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_F100RB/gpio_irq_api.c@163:995a0017c116, 2014-04-22 (annotated)

Committer:
mbed_official
Date:
Tue Apr 22 13:45:07 2014 +0100
Revision:
163:995a0017c116
Parent:
162:937d965048d3
Child:
250:a49055e7a707
Synchronized with git revision 7b8a9ba0969dc98ff13a84ecb54b4111b92adfbf



Full URL: https://github.com/mbedmicro/mbed/commit/7b8a9ba0969dc98ff13a84ecb54b4111b92adfbf/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 126:549ba18ddd81 1 /* mbed Microcontroller Library
mbed_official 126:549ba18ddd81 2 *******************************************************************************
mbed_official 126:549ba18ddd81 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 126:549ba18ddd81 4 * All rights reserved.
mbed_official 126:549ba18ddd81 5 *
mbed_official 126:549ba18ddd81 6 * Redistribution and use in source and binary forms, with or without
mbed_official 126:549ba18ddd81 7 * modification, are permitted provided that the following conditions are met:
mbed_official 126:549ba18ddd81 8 *
mbed_official 126:549ba18ddd81 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 126:549ba18ddd81 10 * this list of conditions and the following disclaimer.
mbed_official 126:549ba18ddd81 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 126:549ba18ddd81 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 126:549ba18ddd81 13 * and/or other materials provided with the distribution.
mbed_official 126:549ba18ddd81 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 126:549ba18ddd81 15 * may be used to endorse or promote products derived from this software
mbed_official 126:549ba18ddd81 16 * without specific prior written permission.
mbed_official 126:549ba18ddd81 17 *
mbed_official 126:549ba18ddd81 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 126:549ba18ddd81 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 126:549ba18ddd81 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 126:549ba18ddd81 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 126:549ba18ddd81 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 126:549ba18ddd81 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 126:549ba18ddd81 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 126:549ba18ddd81 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 126:549ba18ddd81 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 126:549ba18ddd81 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 126:549ba18ddd81 28 *******************************************************************************
mbed_official 126:549ba18ddd81 29 */
mbed_official 126:549ba18ddd81 30 #include <stddef.h>
mbed_official 126:549ba18ddd81 31 #include "cmsis.h"
mbed_official 126:549ba18ddd81 32
mbed_official 126:549ba18ddd81 33 #include "gpio_irq_api.h"
mbed_official 126:549ba18ddd81 34 #include "pinmap.h"
mbed_official 126:549ba18ddd81 35 #include "error.h"
mbed_official 126:549ba18ddd81 36
mbed_official 126:549ba18ddd81 37 #define EDGE_NONE (0)
mbed_official 126:549ba18ddd81 38 #define EDGE_RISE (1)
mbed_official 126:549ba18ddd81 39 #define EDGE_FALL (2)
mbed_official 126:549ba18ddd81 40 #define EDGE_BOTH (3)
mbed_official 126:549ba18ddd81 41
mbed_official 163:995a0017c116 42 #define CHANNEL_NUM (16)
mbed_official 126:549ba18ddd81 43
mbed_official 163:995a0017c116 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
mbed_official 163:995a0017c116 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
mbed_official 163:995a0017c116 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
mbed_official 126:549ba18ddd81 47
mbed_official 126:549ba18ddd81 48 static gpio_irq_handler irq_handler;
mbed_official 126:549ba18ddd81 49
mbed_official 126:549ba18ddd81 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 163:995a0017c116 51 //if irq_index==5 loop exti 5 to 9
