Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3XX/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:
158:3121b9889f7b
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 155:8435094ec241 1 /* mbed Microcontroller Library
mbed_official 155:8435094ec241 2 *******************************************************************************
mbed_official 155:8435094ec241 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 155:8435094ec241 4 * All rights reserved.
mbed_official 155:8435094ec241 5 *
mbed_official 155:8435094ec241 6 * Redistribution and use in source and binary forms, with or without
mbed_official 155:8435094ec241 7 * modification, are permitted provided that the following conditions are met:
mbed_official 155:8435094ec241 8 *
mbed_official 155:8435094ec241 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 155:8435094ec241 10 * this list of conditions and the following disclaimer.
mbed_official 155:8435094ec241 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 155:8435094ec241 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 155:8435094ec241 13 * and/or other materials provided with the distribution.
mbed_official 155:8435094ec241 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 155:8435094ec241 15 * may be used to endorse or promote products derived from this software
mbed_official 155:8435094ec241 16 * without specific prior written permission.
mbed_official 155:8435094ec241 17 *
mbed_official 155:8435094ec241 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 155:8435094ec241 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 155:8435094ec241 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 155:8435094ec241 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 155:8435094ec241 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 155:8435094ec241 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 155:8435094ec241 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 155:8435094ec241 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 155:8435094ec241 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 155:8435094ec241 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 155:8435094ec241 28 *******************************************************************************
mbed_official 155:8435094ec241 29 */
mbed_official 155:8435094ec241 30 #include <stddef.h>
mbed_official 155:8435094ec241 31 #include "cmsis.h"
mbed_official 155:8435094ec241 32
mbed_official 155:8435094ec241 33 #include "gpio_irq_api.h"
mbed_official 155:8435094ec241 34 #include "pinmap.h"
mbed_official 250:a49055e7a707 35 #include "mbed_error.h"
mbed_official 155:8435094ec241 36
mbed_official 155:8435094ec241 37 #define EDGE_NONE (0)
mbed_official 155:8435094ec241 38 #define EDGE_RISE (1)
mbed_official 155:8435094ec241 39 #define EDGE_FALL (2)
mbed_official 155:8435094ec241 40 #define EDGE_BOTH (3)
mbed_official 155:8435094ec241 41
mbed_official 155:8435094ec241 42 #define CHANNEL_NUM (7)
mbed_official 155:8435094ec241 43
mbed_official 155:8435094ec241 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 155:8435094ec241 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 155:8435094ec241 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 155:8435094ec241 47
mbed_official 155:8435094ec241 48 static gpio_irq_handler irq_handler;
mbed_official 155:8435094ec241 49
mbed_official 155:8435094ec241 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 155:8435094ec241 51 // Retrieve the gpio and pin that generate the irq
mbed_official 155:8435094ec241 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 155:8435094ec241 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 155:8435094ec241 54
mbed_official 155:8435094ec241 55 // Clear interrupt flag
mbed_official 155:8435094ec241 56 if (EXTI_GetITStatus(channel_pin[irq_index]) != RESET) {
mbed_official 155:8435094ec241 57 EXTI_ClearITPendingBit(channel_pin[irq_index]);
mbed_official 155:8435094ec241 58 }
mbed_official 155:8435094ec241 59
mbed_official 155:8435094ec241 60 if (channel_ids[irq_index] == 0) return;
mbed_official 155:8435094ec241 61
mbed_official 155:8435094ec241 62 // Check which edge has generated the irq
mbed_official 155:8435094ec241 63 if ((gpio->IDR & pin) == 0) {
mbed_official 155:8435094ec241 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 155:8435094ec241 65 } else {
mbed_official 155:8435094ec241 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 155:8435094ec241 67 }
mbed_official 155:8435094ec241 68 }
mbed_official 155:8435094ec241 69
mbed_official 155:8435094ec241 70 static void gpio_irq0(void) {
mbed_official 155:8435094ec241 71 handle_interrupt_in(0); // EXTI line 0
mbed_official 155:8435094ec241 72 }
mbed_official 155:8435094ec241 73
mbed_official 155:8435094ec241 74 static void gpio_irq1(void) {
mbed_official 155:8435094ec241 75 handle_interrupt_in(1); // EXTI line 1
mbed_official 155:8435094ec241 76 }
mbed_official 155:8435094ec241 77
