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targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/gpio_irq_api.c@156:38b9eb24e1d1, 2014-04-11 (annotated)

Committer:
mbed_official
Date:
Fri Apr 11 00:30:06 2014 +0100
Revision:
156:38b9eb24e1d1
Parent:
84:f54042cbc282
Child:
174:8bb9f3a33240
Synchronized with git revision 0356bc49c0096cd3b3f15222e147af3e51211ea1



Full URL: https://github.com/mbedmicro/mbed/commit/0356bc49c0096cd3b3f15222e147af3e51211ea1/



[NUCLEO_xxx] Add more interrupt_in pins

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 60:142c6c6f5949 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 60:142c6c6f5949 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 60:142c6c6f5949 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 60:142c6c6f5949 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 60:142c6c6f5949 29 */
mbed_official 60:142c6c6f5949 30 #include <stddef.h>
mbed_official 60:142c6c6f5949 31 #include "cmsis.h"
mbed_official 60:142c6c6f5949 32
mbed_official 60:142c6c6f5949 33 #include "gpio_irq_api.h"
mbed_official 76:aeb1df146756 34 #include "pinmap.h"
mbed_official 60:142c6c6f5949 35 #include "error.h"
mbed_official 60:142c6c6f5949 36
mbed_official 60:142c6c6f5949 37 #define EDGE_NONE (0)
mbed_official 60:142c6c6f5949 38 #define EDGE_RISE (1)
mbed_official 60:142c6c6f5949 39 #define EDGE_FALL (2)
mbed_official 60:142c6c6f5949 40 #define EDGE_BOTH (3)
mbed_official 60:142c6c6f5949 41
mbed_official 156:38b9eb24e1d1 42 #define CHANNEL_NUM (7)
mbed_official 60:142c6c6f5949 43
mbed_official 156:38b9eb24e1d1 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 156:38b9eb24e1d1 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 156:38b9eb24e1d1 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 60:142c6c6f5949 47
mbed_official 60:142c6c6f5949 48 static gpio_irq_handler irq_handler;
mbed_official 60:142c6c6f5949 49
mbed_official 76:aeb1df146756 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 76:aeb1df146756 51 // Retrieve the gpio and pin that generate the irq
mbed_official 76:aeb1df146756 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 76:aeb1df146756 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 156:38b9eb24e1d1 54
mbed_official 76:aeb1df146756 55 // Clear interrupt flag
mbed_official 76:aeb1df146756 56 if (EXTI_GetITStatus(pin) != RESET)
mbed_official 60:142c6c6f5949 57 {
mbed_official 76:aeb1df146756 58 EXTI_ClearITPendingBit(pin);
mbed_official 60:142c6c6f5949 59 }
mbed_official 60:142c6c6f5949 60
mbed_official 76:aeb1df146756 61 if (channel_ids[irq_index] == 0) return;
mbed_official 76:aeb1df146756 62
mbed_official 76:aeb1df146756 63 // Check which edge has generated the irq
mbed_official 76:aeb1df146756 64 if ((gpio->IDR & pin) == 0) {
mbed_official 76:aeb1df146756 65 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 60:142c6c6f5949 66 }
mbed_official 76:aeb1df146756 67 else {
mbed_official 76:aeb1df146756 68 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 60:142c6c6f5949 69 }
mbed_official 60:142c6c6f5949 70 }
mbed_official 60:142c6c6f5949 71
mbed_official 76:aeb1df146756 72 // The irq_index is passed to the function
mbed_official 156:38b9eb24e1d1 73 static void gpio_irq0(void) {handle_interrupt_in(0);} // EXTI line 0
mbed_official 156:38b9eb24e1d1 74 static void gpio_irq1(void) {handle_interrupt_in(1);} // EXTI line 1
mbed_official 156:38b9eb24e1d1 75 static void gpio_irq2(void) {handle_interrupt_in(2);} // EXTI line 2
mbed_official 156:38b9eb24e1d1 76 static void gpio_irq3(void) {handle_interrupt_in(3);} // EXTI line 3
mbed_official 156:38b9eb24e1d1 77 static void gpio_irq4(void) {handle_interrupt_in(4);} // EXTI line 4
mbed_official 156:38b9eb24e1d1 78 static void gpio_irq5(void) {handle_interrupt_in(5);} // EXTI lines 5 to 9
mbed_official 156:38b9eb24e1d1 79 static void gpio_irq6(void) {handle_interrupt_in(6);} // EXTI lines 10 to 15
mbed_official 76:aeb1df146756 80
