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_F030R8/gpio_irq_api.c@156:38b9eb24e1d1, 2014-04-11 (annotated)

Committer:
mbed_official
Date:
Fri Apr 11 00:30:06 2014 +0100
Revision:
156:38b9eb24e1d1
Parent:
84:f54042cbc282
Child:
216:577900467c9e
Synchronized with git revision 0356bc49c0096cd3b3f15222e147af3e51211ea1



Full URL: https://github.com/mbedmicro/mbed/commit/0356bc49c0096cd3b3f15222e147af3e51211ea1/



[NUCLEO_xxx] Add more interrupt_in pins

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 77:b5886236e6f0 1 /* mbed Microcontroller Library
mbed_official 77:b5886236e6f0 2 *******************************************************************************
mbed_official 77:b5886236e6f0 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 77:b5886236e6f0 4 * All rights reserved.
mbed_official 77:b5886236e6f0 5 *
mbed_official 77:b5886236e6f0 6 * Redistribution and use in source and binary forms, with or without
mbed_official 77:b5886236e6f0 7 * modification, are permitted provided that the following conditions are met:
mbed_official 77:b5886236e6f0 8 *
mbed_official 77:b5886236e6f0 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 77:b5886236e6f0 10 * this list of conditions and the following disclaimer.
mbed_official 77:b5886236e6f0 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 77:b5886236e6f0 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 77:b5886236e6f0 13 * and/or other materials provided with the distribution.
mbed_official 77:b5886236e6f0 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 77:b5886236e6f0 15 * may be used to endorse or promote products derived from this software
mbed_official 77:b5886236e6f0 16 * without specific prior written permission.
mbed_official 77:b5886236e6f0 17 *
mbed_official 77:b5886236e6f0 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 77:b5886236e6f0 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 77:b5886236e6f0 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 77:b5886236e6f0 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 77:b5886236e6f0 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 77:b5886236e6f0 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 77:b5886236e6f0 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 77:b5886236e6f0 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 77:b5886236e6f0 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 77:b5886236e6f0 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 77:b5886236e6f0 28 *******************************************************************************
mbed_official 77:b5886236e6f0 29 */
mbed_official 77:b5886236e6f0 30 #include <stddef.h>
mbed_official 77:b5886236e6f0 31 #include "cmsis.h"
mbed_official 77:b5886236e6f0 32
mbed_official 77:b5886236e6f0 33 #include "gpio_irq_api.h"
mbed_official 77:b5886236e6f0 34 #include "pinmap.h"
mbed_official 77:b5886236e6f0 35 #include "error.h"
mbed_official 77:b5886236e6f0 36
mbed_official 77:b5886236e6f0 37 #define EDGE_NONE (0)
mbed_official 77:b5886236e6f0 38 #define EDGE_RISE (1)
mbed_official 77:b5886236e6f0 39 #define EDGE_FALL (2)
mbed_official 77:b5886236e6f0 40 #define EDGE_BOTH (3)
mbed_official 77:b5886236e6f0 41
mbed_official 77:b5886236e6f0 42 #define CHANNEL_NUM (3)
mbed_official 77:b5886236e6f0 43
mbed_official 77:b5886236e6f0 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0};
mbed_official 77:b5886236e6f0 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0};
mbed_official 77:b5886236e6f0 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0};
mbed_official 77:b5886236e6f0 47
mbed_official 77:b5886236e6f0 48 static gpio_irq_handler irq_handler;
mbed_official 77:b5886236e6f0 49
mbed_official 77:b5886236e6f0 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 77:b5886236e6f0 51 // Retrieve the gpio and pin that generate the irq
mbed_official 77:b5886236e6f0 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 77:b5886236e6f0 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 156:38b9eb24e1d1 54
mbed_official 77:b5886236e6f0 55 // Clear interrupt flag
mbed_official 77:b5886236e6f0 56 if (EXTI_GetITStatus(pin) != RESET)
mbed_official 77:b5886236e6f0 57 {
