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_DISCO_F303VC/gpio_irq_api.c@157:90e3acc479a2, 2014-04-11 (annotated)

Committer:
mbed_official
Date:
Fri Apr 11 17:15:06 2014 +0100
Revision:
157:90e3acc479a2
Child:
241:ffe41b0c8126
Synchronized with git revision 6e20ca17847dceb62132bf3d8519876411e175bf



Full URL: https://github.com/mbedmicro/mbed/commit/6e20ca17847dceb62132bf3d8519876411e175bf/



[STM32F3-Discovery][DISCO_F303VC] initial port.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 *******************************************************************************
mbed_official 157:90e3acc479a2 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 4 * All rights reserved.
mbed_official 157:90e3acc479a2 5 *
mbed_official 157:90e3acc479a2 6 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 7 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 8 *
mbed_official 157:90e3acc479a2 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 10 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 13 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 15 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 16 * without specific prior written permission.
mbed_official 157:90e3acc479a2 17 *
mbed_official 157:90e3acc479a2 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 28 *******************************************************************************
mbed_official 157:90e3acc479a2 29 */
mbed_official 157:90e3acc479a2 30 #include <stddef.h>
mbed_official 157:90e3acc479a2 31 #include "cmsis.h"
mbed_official 157:90e3acc479a2 32
mbed_official 157:90e3acc479a2 33 #include "gpio_irq_api.h"
mbed_official 157:90e3acc479a2 34 #include "pinmap.h"
mbed_official 157:90e3acc479a2 35 #include "error.h"
mbed_official 157:90e3acc479a2 36
mbed_official 157:90e3acc479a2 37 #define EDGE_NONE (0)
mbed_official 157:90e3acc479a2 38 #define EDGE_RISE (1)
mbed_official 157:90e3acc479a2 39 #define EDGE_FALL (2)
mbed_official 157:90e3acc479a2 40 #define EDGE_BOTH (3)
mbed_official 157:90e3acc479a2 41
mbed_official 157:90e3acc479a2 42 #define CHANNEL_NUM (7)
mbed_official 157:90e3acc479a2 43
mbed_official 157:90e3acc479a2 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 157:90e3acc479a2 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 157:90e3acc479a2 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 157:90e3acc479a2 47
mbed_official 157:90e3acc479a2 48 static gpio_irq_handler irq_handler;
mbed_official 157:90e3acc479a2 49
mbed_official 157:90e3acc479a2 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 157:90e3acc479a2 51 // Retrieve the gpio and pin that generate the irq
mbed_official 157:90e3acc479a2 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 157:90e3acc479a2 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 157:90e3acc479a2 54
mbed_official 157:90e3acc479a2 55 // Clear interrupt flag
mbed_official 157:90e3acc479a2 56 if (EXTI_GetITStatus(channel_pin[irq_index]) != RESET) {
mbed_official 157:90e3acc479a2 57 EXTI_ClearITPendingBit(channel_pin[irq_index]);
mbed_official 157:90e3acc479a2 58 }
mbed_official 157:90e3acc479a2 59
mbed_official 157:90e3acc479a2 60 if (channel_ids[irq_index] == 0) return;
mbed_official 157:90e3acc479a2 61
mbed_official 157:90e3acc479a2 62 // Check which edge has generated the irq
mbed_official 157:90e3acc479a2 63 if ((gpio->IDR & pin) == 0) {
mbed_official 157:90e3acc479a2 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 157:90e3acc479a2 65 } else {
