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_F302R8/gpio_irq_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
285:31249416b6f9 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 125:23cc3068a9e4 1 /* mbed Microcontroller Library
mbed_official 125:23cc3068a9e4 2 *******************************************************************************
mbed_official 125:23cc3068a9e4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 125:23cc3068a9e4 4 * All rights reserved.
mbed_official 125:23cc3068a9e4 5 *
mbed_official 125:23cc3068a9e4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 125:23cc3068a9e4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 125:23cc3068a9e4 8 *
mbed_official 125:23cc3068a9e4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 125:23cc3068a9e4 10 * this list of conditions and the following disclaimer.
mbed_official 125:23cc3068a9e4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 125:23cc3068a9e4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 125:23cc3068a9e4 13 * and/or other materials provided with the distribution.
mbed_official 125:23cc3068a9e4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 125:23cc3068a9e4 15 * may be used to endorse or promote products derived from this software
mbed_official 125:23cc3068a9e4 16 * without specific prior written permission.
mbed_official 125:23cc3068a9e4 17 *
mbed_official 125:23cc3068a9e4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 125:23cc3068a9e4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 125:23cc3068a9e4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 125:23cc3068a9e4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 125:23cc3068a9e4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 125:23cc3068a9e4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 125:23cc3068a9e4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 125:23cc3068a9e4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 125:23cc3068a9e4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 125:23cc3068a9e4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 125:23cc3068a9e4 28 *******************************************************************************
mbed_official 125:23cc3068a9e4 29 */
mbed_official 125:23cc3068a9e4 30 #include <stddef.h>
mbed_official 125:23cc3068a9e4 31 #include "cmsis.h"
mbed_official 125:23cc3068a9e4 32 #include "gpio_irq_api.h"
mbed_official 125:23cc3068a9e4 33 #include "pinmap.h"
mbed_official 285:31249416b6f9 34 #include "mbed_error.h"
mbed_official 125:23cc3068a9e4 35
mbed_official 125:23cc3068a9e4 36 #define EDGE_NONE (0)
mbed_official 125:23cc3068a9e4 37 #define EDGE_RISE (1)
mbed_official 125:23cc3068a9e4 38 #define EDGE_FALL (2)
mbed_official 125:23cc3068a9e4 39 #define EDGE_BOTH (3)
mbed_official 125:23cc3068a9e4 40
mbed_official 125:23cc3068a9e4 41 #define CHANNEL_NUM (7)
mbed_official 125:23cc3068a9e4 42
mbed_official 125:23cc3068a9e4 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 46
mbed_official 125:23cc3068a9e4 47 static gpio_irq_handler irq_handler;
mbed_official 125:23cc3068a9e4 48
mbed_official 125:23cc3068a9e4 49 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 125:23cc3068a9e4 50 // Retrieve the gpio and pin that generate the irq
mbed_official 125:23cc3068a9e4 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 125:23cc3068a9e4 52 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 125:23cc3068a9e4 53
mbed_official 125:23cc3068a9e4 54 // Clear interrupt flag
mbed_official 135:067cc8ba23da 55 if (EXTI_GetITStatus(channel_pin[irq_index]) != RESET) {
mbed_official 125:23cc3068a9e4 56 EXTI_ClearITPendingBit(channel_pin[irq_index]);