mbed_official 163:995a0017c116 52 //if irq_index==10 loop exti 10 to 15
mbed_official 163:995a0017c116 53 //else exti loop one irq_index
mbed_official 163:995a0017c116 54 uint32_t to_irq_index=(irq_index==5)?9:((irq_index==10)?15:irq_index);
mbed_official 163:995a0017c116 55 GPIO_TypeDef *gpio;
mbed_official 163:995a0017c116 56 uint32_t pin;
mbed_official 163:995a0017c116 57 do{
mbed_official 163:995a0017c116 58 // Retrieve the gpio and pin that generate the irq
mbed_official 163:995a0017c116 59 gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 163:995a0017c116 60 pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 163:995a0017c116 61 // Clear interrupt flag
mbed_official 163:995a0017c116 62 if (EXTI_GetITStatus(pin) != RESET)
mbed_official 163:995a0017c116 63 {
mbed_official 163:995a0017c116 64 EXTI_ClearITPendingBit(pin);
mbed_official 163:995a0017c116 65 if (channel_ids[irq_index] == 0) return;
mbed_official 163:995a0017c116 66 // Check which edge has generated the irq
mbed_official 163:995a0017c116 67 if ((gpio->IDR & pin) == 0) {
mbed_official 163:995a0017c116 68 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 163:995a0017c116 69 } else {
mbed_official 163:995a0017c116 70 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 163:995a0017c116 71 }
mbed_official 163:995a0017c116 72 }
mbed_official 163:995a0017c116 73 }while(irq_index++ < to_irq_index);
mbed_official 163:995a0017c116 74 }
mbed_official 162:937d965048d3 75
mbed_official 126:549ba18ddd81 76
mbed_official 126:549ba18ddd81 77 // The irq_index is passed to the function
mbed_official 162:937d965048d3 78 static void gpio_irq0(void) {handle_interrupt_in(0);} // EXTI line 0
mbed_official 162:937d965048d3 79 static void gpio_irq1(void) {handle_interrupt_in(1);} // EXTI line 1
mbed_official 162:937d965048d3 80 static void gpio_irq2(void) {handle_interrupt_in(2);} // EXTI line 2
mbed_official 162:937d965048d3 81 static void gpio_irq3(void) {handle_interrupt_in(3);} // EXTI line 3
mbed_official 162:937d965048d3 82 static void gpio_irq4(void) {handle_interrupt_in(4);} // EXTI line 4
mbed_official 162:937d965048d3 83 static void gpio_irq5(void) {handle_interrupt_in(5);} // EXTI lines 5 to 9
mbed_official 163:995a0017c116 84 static void gpio_irq6(void) {handle_interrupt_in(10);} // EXTI lines 10 to 15
mbed_official 126:549ba18ddd81 85
mbed_official 126:549ba18ddd81 86 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 126:549ba18ddd81 87
mbed_official 126:549ba18ddd81 88 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 126:549ba18ddd81 89 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 126:549ba18ddd81 90 uint32_t vector = 0;
mbed_official 126:549ba18ddd81 91 uint32_t irq_index;
mbed_official 126:549ba18ddd81 92
mbed_official 126:549ba18ddd81 93 if (pin == NC) return -1;
mbed_official 126:549ba18ddd81 94
mbed_official 126:549ba18ddd81 95 uint32_t port_index = STM_PORT(pin);
mbed_official 126:549ba18ddd81 96 uint32_t pin_index = STM_PIN(pin);
mbed_official 126:549ba18ddd81 97
mbed_official 126:549ba18ddd81 98 // Select irq number and interrupt routine
mbed_official 162:937d965048d3 99 switch (pin_index) {
mbed_official 162:937d965048d3 100 case 0:
mbed_official 162:937d965048d3 101 irq_n = EXTI0_IRQn;
mbed_official 126:549ba18ddd81 102 vector = (uint32_t)&gpio_irq0;
mbed_official 126:549ba18ddd81 103 irq_index = 0;
mbed_official 126:549ba18ddd81 104 break;
mbed_official 162:937d965048d3 105 case 1:
mbed_official 162:937d965048d3 106 irq_n = EXTI1_IRQn;
mbed_official 126:549ba18ddd81 107 vector = (uint32_t)&gpio_irq1;
mbed_official 126:549ba18ddd81 108 irq_index = 1;
mbed_official 126:549ba18ddd81 109 break;
mbed_official 162:937d965048d3 110 case 2:
mbed_official 162:937d965048d3 111 irq_n = EXTI2_IRQn;