mbed_official 155:8435094ec241 78 static void gpio_irq2(void) {
mbed_official 155:8435094ec241 79 handle_interrupt_in(2); // EXTI line 2
mbed_official 155:8435094ec241 80 }
mbed_official 155:8435094ec241 81
mbed_official 155:8435094ec241 82 static void gpio_irq3(void) {
mbed_official 155:8435094ec241 83 handle_interrupt_in(3); // EXTI line 3
mbed_official 155:8435094ec241 84 }
mbed_official 155:8435094ec241 85
mbed_official 155:8435094ec241 86 static void gpio_irq4(void) {
mbed_official 155:8435094ec241 87 handle_interrupt_in(4); // EXTI line 4
mbed_official 155:8435094ec241 88 }
mbed_official 155:8435094ec241 89
mbed_official 155:8435094ec241 90 static void gpio_irq5(void) {
mbed_official 155:8435094ec241 91 handle_interrupt_in(5); // EXTI lines 5 to 9
mbed_official 155:8435094ec241 92 }
mbed_official 155:8435094ec241 93
mbed_official 155:8435094ec241 94 static void gpio_irq6(void) {
mbed_official 155:8435094ec241 95 handle_interrupt_in(6); // EXTI lines 10 to 15
mbed_official 155:8435094ec241 96 }
mbed_official 155:8435094ec241 97
mbed_official 155:8435094ec241 98 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 155:8435094ec241 99
mbed_official 155:8435094ec241 100 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 155:8435094ec241 101 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 155:8435094ec241 102 uint32_t vector = 0;
mbed_official 155:8435094ec241 103 uint32_t irq_index;
mbed_official 155:8435094ec241 104
mbed_official 155:8435094ec241 105 if (pin == NC) return -1;
mbed_official 155:8435094ec241 106
mbed_official 155:8435094ec241 107 uint32_t port_index = STM_PORT(pin);
mbed_official 155:8435094ec241 108 uint32_t pin_index = STM_PIN(pin);
mbed_official 155:8435094ec241 109
mbed_official 155:8435094ec241 110 // Select irq number and interrupt routine
mbed_official 155:8435094ec241 111 switch (pin_index) {
mbed_official 155:8435094ec241 112 case 0:
mbed_official 155:8435094ec241 113 irq_n = EXTI0_IRQn;
mbed_official 155:8435094ec241 114 vector = (uint32_t)&gpio_irq0;
mbed_official 155:8435094ec241 115 irq_index = 0;
mbed_official 155:8435094ec241 116 break;
mbed_official 155:8435094ec241 117 case 1:
mbed_official 155:8435094ec241 118 irq_n = EXTI1_IRQn;
mbed_official 155:8435094ec241 119 vector = (uint32_t)&gpio_irq1;
mbed_official 155:8435094ec241 120 irq_index = 1;
mbed_official 155:8435094ec241 121 break;
mbed_official 155:8435094ec241 122 case 2:
mbed_official 155:8435094ec241 123 irq_n = EXTI2_TS_IRQn;
mbed_official 155:8435094ec241 124 vector = (uint32_t)&gpio_irq2;
mbed_official 155:8435094ec241 125 irq_index = 2;
mbed_official 155:8435094ec241 126 break;
mbed_official 155:8435094ec241 127 case 3:
mbed_official 155:8435094ec241 128 irq_n = EXTI3_IRQn;
mbed_official 155:8435094ec241 129 vector = (uint32_t)&gpio_irq3;
mbed_official 155:8435094ec241 130 irq_index = 3;
mbed_official 155:8435094ec241 131 break;
mbed_official 155:8435094ec241 132 case 4:
mbed_official 155:8435094ec241 133 irq_n = EXTI4_IRQn;
mbed_official 155:8435094ec241 134 vector = (uint32_t)&gpio_irq4;
mbed_official 155:8435094ec241 135 irq_index = 4;
mbed_official 155:8435094ec241 136 break;
mbed_official 155:8435094ec241 137 case 5:
mbed_official 155:8435094ec241 138 case 6:
mbed_official 155:8435094ec241 139 case 7:
mbed_official 155:8435094ec241 140 case 8:
mbed_official 155:8435094ec241 141 case 9:
mbed_official 155:8435094ec241 142 irq_n = EXTI9_5_IRQn;
mbed_official 155:8435094ec241 143 vector = (uint32_t)&gpio_irq5;
mbed_official 155:8435094ec241 144 irq_index = 5;
mbed_official 155:8435094ec241 145 break;
mbed_official 155:8435094ec241 146 case 10:
mbed_official 155:8435094ec241 147 case 11:
mbed_official 155:8435094ec241 148 case 12:
mbed_official 155:8435094ec241 149 case 13:
mbed_official 155:8435094ec241 150 case 14:
mbed_official 155:8435094ec241 151 case 15:
mbed_official 155:8435094ec241 152 irq_n = EXTI15_10_IRQn;
mbed_official 155:8435094ec241 153 vector = (uint32_t)&gpio_irq6;
mbed_official 155:8435094ec241 154 irq_index = 6;
mbed_official 155:8435094ec241 155 break;
mbed_official 155:8435094ec241 156 default:
mbed_official 158:3121b9889f7b 157 error("This pin is not supported with InterruptIn.");
mbed_official 155:8435094ec241 158 return -1;
mbed_official 155:8435094ec241 159 }
mbed_official 155:8435094ec241 160
mbed_official 155:8435094ec241 161 // Enable GPIO clock
mbed_official 155:8435094ec241 162 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 155:8435094ec241 163
mbed_official 155:8435094ec241 164 // Enable SYSCFG clock
mbed_official 155:8435094ec241 165 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 155:8435094ec241 166
mbed_official 155:8435094ec241 167 // Connect EXTI line to pin
mbed_official 155:8435094ec241 168 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 155:8435094ec241 169
mbed_official 155:8435094ec241 170 // Configure EXTI line
mbed_official 155:8435094ec241 171 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 155:8435094ec241 172 EXTI_InitStructure.EXTI_Line = pin_index;