mbed_official 125:23cc3068a9e4 57 }
mbed_official 135:067cc8ba23da 58
mbed_official 125:23cc3068a9e4 59 if (channel_ids[irq_index] == 0) return;
mbed_official 135:067cc8ba23da 60
mbed_official 125:23cc3068a9e4 61 // Check which edge has generated the irq
mbed_official 125:23cc3068a9e4 62 if ((gpio->IDR & pin) == 0) {
mbed_official 125:23cc3068a9e4 63 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 135:067cc8ba23da 64 } else {
mbed_official 125:23cc3068a9e4 65 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 125:23cc3068a9e4 66 }
mbed_official 125:23cc3068a9e4 67 }
mbed_official 125:23cc3068a9e4 68
mbed_official 135:067cc8ba23da 69 static void gpio_irq0(void) {
mbed_official 135:067cc8ba23da 70 handle_interrupt_in(0); // EXTI line 0
mbed_official 135:067cc8ba23da 71 }
mbed_official 135:067cc8ba23da 72
mbed_official 135:067cc8ba23da 73 static void gpio_irq1(void) {
mbed_official 135:067cc8ba23da 74 handle_interrupt_in(1); // EXTI line 1
mbed_official 135:067cc8ba23da 75 }
mbed_official 135:067cc8ba23da 76
mbed_official 135:067cc8ba23da 77 static void gpio_irq2(void) {
mbed_official 135:067cc8ba23da 78 handle_interrupt_in(2); // EXTI line 2
mbed_official 135:067cc8ba23da 79 }
mbed_official 135:067cc8ba23da 80
mbed_official 135:067cc8ba23da 81 static void gpio_irq3(void) {
mbed_official 135:067cc8ba23da 82 handle_interrupt_in(3); // EXTI line 3
mbed_official 135:067cc8ba23da 83 }
mbed_official 135:067cc8ba23da 84
mbed_official 135:067cc8ba23da 85 static void gpio_irq4(void) {
mbed_official 135:067cc8ba23da 86 handle_interrupt_in(4); // EXTI line 4
mbed_official 135:067cc8ba23da 87 }
mbed_official 135:067cc8ba23da 88
mbed_official 135:067cc8ba23da 89 static void gpio_irq5(void) {
mbed_official 135:067cc8ba23da 90 handle_interrupt_in(5); // EXTI lines 5 to 9
mbed_official 135:067cc8ba23da 91 }
mbed_official 135:067cc8ba23da 92
mbed_official 135:067cc8ba23da 93 static void gpio_irq6(void) {
mbed_official 135:067cc8ba23da 94 handle_interrupt_in(6); // EXTI lines 10 to 15
mbed_official 135:067cc8ba23da 95 }
mbed_official 125:23cc3068a9e4 96
mbed_official 125:23cc3068a9e4 97 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 125:23cc3068a9e4 98
mbed_official 125:23cc3068a9e4 99 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 125:23cc3068a9e4 100 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 125:23cc3068a9e4 101 uint32_t vector = 0;
mbed_official 125:23cc3068a9e4 102 uint32_t irq_index;
mbed_official 125:23cc3068a9e4 103
mbed_official 125:23cc3068a9e4 104 if (pin == NC) return -1;
mbed_official 125:23cc3068a9e4 105
mbed_official 125:23cc3068a9e4 106 uint32_t port_index = STM_PORT(pin);
mbed_official 125:23cc3068a9e4 107 uint32_t pin_index = STM_PIN(pin);
mbed_official 125:23cc3068a9e4 108
mbed_official 125:23cc3068a9e4 109 // Select irq number and interrupt routine
mbed_official 125:23cc3068a9e4 110 switch (pin_index) {
mbed_official 125:23cc3068a9e4 111 case 0:
mbed_official 125:23cc3068a9e4 112 irq_n = EXTI0_IRQn;
mbed_official 125:23cc3068a9e4 113 vector = (uint32_t)&gpio_irq0;
mbed_official 125:23cc3068a9e4 114 irq_index = 0;
mbed_official 125:23cc3068a9e4 115 break;
mbed_official 125:23cc3068a9e4 116 case 1:
mbed_official 125:23cc3068a9e4 117 irq_n = EXTI1_IRQn;
mbed_official 125:23cc3068a9e4 118 vector = (uint32_t)&gpio_irq1;
mbed_official 125:23cc3068a9e4 119 irq_index = 1;
mbed_official 125:23cc3068a9e4 120 break;
mbed_official 125:23cc3068a9e4 121 case 2:
mbed_official 125:23cc3068a9e4 122 irq_n = EXTI2_TS_IRQn;
mbed_official 125:23cc3068a9e4 123 vector = (uint32_t)&gpio_irq2;
mbed_official 125:23cc3068a9e4 124 irq_index = 2;