mbed_official 157:90e3acc479a2 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 157:90e3acc479a2 67 }
mbed_official 157:90e3acc479a2 68 }
mbed_official 157:90e3acc479a2 69
mbed_official 157:90e3acc479a2 70 static void gpio_irq0(void) {
mbed_official 157:90e3acc479a2 71 handle_interrupt_in(0); // EXTI line 0
mbed_official 157:90e3acc479a2 72 }
mbed_official 157:90e3acc479a2 73
mbed_official 157:90e3acc479a2 74 static void gpio_irq1(void) {
mbed_official 157:90e3acc479a2 75 handle_interrupt_in(1); // EXTI line 1
mbed_official 157:90e3acc479a2 76 }
mbed_official 157:90e3acc479a2 77
mbed_official 157:90e3acc479a2 78 static void gpio_irq2(void) {
mbed_official 157:90e3acc479a2 79 handle_interrupt_in(2); // EXTI line 2
mbed_official 157:90e3acc479a2 80 }
mbed_official 157:90e3acc479a2 81
mbed_official 157:90e3acc479a2 82 static void gpio_irq3(void) {
mbed_official 157:90e3acc479a2 83 handle_interrupt_in(3); // EXTI line 3
mbed_official 157:90e3acc479a2 84 }
mbed_official 157:90e3acc479a2 85
mbed_official 157:90e3acc479a2 86 static void gpio_irq4(void) {
mbed_official 157:90e3acc479a2 87 handle_interrupt_in(4); // EXTI line 4
mbed_official 157:90e3acc479a2 88 }
mbed_official 157:90e3acc479a2 89
mbed_official 157:90e3acc479a2 90 static void gpio_irq5(void) {
mbed_official 157:90e3acc479a2 91 handle_interrupt_in(5); // EXTI lines 5 to 9
mbed_official 157:90e3acc479a2 92 }
mbed_official 157:90e3acc479a2 93
mbed_official 157:90e3acc479a2 94 static void gpio_irq6(void) {
mbed_official 157:90e3acc479a2 95 handle_interrupt_in(6); // EXTI lines 10 to 15
mbed_official 157:90e3acc479a2 96 }
mbed_official 157:90e3acc479a2 97
mbed_official 157:90e3acc479a2 98 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 157:90e3acc479a2 99
mbed_official 157:90e3acc479a2 100 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 157:90e3acc479a2 101 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 157:90e3acc479a2 102 uint32_t vector = 0;
mbed_official 157:90e3acc479a2 103 uint32_t irq_index;
mbed_official 157:90e3acc479a2 104
mbed_official 157:90e3acc479a2 105 if (pin == NC) return -1;
mbed_official 157:90e3acc479a2 106
mbed_official 157:90e3acc479a2 107 uint32_t port_index = STM_PORT(pin);
mbed_official 157:90e3acc479a2 108 uint32_t pin_index = STM_PIN(pin);
mbed_official 157:90e3acc479a2 109
mbed_official 157:90e3acc479a2 110 // Select irq number and interrupt routine
mbed_official 157:90e3acc479a2 111 switch (pin_index) {
mbed_official 157:90e3acc479a2 112 case 0:
mbed_official 157:90e3acc479a2 113 irq_n = EXTI0_IRQn;
mbed_official 157:90e3acc479a2 114 vector = (uint32_t)&gpio_irq0;
mbed_official 157:90e3acc479a2 115 irq_index = 0;
mbed_official 157:90e3acc479a2 116 break;
mbed_official 157:90e3acc479a2 117 case 1:
mbed_official 157:90e3acc479a2 118 irq_n = EXTI1_IRQn;
mbed_official 157:90e3acc479a2 119 vector = (uint32_t)&gpio_irq1;
mbed_official 157:90e3acc479a2 120 irq_index = 1;
mbed_official 157:90e3acc479a2 121 break;
mbed_official 157:90e3acc479a2 122 case 2:
mbed_official 157:90e3acc479a2 123 irq_n = EXTI2_TS_IRQn;
mbed_official 157:90e3acc479a2 124 vector = (uint32_t)&gpio_irq2;
mbed_official 157:90e3acc479a2 125 irq_index = 2;
mbed_official 157:90e3acc479a2 126 break;
mbed_official 157:90e3acc479a2 127 case 3:
mbed_official 157:90e3acc479a2 128 irq_n = EXTI3_IRQn;
mbed_official 157:90e3acc479a2 129 vector = (uint32_t)&gpio_irq3;
mbed_official 157:90e3acc479a2 130 irq_index = 3;
mbed_official 157:90e3acc479a2 131 break;
mbed_official 157:90e3acc479a2 132 case 4:
mbed_official 157:90e3acc479a2 133 irq_n = EXTI4_IRQn;
mbed_official 157:90e3acc479a2 134 vector = (uint32_t)&gpio_irq4;
mbed_official 157:90e3acc479a2 135 irq_index = 4;
mbed_official 157:90e3acc479a2 136 break;
mbed_official 157:90e3acc479a2 137 case 5:
mbed_official 157:90e3acc479a2 138 case 6:
mbed_official 157:90e3acc479a2 139 case 7:
mbed_official 157:90e3acc479a2 140 case 8:
mbed_official 157:90e3acc479a2 141 case 9:
mbed_official 157:90e3acc479a2 142 irq_n = EXTI9_5_IRQn;
mbed_official 157:90e3acc479a2 143 vector = (uint32_t)&gpio_irq5;
mbed_official 157:90e3acc479a2 144 irq_index = 5;
mbed_official 157:90e3acc479a2 145 break;
mbed_official 157:90e3acc479a2 146 case 10:
mbed_official 157:90e3acc479a2 147 case 11:
mbed_official 157:90e3acc479a2 148 case 12:
mbed_official 157:90e3acc479a2 149 case 13:
mbed_official 157:90e3acc479a2 150 case 14:
mbed_official 157:90e3acc479a2 151 case 15:
mbed_official 157:90e3acc479a2 152 irq_n = EXTI15_10_IRQn;
mbed_official 157:90e3acc479a2 153 vector = (uint32_t)&gpio_irq6;
mbed_official 157:90e3acc479a2 154 irq_index = 6;
mbed_official 157:90e3acc479a2 155 break;
mbed_official 157:90e3acc479a2 156 default:
mbed_official 157:90e3acc479a2 157 error("This pin is not supported with InterruptIn.\n");
mbed_official 157:90e3acc479a2 158 return -1;
mbed_official 157:90e3acc479a2 159 }
mbed_official 157:90e3acc479a2 160
mbed_official 157:90e3acc479a2 161 // Enable GPIO clock
mbed_official 157:90e3acc479a2 162 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 157:90e3acc479a2 163
mbed_official 157:90e3acc479a2 164 // Enable SYSCFG clock
mbed_official 157:90e3acc479a2 165 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 157:90e3acc479a2 166
mbed_official 157:90e3acc479a2 167 // Connect EXTI line to pin
mbed_official 157:90e3acc479a2 168 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 157:90e3acc479a2 169
mbed_official 157:90e3acc479a2 170 // Configure EXTI line
mbed_official 157:90e3acc479a2 171 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 157:90e3acc479a2 172 EXTI_InitStructure.EXTI_Line = pin_index;
mbed_official 157:90e3acc479a2 173 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 157:90e3acc479a2 174 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 157:90e3acc479a2 175 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 157:90e3acc479a2 176 EXTI_Init(&EXTI_InitStructure);
mbed_official 157:90e3acc479a2 177
mbed_official 157:90e3acc479a2 178 // Enable and set EXTI interrupt to the lowest priority
mbed_official 157:90e3acc479a2 179 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 157:90e3acc479a2 180 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 157:90e3acc479a2 181 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 157:90e3acc479a2 182 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 157:90e3acc479a2 183 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 157:90e3acc479a2 184 NVIC_Init(&NVIC_InitStructure);
mbed_official 157:90e3acc479a2 185
mbed_official 157:90e3acc479a2 186 NVIC_SetVector(irq_n, vector);
mbed_official 157:90e3acc479a2 187 NVIC_EnableIRQ(irq_n);
mbed_official 157:90e3acc479a2 188
mbed_official 157:90e3acc479a2 189 // Save informations for future use
mbed_official 157:90e3acc479a2 190 obj->irq_n = irq_n;
mbed_official 157:90e3acc479a2 191 obj->irq_index = irq_index;
mbed_official 157:90e3acc479a2 192 obj->event = EDGE_NONE;
mbed_official 157:90e3acc479a2 193 channel_ids[irq_index] = id;
