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@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
216:577900467c9e
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

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 250:a49055e7a707 35 #include "mbed_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 216:577900467c9e 56 if (EXTI_GetITStatus(pin) != RESET) {
mbed_official 77:b5886236e6f0 57 EXTI_ClearITPendingBit(pin);
mbed_official 77:b5886236e6f0 58 }
mbed_official 216:577900467c9e 59
mbed_official 77:b5886236e6f0 60 if (channel_ids[irq_index] == 0) return;
mbed_official 216:577900467c9e 61
mbed_official 77:b5886236e6f0 62 // Check which edge has generated the irq
mbed_official 77:b5886236e6f0 63 if ((gpio->IDR & pin) == 0) {
mbed_official 77:b5886236e6f0 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 216:577900467c9e 65 } else {
mbed_official 77:b5886236e6f0 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 77:b5886236e6f0 67 }
mbed_official 77:b5886236e6f0 68 }
mbed_official 77:b5886236e6f0 69
mbed_official 77:b5886236e6f0 70 // The irq_index is passed to the function
mbed_official 216:577900467c9e 71 static void gpio_irq0(void) {
mbed_official 216:577900467c9e 72 handle_interrupt_in(0);
mbed_official 216:577900467c9e 73 }
mbed_official 216:577900467c9e 74 static void gpio_irq1(void) {
mbed_official 216:577900467c9e 75 handle_interrupt_in(1);
mbed_official 216:577900467c9e 76 }
mbed_official 216:577900467c9e 77 static void gpio_irq2(void) {
mbed_official 216:577900467c9e 78 handle_interrupt_in(2);
mbed_official 216:577900467c9e 79 }
mbed_official 77:b5886236e6f0 80
mbed_official 77:b5886236e6f0 81 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 77:b5886236e6f0 82
mbed_official 77:b5886236e6f0 83 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 77:b5886236e6f0 84 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 77:b5886236e6f0 85 uint32_t vector = 0;
mbed_official 77:b5886236e6f0 86 uint32_t irq_index;
mbed_official 77:b5886236e6f0 87
mbed_official 77:b5886236e6f0 88 if (pin == NC) return -1;
mbed_official 77:b5886236e6f0 89
mbed_official 77:b5886236e6f0 90 uint32_t port_index = STM_PORT(pin);
mbed_official 77:b5886236e6f0 91 uint32_t pin_index = STM_PIN(pin);
mbed_official 77:b5886236e6f0 92
mbed_official 77:b5886236e6f0 93 // Select irq number and interrupt routine
mbed_official 156:38b9eb24e1d1 94 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 156:38b9eb24e1d1 95 irq_n = EXTI0_1_IRQn;
mbed_official 156:38b9eb24e1d1 96 vector = (uint32_t)&gpio_irq0;
mbed_official 156:38b9eb24e1d1 97 irq_index = 0;
mbed_official 216:577900467c9e 98 } else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 156:38b9eb24e1d1 99 irq_n = EXTI2_3_IRQn;
mbed_official 156:38b9eb24e1d1 100 vector = (uint32_t)&gpio_irq1;
mbed_official 156:38b9eb24e1d1 101 irq_index = 1;
mbed_official 216:577900467c9e 102 } else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 156:38b9eb24e1d1 103 irq_n = EXTI4_15_IRQn;
mbed_official 156:38b9eb24e1d1 104 vector = (uint32_t)&gpio_irq2;
mbed_official 156:38b9eb24e1d1 105 irq_index = 2;
mbed_official 216:577900467c9e 106 } else {
mbed_official 156:38b9eb24e1d1 107 error("InterruptIn error: pin not supported.\n");
mbed_official 156:38b9eb24e1d1 108 return -1;
mbed_official 77:b5886236e6f0 109 }
mbed_official 77:b5886236e6f0 110
mbed_official 77:b5886236e6f0 111 // Enable GPIO clock
mbed_official 77:b5886236e6f0 112 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 77:b5886236e6f0 113
mbed_official 77:b5886236e6f0 114 // Enable SYSCFG clock
mbed_official 77:b5886236e6f0 115 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 216:577900467c9e 116
mbed_official 77:b5886236e6f0 117 // Connect EXTI line to pin
mbed_official 77:b5886236e6f0 118 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 77:b5886236e6f0 119
mbed_official 77:b5886236e6f0 120 // Configure EXTI line
mbed_official 216:577900467c9e 121 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 122 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 77:b5886236e6f0 123 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 77:b5886236e6f0 124 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 77:b5886236e6f0 125 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 77:b5886236e6f0 126 EXTI_Init(&EXTI_InitStructure);