mbed_official 125:23cc3068a9e4 125 break;
mbed_official 125:23cc3068a9e4 126 case 3:
mbed_official 125:23cc3068a9e4 127 irq_n = EXTI3_IRQn;
mbed_official 125:23cc3068a9e4 128 vector = (uint32_t)&gpio_irq3;
mbed_official 125:23cc3068a9e4 129 irq_index = 3;
mbed_official 125:23cc3068a9e4 130 break;
mbed_official 125:23cc3068a9e4 131 case 4:
mbed_official 125:23cc3068a9e4 132 irq_n = EXTI4_IRQn;
mbed_official 125:23cc3068a9e4 133 vector = (uint32_t)&gpio_irq4;
mbed_official 125:23cc3068a9e4 134 irq_index = 4;
mbed_official 125:23cc3068a9e4 135 break;
mbed_official 125:23cc3068a9e4 136 case 5:
mbed_official 125:23cc3068a9e4 137 case 6:
mbed_official 125:23cc3068a9e4 138 case 7:
mbed_official 125:23cc3068a9e4 139 case 8:
mbed_official 125:23cc3068a9e4 140 case 9:
mbed_official 125:23cc3068a9e4 141 irq_n = EXTI9_5_IRQn;
mbed_official 125:23cc3068a9e4 142 vector = (uint32_t)&gpio_irq5;
mbed_official 125:23cc3068a9e4 143 irq_index = 5;
mbed_official 125:23cc3068a9e4 144 break;
mbed_official 125:23cc3068a9e4 145 case 10:
mbed_official 125:23cc3068a9e4 146 case 11:
mbed_official 125:23cc3068a9e4 147 case 12:
mbed_official 125:23cc3068a9e4 148 case 13:
mbed_official 125:23cc3068a9e4 149 case 14:
mbed_official 125:23cc3068a9e4 150 case 15:
mbed_official 125:23cc3068a9e4 151 irq_n = EXTI15_10_IRQn;
mbed_official 125:23cc3068a9e4 152 vector = (uint32_t)&gpio_irq6;
mbed_official 125:23cc3068a9e4 153 irq_index = 6;
mbed_official 125:23cc3068a9e4 154 break;
mbed_official 125:23cc3068a9e4 155 default:
mbed_official 158:3121b9889f7b 156 error("This pin is not supported with InterruptIn.");
mbed_official 125:23cc3068a9e4 157 return -1;
mbed_official 125:23cc3068a9e4 158 }
mbed_official 125:23cc3068a9e4 159
mbed_official 125:23cc3068a9e4 160 // Enable GPIO clock
mbed_official 125:23cc3068a9e4 161 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 125:23cc3068a9e4 162
mbed_official 125:23cc3068a9e4 163 // Enable SYSCFG clock
mbed_official 125:23cc3068a9e4 164 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 135:067cc8ba23da 165
mbed_official 125:23cc3068a9e4 166 // Connect EXTI line to pin
mbed_official 125:23cc3068a9e4 167 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 125:23cc3068a9e4 168
mbed_official 125:23cc3068a9e4 169 // Configure EXTI line
mbed_official 135:067cc8ba23da 170 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 125:23cc3068a9e4 171 EXTI_InitStructure.EXTI_Line = pin_index;
mbed_official 125:23cc3068a9e4 172 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 125:23cc3068a9e4 173 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 125:23cc3068a9e4 174 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 125:23cc3068a9e4 175 EXTI_Init(&EXTI_InitStructure);
mbed_official 135:067cc8ba23da 176
mbed_official 125:23cc3068a9e4 177 // Enable and set EXTI interrupt to the lowest priority
mbed_official 125:23cc3068a9e4 178 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 125:23cc3068a9e4 179 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 125:23cc3068a9e4 180 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 125:23cc3068a9e4 181 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 125:23cc3068a9e4 182 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 125:23cc3068a9e4 183 NVIC_Init(&NVIC_InitStructure);
mbed_official 135:067cc8ba23da 184
mbed_official 125:23cc3068a9e4 185 NVIC_SetVector(irq_n, vector);
mbed_official 125:23cc3068a9e4 186 NVIC_EnableIRQ(irq_n);
mbed_official 125:23cc3068a9e4 187
mbed_official 125:23cc3068a9e4 188 // Save informations for future use
mbed_official 125:23cc3068a9e4 189 obj->irq_n = irq_n;
mbed_official 125:23cc3068a9e4 190 obj->irq_index = irq_index;
