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_NUCLEO_L152RE/port_api.c@76:aeb1df146756, 2014-01-27 (annotated)

Committer:
mbed_official
Date:
Mon Jan 27 14:30:07 2014 +0000
Revision:
76:aeb1df146756
Child:
84:f54042cbc282
Synchronized with git revision a31ec9c5f7bcb5c8a1b2eced103f6a1dfa921abd



Full URL: https://github.com/mbedmicro/mbed/commit/a31ec9c5f7bcb5c8a1b2eced103f6a1dfa921abd/



Add NUCLEO_L152RE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include "port_api.h"
mbed_official 76:aeb1df146756 31 #include "pinmap.h"
mbed_official 76:aeb1df146756 32 #include "gpio_api.h"
mbed_official 76:aeb1df146756 33 #include "error.h"
mbed_official 76:aeb1df146756 34
mbed_official 76:aeb1df146756 35 #if DEVICE_PORTIN || DEVICE_PORTOUT
mbed_official 76:aeb1df146756 36
mbed_official 76:aeb1df146756 37 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 76:aeb1df146756 38
mbed_official 76:aeb1df146756 39 // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 76:aeb1df146756 40 // low nibble = pin number
mbed_official 76:aeb1df146756 41 PinName port_pin(PortName port, int pin_n) {
mbed_official 76:aeb1df146756 42 return (PinName)(pin_n + (port << 4));
mbed_official 76:aeb1df146756 43 }
mbed_official 76:aeb1df146756 44
mbed_official 76:aeb1df146756 45 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
mbed_official 76:aeb1df146756 46 GPIO_TypeDef *gpio;
mbed_official 76:aeb1df146756 47
mbed_official 76:aeb1df146756 48 uint32_t port_index = (uint32_t)port; // (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...)
mbed_official 76:aeb1df146756 49
mbed_official 76:aeb1df146756 50 // Enable GPIO clock
mbed_official 76:aeb1df146756 51 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 76:aeb1df146756 52 gpio = (GPIO_TypeDef *)gpio_add;
mbed_official 76:aeb1df146756 53
mbed_official 76:aeb1df146756 54 // Fill PORT object structure for future use
mbed_official 76:aeb1df146756 55 obj->port = port;
mbed_official 76:aeb1df146756 56 obj->mask = mask;
mbed_official 76:aeb1df146756 57 obj->direction = dir;
mbed_official 76:aeb1df146756 58 obj->reg_in = &gpio->IDR;
mbed_official 76:aeb1df146756 59 obj->reg_out = &gpio->ODR;
mbed_official 76:aeb1df146756 60
mbed_official 76:aeb1df146756 61 port_dir(obj, dir);
mbed_official 76:aeb1df146756 62 }
mbed_official 76:aeb1df146756 63
mbed_official 76:aeb1df146756 64 void port_dir(port_t *obj, PinDirection dir) {
mbed_official 76:aeb1df146756 65 uint32_t i;
mbed_official 76:aeb1df146756 66 obj->direction = dir;
mbed_official 76:aeb1df146756 67 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 76:aeb1df146756 68 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 76:aeb1df146756 69 if (dir == PIN_OUTPUT) {
mbed_official 76:aeb1df146756 70 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 76:aeb1df146756 71 }
mbed_official 76:aeb1df146756 72 else { // PIN_INPUT
mbed_official 76:aeb1df146756 73 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 76:aeb1df146756 74 }
mbed_official 76:aeb1df146756 75 }
mbed_official 76:aeb1df146756 76 }
mbed_official 76:aeb1df146756 77 }
mbed_official 76:aeb1df146756 78
mbed_official 76:aeb1df146756 79 void port_mode(port_t *obj, PinMode mode) {
mbed_official 76:aeb1df146756 80 uint32_t i;
mbed_official 76:aeb1df146756 81 for (i = 0; i < 16; i++) { // Process all pins
mbed_official 76:aeb1df146756 82 if (obj->mask & (1 << i)) { // If the pin is used
mbed_official 76:aeb1df146756 83 pin_mode(port_pin(obj->port, i), mode);
mbed_official 76:aeb1df146756 84 }
mbed_official 76:aeb1df146756 85 }
mbed_official 76:aeb1df146756 86 }
mbed_official 76:aeb1df146756 87
mbed_official 76:aeb1df146756 88 void port_write(port_t *obj, int value) {
mbed_official 76:aeb1df146756 89 *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
mbed_official 76:aeb1df146756 90 }
mbed_official 76:aeb1df146756 91
mbed_official 76:aeb1df146756 92 int port_read(port_t *obj) {
mbed_official 76:aeb1df146756 93 if (obj->direction == PIN_OUTPUT) {
mbed_official 76:aeb1df146756 94 return (*obj->reg_out & obj->mask);
mbed_official 76:aeb1df146756 95 }
mbed_official 76:aeb1df146756 96 else { // PIN_INPUT
mbed_official 76:aeb1df146756 97 return (*obj->reg_in & obj->mask);
mbed_official 76:aeb1df146756 98 }
mbed_official 76:aeb1df146756 99 }
mbed_official 76:aeb1df146756 100
mbed_official 76:aeb1df146756 101 #endif