mbed_official 76:aeb1df146756 81 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 60:142c6c6f5949 82
mbed_official 60:142c6c6f5949 83 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 76:aeb1df146756 84 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 60:142c6c6f5949 85 uint32_t vector = 0;
mbed_official 76:aeb1df146756 86 uint32_t irq_index;
mbed_official 76:aeb1df146756 87
mbed_official 60:142c6c6f5949 88 if (pin == NC) return -1;
mbed_official 60:142c6c6f5949 89
mbed_official 76:aeb1df146756 90 uint32_t port_index = STM_PORT(pin);
mbed_official 76:aeb1df146756 91 uint32_t pin_index = STM_PIN(pin);
mbed_official 76:aeb1df146756 92
mbed_official 76:aeb1df146756 93 // Select irq number and interrupt routine
mbed_official 156:38b9eb24e1d1 94 switch (pin_index) {
mbed_official 156:38b9eb24e1d1 95 case 0:
mbed_official 156:38b9eb24e1d1 96 irq_n = EXTI0_IRQn;
mbed_official 60:142c6c6f5949 97 vector = (uint32_t)&gpio_irq0;
mbed_official 76:aeb1df146756 98 irq_index = 0;
mbed_official 60:142c6c6f5949 99 break;
mbed_official 156:38b9eb24e1d1 100 case 1:
mbed_official 156:38b9eb24e1d1 101 irq_n = EXTI1_IRQn;
mbed_official 76:aeb1df146756 102 vector = (uint32_t)&gpio_irq1;
mbed_official 76:aeb1df146756 103 irq_index = 1;
mbed_official 60:142c6c6f5949 104 break;
mbed_official 156:38b9eb24e1d1 105 case 2:
mbed_official 156:38b9eb24e1d1 106 irq_n = EXTI2_IRQn;
mbed_official 76:aeb1df146756 107 vector = (uint32_t)&gpio_irq2;
mbed_official 76:aeb1df146756 108 irq_index = 2;
mbed_official 76:aeb1df146756 109 break;
mbed_official 156:38b9eb24e1d1 110 case 3:
mbed_official 156:38b9eb24e1d1 111 irq_n = EXTI3_IRQn;
mbed_official 76:aeb1df146756 112 vector = (uint32_t)&gpio_irq3;
mbed_official 76:aeb1df146756 113 irq_index = 3;
mbed_official 60:142c6c6f5949 114 break;
mbed_official 156:38b9eb24e1d1 115 case 4:
mbed_official 156:38b9eb24e1d1 116 irq_n = EXTI4_IRQn;
mbed_official 156:38b9eb24e1d1 117 vector = (uint32_t)&gpio_irq4;
mbed_official 156:38b9eb24e1d1 118 irq_index = 4;
mbed_official 156:38b9eb24e1d1 119 break;
mbed_official 156:38b9eb24e1d1 120 case 5:
mbed_official 156:38b9eb24e1d1 121 case 6:
mbed_official 156:38b9eb24e1d1 122 case 7:
mbed_official 156:38b9eb24e1d1 123 case 8:
mbed_official 156:38b9eb24e1d1 124 case 9:
mbed_official 156:38b9eb24e1d1 125 irq_n = EXTI9_5_IRQn;
mbed_official 156:38b9eb24e1d1 126 vector = (uint32_t)&gpio_irq5;
mbed_official 156:38b9eb24e1d1 127 irq_index = 5;
mbed_official 156:38b9eb24e1d1 128 break;
mbed_official 156:38b9eb24e1d1 129 case 10:
mbed_official 156:38b9eb24e1d1 130 case 11:
mbed_official 156:38b9eb24e1d1 131 case 12:
mbed_official 156:38b9eb24e1d1 132 case 13:
mbed_official 156:38b9eb24e1d1 133 case 14:
mbed_official 156:38b9eb24e1d1 134 case 15:
mbed_official 156:38b9eb24e1d1 135 irq_n = EXTI15_10_IRQn;
mbed_official 156:38b9eb24e1d1 136 vector = (uint32_t)&gpio_irq6;
mbed_official 156:38b9eb24e1d1 137 irq_index = 6;
mbed_official 156:38b9eb24e1d1 138 break;
mbed_official 60:142c6c6f5949 139 default:
mbed_official 156:38b9eb24e1d1 140 error("InterruptIn error: pin not supported.\n");
mbed_official 60:142c6c6f5949 141 return -1;
mbed_official 60:142c6c6f5949 142 }
mbed_official 76:aeb1df146756 143
mbed_official 76:aeb1df146756 144 // Enable GPIO clock
mbed_official 76:aeb1df146756 145 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 60:142c6c6f5949 146
mbed_official 76:aeb1df146756 147 // Enable AFIO clock
mbed_official 60:142c6c6f5949 148 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
mbed_official 76:aeb1df146756 149
mbed_official 60:142c6c6f5949 150 // Connect EXTI line to pin
mbed_official 60:142c6c6f5949 151 GPIO_EXTILineConfig(port_index, pin_index);
mbed_official 60:142c6c6f5949 152
mbed_official 60:142c6c6f5949 153 // Configure EXTI line