mbed_official 125:23cc3068a9e4 191 obj->event = EDGE_NONE;
mbed_official 125:23cc3068a9e4 192 channel_ids[irq_index] = id;
mbed_official 125:23cc3068a9e4 193 channel_gpio[irq_index] = gpio_add;
mbed_official 125:23cc3068a9e4 194 channel_pin[irq_index] = pin_index;
mbed_official 135:067cc8ba23da 195
mbed_official 135:067cc8ba23da 196 irq_handler = handler;
mbed_official 135:067cc8ba23da 197
mbed_official 125:23cc3068a9e4 198 return 0;
mbed_official 125:23cc3068a9e4 199 }
mbed_official 125:23cc3068a9e4 200
mbed_official 125:23cc3068a9e4 201 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 125:23cc3068a9e4 202 channel_ids[obj->irq_index] = 0;
mbed_official 125:23cc3068a9e4 203 channel_gpio[obj->irq_index] = 0;
mbed_official 125:23cc3068a9e4 204 channel_pin[obj->irq_index] = 0;
mbed_official 125:23cc3068a9e4 205 // Disable EXTI line
mbed_official 125:23cc3068a9e4 206 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 125:23cc3068a9e4 207 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 135:067cc8ba23da 208 EXTI_Init(&EXTI_InitStructure);
mbed_official 125:23cc3068a9e4 209 obj->event = EDGE_NONE;
mbed_official 125:23cc3068a9e4 210 }
mbed_official 125:23cc3068a9e4 211
mbed_official 125:23cc3068a9e4 212 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 125:23cc3068a9e4 213 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 125:23cc3068a9e4 214
mbed_official 125:23cc3068a9e4 215 EXTI_InitStructure.EXTI_Line = channel_pin[obj->irq_index];
mbed_official 125:23cc3068a9e4 216 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 135:067cc8ba23da 217
mbed_official 125:23cc3068a9e4 218 if (event == IRQ_RISE) {
mbed_official 125:23cc3068a9e4 219 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 125:23cc3068a9e4 220 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 125:23cc3068a9e4 221 obj->event = EDGE_BOTH;
mbed_official 135:067cc8ba23da 222 } else { // NONE or RISE
mbed_official 125:23cc3068a9e4 223 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 125:23cc3068a9e4 224 obj->event = EDGE_RISE;
mbed_official 125:23cc3068a9e4 225 }
mbed_official 125:23cc3068a9e4 226 }
mbed_official 135:067cc8ba23da 227
mbed_official 125:23cc3068a9e4 228 if (event == IRQ_FALL) {
mbed_official 125:23cc3068a9e4 229 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 125:23cc3068a9e4 230 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 125:23cc3068a9e4 231 obj->event = EDGE_BOTH;
mbed_official 135:067cc8ba23da 232 } else { // NONE or FALL
mbed_official 125:23cc3068a9e4 233 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 125:23cc3068a9e4 234 obj->event = EDGE_FALL;
mbed_official 125:23cc3068a9e4 235 }
mbed_official 125:23cc3068a9e4 236 }
mbed_official 135:067cc8ba23da 237
mbed_official 125:23cc3068a9e4 238 if (enable) {
mbed_official 125:23cc3068a9e4 239 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 135:067cc8ba23da 240 } else {
mbed_official 125:23cc3068a9e4 241 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 125:23cc3068a9e4 242 }
mbed_official 135:067cc8ba23da 243
mbed_official 125:23cc3068a9e4 244 EXTI_Init(&EXTI_InitStructure);
mbed_official 125:23cc3068a9e4 245 }
mbed_official 125:23cc3068a9e4 246
mbed_official 125:23cc3068a9e4 247 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 125:23cc3068a9e4 248 NVIC_EnableIRQ(obj->irq_n);
mbed_official 125:23cc3068a9e4 249 }
mbed_official 125:23cc3068a9e4 250
mbed_official 125:23cc3068a9e4 251 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 125:23cc3068a9e4 252 NVIC_DisableIRQ(obj->irq_n);
mbed_official 125:23cc3068a9e4 253 obj->event = EDGE_NONE;
mbed_official 125:23cc3068a9e4 254 }