mbed_official 216:577900467c9e 127
mbed_official 77:b5886236e6f0 128 // Enable and set EXTI interrupt to the lowest priority
mbed_official 77:b5886236e6f0 129 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 77:b5886236e6f0 130 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 77:b5886236e6f0 131 NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
mbed_official 77:b5886236e6f0 132 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 77:b5886236e6f0 133 NVIC_Init(&NVIC_InitStructure);
mbed_official 216:577900467c9e 134
mbed_official 77:b5886236e6f0 135 NVIC_SetVector(irq_n, vector);
mbed_official 77:b5886236e6f0 136 NVIC_EnableIRQ(irq_n);
mbed_official 77:b5886236e6f0 137
mbed_official 77:b5886236e6f0 138 // Save informations for future use
mbed_official 77:b5886236e6f0 139 obj->irq_n = irq_n;
mbed_official 77:b5886236e6f0 140 obj->irq_index = irq_index;
mbed_official 77:b5886236e6f0 141 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 142 channel_ids[irq_index] = id;
mbed_official 77:b5886236e6f0 143 channel_gpio[irq_index] = gpio_add;
mbed_official 77:b5886236e6f0 144 channel_pin[irq_index] = pin_index;
mbed_official 216:577900467c9e 145
mbed_official 216:577900467c9e 146 irq_handler = handler;
mbed_official 216:577900467c9e 147
mbed_official 77:b5886236e6f0 148 return 0;
mbed_official 77:b5886236e6f0 149 }
mbed_official 77:b5886236e6f0 150
mbed_official 77:b5886236e6f0 151 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 152 channel_ids[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 153 channel_gpio[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 154 channel_pin[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 155 // Disable EXTI line
mbed_official 77:b5886236e6f0 156 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 157 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 216:577900467c9e 158 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 159 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 160 }
mbed_official 77:b5886236e6f0 161
mbed_official 77:b5886236e6f0 162 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 77:b5886236e6f0 163 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 216:577900467c9e 164
mbed_official 77:b5886236e6f0 165 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 77:b5886236e6f0 166
mbed_official 77:b5886236e6f0 167 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 77:b5886236e6f0 168 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 216:577900467c9e 169
mbed_official 77:b5886236e6f0 170 if (event == IRQ_RISE) {
mbed_official 77:b5886236e6f0 171 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 77:b5886236e6f0 172 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 77:b5886236e6f0 173 obj->event = EDGE_BOTH;
mbed_official 216:577900467c9e 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 216:577900467c9e 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 216:577900467c9e 184 } else { // NONE or FALL
mbed_official 77:b5886236e6f0 185 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 77:b5886236e6f0 186 obj->event = EDGE_FALL;
mbed_official 77:b5886236e6f0 187 }
mbed_official 77:b5886236e6f0 188 }
mbed_official 216:577900467c9e 189
mbed_official 77:b5886236e6f0 190 if (enable) {
mbed_official 77:b5886236e6f0 191 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 216:577900467c9e 192 } else {
mbed_official 77:b5886236e6f0 193 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 77:b5886236e6f0 194 }
mbed_official 216:577900467c9e 195
mbed_official 77:b5886236e6f0 196 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 197 }
mbed_official 77:b5886236e6f0 198
mbed_official 77:b5886236e6f0 199 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 200 NVIC_EnableIRQ(obj->irq_n);
mbed_official 77:b5886236e6f0 201 }
mbed_official 77:b5886236e6f0 202
mbed_official 77:b5886236e6f0 203 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 204 NVIC_DisableIRQ(obj->irq_n);
mbed_official 77:b5886236e6f0 205 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 206 }