mbed_official 157:90e3acc479a2 194 channel_gpio[irq_index] = gpio_add;
mbed_official 157:90e3acc479a2 195 channel_pin[irq_index] = pin_index;
mbed_official 157:90e3acc479a2 196
mbed_official 157:90e3acc479a2 197 irq_handler = handler;
mbed_official 157:90e3acc479a2 198
mbed_official 157:90e3acc479a2 199 return 0;
mbed_official 157:90e3acc479a2 200 }
mbed_official 157:90e3acc479a2 201
mbed_official 157:90e3acc479a2 202 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 157:90e3acc479a2 203 channel_ids[obj->irq_index] = 0;
mbed_official 157:90e3acc479a2 204 channel_gpio[obj->irq_index] = 0;
mbed_official 157:90e3acc479a2 205 channel_pin[obj->irq_index] = 0;
mbed_official 157:90e3acc479a2 206 // Disable EXTI line
mbed_official 157:90e3acc479a2 207 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 157:90e3acc479a2 208 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 157:90e3acc479a2 209 EXTI_Init(&EXTI_InitStructure);
mbed_official 157:90e3acc479a2 210 obj->event = EDGE_NONE;
mbed_official 157:90e3acc479a2 211 }
mbed_official 157:90e3acc479a2 212
mbed_official 157:90e3acc479a2 213 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 157:90e3acc479a2 214 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 157:90e3acc479a2 215
mbed_official 157:90e3acc479a2 216 EXTI_InitStructure.EXTI_Line = channel_pin[obj->irq_index];
mbed_official 157:90e3acc479a2 217 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 157:90e3acc479a2 218
mbed_official 157:90e3acc479a2 219 if (event == IRQ_RISE) {
mbed_official 157:90e3acc479a2 220 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 157:90e3acc479a2 221 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 157:90e3acc479a2 222 obj->event = EDGE_BOTH;
mbed_official 157:90e3acc479a2 223 } else { // NONE or RISE
mbed_official 157:90e3acc479a2 224 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 157:90e3acc479a2 225 obj->event = EDGE_RISE;
mbed_official 157:90e3acc479a2 226 }
mbed_official 157:90e3acc479a2 227 }
mbed_official 157:90e3acc479a2 228
mbed_official 157:90e3acc479a2 229 if (event == IRQ_FALL) {
mbed_official 157:90e3acc479a2 230 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 157:90e3acc479a2 231 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 157:90e3acc479a2 232 obj->event = EDGE_BOTH;
mbed_official 157:90e3acc479a2 233 } else { // NONE or FALL
mbed_official 157:90e3acc479a2 234 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 157:90e3acc479a2 235 obj->event = EDGE_FALL;
mbed_official 157:90e3acc479a2 236 }
mbed_official 157:90e3acc479a2 237 }
mbed_official 157:90e3acc479a2 238
mbed_official 157:90e3acc479a2 239 if (enable) {
mbed_official 157:90e3acc479a2 240 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 157:90e3acc479a2 241 } else {
mbed_official 157:90e3acc479a2 242 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 157:90e3acc479a2 243 }
mbed_official 157:90e3acc479a2 244
mbed_official 157:90e3acc479a2 245 EXTI_Init(&EXTI_InitStructure);
mbed_official 157:90e3acc479a2 246 }
mbed_official 157:90e3acc479a2 247
mbed_official 157:90e3acc479a2 248 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 157:90e3acc479a2 249 NVIC_EnableIRQ(obj->irq_n);
mbed_official 157:90e3acc479a2 250 }
mbed_official 157:90e3acc479a2 251
mbed_official 157:90e3acc479a2 252 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 157:90e3acc479a2 253 NVIC_DisableIRQ(obj->irq_n);
mbed_official 157:90e3acc479a2 254 obj->event = EDGE_NONE;
mbed_official 157:90e3acc479a2 255 }