mbed_official 126:549ba18ddd81 112 vector = (uint32_t)&gpio_irq2;
mbed_official 126:549ba18ddd81 113 irq_index = 2;
mbed_official 126:549ba18ddd81 114 break;
mbed_official 162:937d965048d3 115 case 3:
mbed_official 162:937d965048d3 116 irq_n = EXTI3_IRQn;
mbed_official 126:549ba18ddd81 117 vector = (uint32_t)&gpio_irq3;
mbed_official 126:549ba18ddd81 118 irq_index = 3;
mbed_official 126:549ba18ddd81 119 break;
mbed_official 162:937d965048d3 120 case 4:
mbed_official 162:937d965048d3 121 irq_n = EXTI4_IRQn;
mbed_official 162:937d965048d3 122 vector = (uint32_t)&gpio_irq4;
mbed_official 162:937d965048d3 123 irq_index = 4;
mbed_official 162:937d965048d3 124 break;
mbed_official 162:937d965048d3 125 case 5:
mbed_official 162:937d965048d3 126 case 6:
mbed_official 162:937d965048d3 127 case 7:
mbed_official 162:937d965048d3 128 case 8:
mbed_official 162:937d965048d3 129 case 9:
mbed_official 162:937d965048d3 130 irq_n = EXTI9_5_IRQn;
mbed_official 162:937d965048d3 131 vector = (uint32_t)&gpio_irq5;
mbed_official 163:995a0017c116 132 irq_index = pin_index;
mbed_official 162:937d965048d3 133 break;
mbed_official 162:937d965048d3 134 case 10:
mbed_official 162:937d965048d3 135 case 11:
mbed_official 162:937d965048d3 136 case 12:
mbed_official 162:937d965048d3 137 case 13:
mbed_official 162:937d965048d3 138 case 14:
mbed_official 162:937d965048d3 139 case 15:
mbed_official 162:937d965048d3 140 irq_n = EXTI15_10_IRQn;
mbed_official 162:937d965048d3 141 vector = (uint32_t)&gpio_irq6;
mbed_official 163:995a0017c116 142 irq_index = pin_index;
mbed_official 162:937d965048d3 143 break;
mbed_official 126:549ba18ddd81 144 default:
mbed_official 162:937d965048d3 145 error("InterruptIn error: pin not supported.\n");
mbed_official 126:549ba18ddd81 146 return -1;
mbed_official 126:549ba18ddd81 147 }
mbed_official 126:549ba18ddd81 148 // Enable GPIO clock
mbed_official 126:549ba18ddd81 149 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 126:549ba18ddd81 150
mbed_official 126:549ba18ddd81 151 // Enable AFIO clock
mbed_official 126:549ba18ddd81 152 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
mbed_official 126:549ba18ddd81 153
mbed_official 126:549ba18ddd81 154 // Connect EXTI line to pin
mbed_official 126:549ba18ddd81 155 GPIO_EXTILineConfig(port_index, pin_index);
mbed_official 126:549ba18ddd81 156
mbed_official 126:549ba18ddd81 157 // Configure EXTI line
mbed_official 126:549ba18ddd81 158 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 126:549ba18ddd81 159 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 126:549ba18ddd81 160 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 126:549ba18ddd81 161 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 126:549ba18ddd81 162 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 126:549ba18ddd81 163 EXTI_Init(&EXTI_InitStructure);
mbed_official 126:549ba18ddd81 164
mbed_official 126:549ba18ddd81 165 // Enable and set EXTI interrupt to the lowest priority
mbed_official 126:549ba18ddd81 166 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 126:549ba18ddd81 167 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 126:549ba18ddd81 168 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 126:549ba18ddd81 169 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 126:549ba18ddd81 170 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 126:549ba18ddd81 171 NVIC_Init(&NVIC_InitStructure);
mbed_official 126:549ba18ddd81 172
mbed_official 126:549ba18ddd81 173 NVIC_SetVector(irq_n, vector);
mbed_official 126:549ba18ddd81 174 NVIC_EnableIRQ(irq_n);
mbed_official 126:549ba18ddd81 175
mbed_official 126:549ba18ddd81 176 // Save informations for future use
mbed_official 126:549ba18ddd81 177 obj->irq_n = irq_n;
mbed_official 126:549ba18ddd81 178 obj->irq_index = irq_index;