mbed_official 77:b5886236e6f0 58 EXTI_ClearITPendingBit(pin);
mbed_official 77:b5886236e6f0 59 }
mbed_official 77:b5886236e6f0 60
mbed_official 77:b5886236e6f0 61 if (channel_ids[irq_index] == 0) return;
mbed_official 77:b5886236e6f0 62
mbed_official 77:b5886236e6f0 63 // Check which edge has generated the irq
mbed_official 77:b5886236e6f0 64 if ((gpio->IDR & pin) == 0) {
mbed_official 77:b5886236e6f0 65 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 77:b5886236e6f0 66 }
mbed_official 77:b5886236e6f0 67 else {
mbed_official 77:b5886236e6f0 68 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 77:b5886236e6f0 69 }
mbed_official 77:b5886236e6f0 70 }
mbed_official 77:b5886236e6f0 71
mbed_official 77:b5886236e6f0 72 // The irq_index is passed to the function
mbed_official 77:b5886236e6f0 73 static void gpio_irq0(void) {handle_interrupt_in(0);}
mbed_official 77:b5886236e6f0 74 static void gpio_irq1(void) {handle_interrupt_in(1);}
mbed_official 77:b5886236e6f0 75 static void gpio_irq2(void) {handle_interrupt_in(2);}
mbed_official 77:b5886236e6f0 76
mbed_official 77:b5886236e6f0 77 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 77:b5886236e6f0 78
mbed_official 77:b5886236e6f0 79 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 77:b5886236e6f0 80 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 77:b5886236e6f0 81 uint32_t vector = 0;
mbed_official 77:b5886236e6f0 82 uint32_t irq_index;
mbed_official 77:b5886236e6f0 83
mbed_official 77:b5886236e6f0 84 if (pin == NC) return -1;
mbed_official 77:b5886236e6f0 85
mbed_official 77:b5886236e6f0 86 uint32_t port_index = STM_PORT(pin);
mbed_official 77:b5886236e6f0 87 uint32_t pin_index = STM_PIN(pin);
mbed_official 77:b5886236e6f0 88
mbed_official 77:b5886236e6f0 89 // Select irq number and interrupt routine
mbed_official 156:38b9eb24e1d1 90 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 156:38b9eb24e1d1 91 irq_n = EXTI0_1_IRQn;
mbed_official 156:38b9eb24e1d1 92 vector = (uint32_t)&gpio_irq0;
mbed_official 156:38b9eb24e1d1 93 irq_index = 0;
mbed_official 156:38b9eb24e1d1 94 }
mbed_official 156:38b9eb24e1d1 95 else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 156:38b9eb24e1d1 96 irq_n = EXTI2_3_IRQn;
mbed_official 156:38b9eb24e1d1 97 vector = (uint32_t)&gpio_irq1;
mbed_official 156:38b9eb24e1d1 98 irq_index = 1;
mbed_official 156:38b9eb24e1d1 99 }
mbed_official 156:38b9eb24e1d1 100 else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 156:38b9eb24e1d1 101 irq_n = EXTI4_15_IRQn;
mbed_official 156:38b9eb24e1d1 102 vector = (uint32_t)&gpio_irq2;
mbed_official 156:38b9eb24e1d1 103 irq_index = 2;
mbed_official 156:38b9eb24e1d1 104 }
mbed_official 156:38b9eb24e1d1 105 else {
mbed_official 156:38b9eb24e1d1 106 error("InterruptIn error: pin not supported.\n");
mbed_official 156:38b9eb24e1d1 107 return -1;
mbed_official 77:b5886236e6f0 108 }
mbed_official 77:b5886236e6f0 109
mbed_official 77:b5886236e6f0 110 // Enable GPIO clock
mbed_official 77:b5886236e6f0 111 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 77:b5886236e6f0 112
mbed_official 77:b5886236e6f0 113 // Enable SYSCFG clock
mbed_official 77:b5886236e6f0 114 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 77:b5886236e6f0 115
mbed_official 77:b5886236e6f0 116 // Connect EXTI line to pin
mbed_official 77:b5886236e6f0 117 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 77:b5886236e6f0 118
mbed_official 77:b5886236e6f0 119 // Configure EXTI line
mbed_official 77:b5886236e6f0 120 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 121 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 77:b5886236e6f0 122 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 77:b5886236e6f0 123 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 77:b5886236e6f0 124 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 77:b5886236e6f0 125 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 126
mbed_official 77:b5886236e6f0 127 // Enable and set EXTI interrupt to the lowest priority
mbed_official 77:b5886236e6f0 128 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 77:b5886236e6f0 129 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 77:b5886236e6f0 130 NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