mbed_official 155:8435094ec241 173 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 155:8435094ec241 174 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 155:8435094ec241 175 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 155:8435094ec241 176 EXTI_Init(&EXTI_InitStructure);
mbed_official 155:8435094ec241 177
mbed_official 155:8435094ec241 178 // Enable and set EXTI interrupt to the lowest priority
mbed_official 155:8435094ec241 179 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 155:8435094ec241 180 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 155:8435094ec241 181 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 155:8435094ec241 182 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 155:8435094ec241 183 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 155:8435094ec241 184 NVIC_Init(&NVIC_InitStructure);
mbed_official 155:8435094ec241 185
mbed_official 155:8435094ec241 186 NVIC_SetVector(irq_n, vector);
mbed_official 155:8435094ec241 187 NVIC_EnableIRQ(irq_n);
mbed_official 155:8435094ec241 188
mbed_official 155:8435094ec241 189 // Save informations for future use
mbed_official 155:8435094ec241 190 obj->irq_n = irq_n;
mbed_official 155:8435094ec241 191 obj->irq_index = irq_index;
mbed_official 155:8435094ec241 192 obj->event = EDGE_NONE;
mbed_official 155:8435094ec241 193 channel_ids[irq_index] = id;
mbed_official 155:8435094ec241 194 channel_gpio[irq_index] = gpio_add;
mbed_official 155:8435094ec241 195 channel_pin[irq_index] = pin_index;
mbed_official 155:8435094ec241 196
mbed_official 155:8435094ec241 197 irq_handler = handler;
mbed_official 155:8435094ec241 198
mbed_official 155:8435094ec241 199 return 0;
mbed_official 155:8435094ec241 200 }
mbed_official 155:8435094ec241 201
mbed_official 155:8435094ec241 202 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 155:8435094ec241 203 channel_ids[obj->irq_index] = 0;
mbed_official 155:8435094ec241 204 channel_gpio[obj->irq_index] = 0;
mbed_official 155:8435094ec241 205 channel_pin[obj->irq_index] = 0;
mbed_official 155:8435094ec241 206 // Disable EXTI line
mbed_official 155:8435094ec241 207 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 155:8435094ec241 208 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 155:8435094ec241 209 EXTI_Init(&EXTI_InitStructure);
mbed_official 155:8435094ec241 210 obj->event = EDGE_NONE;
mbed_official 155:8435094ec241 211 }
mbed_official 155:8435094ec241 212
mbed_official 155:8435094ec241 213 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 155:8435094ec241 214 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 155:8435094ec241 215
mbed_official 155:8435094ec241 216 EXTI_InitStructure.EXTI_Line = channel_pin[obj->irq_index];
mbed_official 155:8435094ec241 217 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 155:8435094ec241 218
mbed_official 155:8435094ec241 219 if (event == IRQ_RISE) {
mbed_official 155:8435094ec241 220 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 155:8435094ec241 221 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 155:8435094ec241 222 obj->event = EDGE_BOTH;
mbed_official 155:8435094ec241 223 } else { // NONE or RISE
mbed_official 155:8435094ec241 224 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 155:8435094ec241 225 obj->event = EDGE_RISE;
mbed_official 155:8435094ec241 226 }
mbed_official 155:8435094ec241 227 }
mbed_official 155:8435094ec241 228
mbed_official 155:8435094ec241 229 if (event == IRQ_FALL) {
mbed_official 155:8435094ec241 230 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 155:8435094ec241 231 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 155:8435094ec241 232 obj->event = EDGE_BOTH;
mbed_official 155:8435094ec241 233 } else { // NONE or FALL
mbed_official 155:8435094ec241 234 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 155:8435094ec241 235 obj->event = EDGE_FALL;
mbed_official 155:8435094ec241 236 }
mbed_official 155:8435094ec241 237 }
mbed_official 155:8435094ec241 238
mbed_official 155:8435094ec241 239 if (enable) {
mbed_official 155:8435094ec241 240 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 155:8435094ec241 241 } else {
mbed_official 155:8435094ec241 242 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 155:8435094ec241 243 }
mbed_official 155:8435094ec241 244
mbed_official 155:8435094ec241 245 EXTI_Init(&EXTI_InitStructure);
mbed_official 155:8435094ec241 246 }
mbed_official 155:8435094ec241 247
mbed_official 155:8435094ec241 248 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 155:8435094ec241 249 NVIC_EnableIRQ(obj->irq_n);
mbed_official 155:8435094ec241 250 }
mbed_official 155:8435094ec241 251
mbed_official 155:8435094ec241 252 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 155:8435094ec241 253 NVIC_DisableIRQ(obj->irq_n);
mbed_official 155:8435094ec241 254 obj->event = EDGE_NONE;
mbed_official 155:8435094ec241 255 }