 381:5460fc57b6e4 87 }
mbed_official 381:5460fc57b6e4 88
mbed_official 381:5460fc57b6e4 89 void port_write(port_t *obj, int value)
mbed_official 381:5460fc57b6e4 90 {
mbed_official 381:5460fc57b6e4 91 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 381:5460fc57b6e4 92 }
mbed_official 381:5460fc57b6e4 93
mbed_official 381:5460fc57b6e4 94 int port_read(port_t *obj)
mbed_official 381:5460fc57b6e4 95 {
mbed_official 381:5460fc57b6e4 96 if (obj->direction == PIN_OUTPUT) {
mbed_official 381:5460fc57b6e4 97 return (*obj->reg_out & obj->mask);
mbed_official 381:5460fc57b6e4 98 } else { // PIN_INPUT
mbed_official 381:5460fc57b6e4 99 return (*obj->reg_in & obj->mask);
mbed_official 381:5460fc57b6e4 100 }
mbed_official 381:5460fc57b6e4 101 }
mbed_official 381:5460fc57b6e4 102
mbed_official 381:5460fc57b6e4 103 #endif