mbed_official 77:b5886236e6f0 131 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 77:b5886236e6f0 132 NVIC_Init(&NVIC_InitStructure);
mbed_official 77:b5886236e6f0 133
mbed_official 77:b5886236e6f0 134 NVIC_SetVector(irq_n, vector);
mbed_official 77:b5886236e6f0 135 NVIC_EnableIRQ(irq_n);
mbed_official 77:b5886236e6f0 136
mbed_official 77:b5886236e6f0 137 // Save informations for future use
mbed_official 77:b5886236e6f0 138 obj->irq_n = irq_n;
mbed_official 77:b5886236e6f0 139 obj->irq_index = irq_index;
mbed_official 77:b5886236e6f0 140 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 141 channel_ids[irq_index] = id;
mbed_official 77:b5886236e6f0 142 channel_gpio[irq_index] = gpio_add;
mbed_official 77:b5886236e6f0 143 channel_pin[irq_index] = pin_index;
mbed_official 77:b5886236e6f0 144
mbed_official 77:b5886236e6f0 145 irq_handler = handler;
mbed_official 77:b5886236e6f0 146
mbed_official 77:b5886236e6f0 147 return 0;
mbed_official 77:b5886236e6f0 148 }
mbed_official 77:b5886236e6f0 149
mbed_official 77:b5886236e6f0 150 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 151 channel_ids[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 152 channel_gpio[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 153 channel_pin[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 154 // Disable EXTI line
mbed_official 77:b5886236e6f0 155 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 156 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 157 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 158 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 159 }
mbed_official 77:b5886236e6f0 160
mbed_official 77:b5886236e6f0 161 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 77:b5886236e6f0 162 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 163
mbed_official 77:b5886236e6f0 164 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 77:b5886236e6f0 165
mbed_official 77:b5886236e6f0 166 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 77:b5886236e6f0 167 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 77:b5886236e6f0 168
mbed_official 77:b5886236e6f0 169 if (event == IRQ_RISE) {
mbed_official 77:b5886236e6f0 170 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 77:b5886236e6f0 171 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 77:b5886236e6f0 172 obj->event = EDGE_BOTH;
mbed_official 77:b5886236e6f0 173 }
mbed_official 77:b5886236e6f0 174 else { // NONE or RISE
mbed_official 77:b5886236e6f0 175 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 77:b5886236e6f0 176 obj->event = EDGE_RISE;
mbed_official 77:b5886236e6f0 177 }
mbed_official 77:b5886236e6f0 178 }
mbed_official 77:b5886236e6f0 179
mbed_official 77:b5886236e6f0 180 if (event == IRQ_FALL) {
mbed_official 77:b5886236e6f0 181 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 77:b5886236e6f0 182 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 77:b5886236e6f0 183 obj->event = EDGE_BOTH;
mbed_official 77:b5886236e6f0 184 }
mbed_official 77:b5886236e6f0 185 else { // NONE or FALL
mbed_official 77:b5886236e6f0 186 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 77:b5886236e6f0 187 obj->event = EDGE_FALL;
mbed_official 77:b5886236e6f0 188 }
mbed_official 77:b5886236e6f0 189 }
mbed_official 77:b5886236e6f0 190
mbed_official 77:b5886236e6f0 191 if (enable) {
mbed_official 77:b5886236e6f0 192 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 77:b5886236e6f0 193 }
mbed_official 77:b5886236e6f0 194 else {
mbed_official 77:b5886236e6f0 195 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 77:b5886236e6f0 196 }
mbed_official 77:b5886236e6f0 197
mbed_official 77:b5886236e6f0 198 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 199 }
mbed_official 77:b5886236e6f0 200
mbed_official 77:b5886236e6f0 201 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 202 NVIC_EnableIRQ(obj->irq_n);
mbed_official 77:b5886236e6f0 203 }
mbed_official 77:b5886236e6f0 204
mbed_official 77:b5886236e6f0 205 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 206 NVIC_DisableIRQ(obj->irq_n);
mbed_official 77:b5886236e6f0 207 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 208 }