mbed_official 126:549ba18ddd81 179 obj->event = EDGE_NONE;
mbed_official 126:549ba18ddd81 180 channel_ids[irq_index] = id;
mbed_official 126:549ba18ddd81 181 channel_gpio[irq_index] = gpio_add;
mbed_official 126:549ba18ddd81 182 channel_pin[irq_index] = pin_index;
mbed_official 126:549ba18ddd81 183
mbed_official 126:549ba18ddd81 184 irq_handler = handler;
mbed_official 126:549ba18ddd81 185
mbed_official 126:549ba18ddd81 186 return 0;
mbed_official 126:549ba18ddd81 187 }
mbed_official 126:549ba18ddd81 188
mbed_official 126:549ba18ddd81 189 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 126:549ba18ddd81 190 channel_ids[obj->irq_index] = 0;
mbed_official 126:549ba18ddd81 191 channel_gpio[obj->irq_index] = 0;
mbed_official 126:549ba18ddd81 192 channel_pin[obj->irq_index] = 0;
mbed_official 126:549ba18ddd81 193 // Disable EXTI line
mbed_official 126:549ba18ddd81 194 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 126:549ba18ddd81 195 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 126:549ba18ddd81 196 EXTI_Init(&EXTI_InitStructure);
mbed_official 126:549ba18ddd81 197 obj->event = EDGE_NONE;
mbed_official 126:549ba18ddd81 198 }
mbed_official 126:549ba18ddd81 199
mbed_official 126:549ba18ddd81 200 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 126:549ba18ddd81 201 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 126:549ba18ddd81 202
mbed_official 126:549ba18ddd81 203 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 126:549ba18ddd81 204
mbed_official 126:549ba18ddd81 205 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 126:549ba18ddd81 206 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 126:549ba18ddd81 207
mbed_official 126:549ba18ddd81 208 if (event == IRQ_RISE) {
mbed_official 126:549ba18ddd81 209 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 126:549ba18ddd81 210 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 126:549ba18ddd81 211 obj->event = EDGE_BOTH;
mbed_official 126:549ba18ddd81 212 }
mbed_official 126:549ba18ddd81 213 else { // NONE or RISE
mbed_official 126:549ba18ddd81 214 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 126:549ba18ddd81 215 obj->event = EDGE_RISE;
mbed_official 126:549ba18ddd81 216 }
mbed_official 126:549ba18ddd81 217 }
mbed_official 126:549ba18ddd81 218
mbed_official 126:549ba18ddd81 219 if (event == IRQ_FALL) {
mbed_official 126:549ba18ddd81 220 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 126:549ba18ddd81 221 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 126:549ba18ddd81 222 obj->event = EDGE_BOTH;
mbed_official 126:549ba18ddd81 223 }
mbed_official 126:549ba18ddd81 224 else { // NONE or FALL
mbed_official 126:549ba18ddd81 225 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 126:549ba18ddd81 226 obj->event = EDGE_FALL;
mbed_official 126:549ba18ddd81 227 }
mbed_official 126:549ba18ddd81 228 }
mbed_official 126:549ba18ddd81 229
mbed_official 126:549ba18ddd81 230 if (enable) {
mbed_official 126:549ba18ddd81 231 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 126:549ba18ddd81 232 }
mbed_official 126:549ba18ddd81 233 else {
mbed_official 126:549ba18ddd81 234 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 126:549ba18ddd81 235 }
mbed_official 126:549ba18ddd81 236
mbed_official 126:549ba18ddd81 237 EXTI_Init(&EXTI_InitStructure);
mbed_official 126:549ba18ddd81 238 }
mbed_official 126:549ba18ddd81 239
mbed_official 126:549ba18ddd81 240 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 126:549ba18ddd81 241 NVIC_EnableIRQ(obj->irq_n);
mbed_official 126:549ba18ddd81 242 }
mbed_official 126:549ba18ddd81 243
mbed_official 126:549ba18ddd81 244 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 126:549ba18ddd81 245 NVIC_DisableIRQ(obj->irq_n);
mbed_official 126:549ba18ddd81 246 obj->event = EDGE_NONE;
mbed_official 126:549ba18ddd81 247 }