mbed_official 60:142c6c6f5949 154 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 155 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 60:142c6c6f5949 156 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 157 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 158 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 159 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 160
mbed_official 60:142c6c6f5949 161 // Enable and set EXTI interrupt to the lowest priority
mbed_official 60:142c6c6f5949 162 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 60:142c6c6f5949 163 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 60:142c6c6f5949 164 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 60:142c6c6f5949 165 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 60:142c6c6f5949 166 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 60:142c6c6f5949 167 NVIC_Init(&NVIC_InitStructure);
mbed_official 60:142c6c6f5949 168
mbed_official 60:142c6c6f5949 169 NVIC_SetVector(irq_n, vector);
mbed_official 60:142c6c6f5949 170 NVIC_EnableIRQ(irq_n);
mbed_official 60:142c6c6f5949 171
mbed_official 76:aeb1df146756 172 // Save informations for future use
mbed_official 60:142c6c6f5949 173 obj->irq_n = irq_n;
mbed_official 76:aeb1df146756 174 obj->irq_index = irq_index;
mbed_official 60:142c6c6f5949 175 obj->event = EDGE_NONE;
mbed_official 76:aeb1df146756 176 channel_ids[irq_index] = id;
mbed_official 76:aeb1df146756 177 channel_gpio[irq_index] = gpio_add;
mbed_official 76:aeb1df146756 178 channel_pin[irq_index] = pin_index;
mbed_official 60:142c6c6f5949 179
mbed_official 60:142c6c6f5949 180 irq_handler = handler;
mbed_official 60:142c6c6f5949 181
mbed_official 60:142c6c6f5949 182 return 0;
mbed_official 60:142c6c6f5949 183 }
mbed_official 60:142c6c6f5949 184
mbed_official 60:142c6c6f5949 185 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 76:aeb1df146756 186 channel_ids[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 187 channel_gpio[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 188 channel_pin[obj->irq_index] = 0;
mbed_official 60:142c6c6f5949 189 // Disable EXTI line
mbed_official 60:142c6c6f5949 190 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 191 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 192 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 193 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 194 }
mbed_official 60:142c6c6f5949 195
mbed_official 60:142c6c6f5949 196 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 60:142c6c6f5949 197 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 198
mbed_official 76:aeb1df146756 199 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 76:aeb1df146756 200
mbed_official 76:aeb1df146756 201 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 60:142c6c6f5949 202 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 203
mbed_official 60:142c6c6f5949 204 if (event == IRQ_RISE) {
mbed_official 60:142c6c6f5949 205 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 60:142c6c6f5949 206 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 60:142c6c6f5949 207 obj->event = EDGE_BOTH;
mbed_official 60:142c6c6f5949 208 }
mbed_official 60:142c6c6f5949 209 else { // NONE or RISE
mbed_official 60:142c6c6f5949 210 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 60:142c6c6f5949 211 obj->event = EDGE_RISE;
mbed_official 60:142c6c6f5949 212 }
mbed_official 60:142c6c6f5949 213 }
mbed_official 60:142c6c6f5949 214
mbed_official 60:142c6c6f5949 215 if (event == IRQ_FALL) {
mbed_official 60:142c6c6f5949 216 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 60:142c6c6f5949 217 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 60:142c6c6f5949 218 obj->event = EDGE_BOTH;
mbed_official 60:142c6c6f5949 219 }
mbed_official 60:142c6c6f5949 220 else { // NONE or FALL
mbed_official 60:142c6c6f5949 221 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 222 obj->event = EDGE_FALL;
mbed_official 60:142c6c6f5949 223 }
mbed_official 60:142c6c6f5949 224 }
mbed_official 60:142c6c6f5949 225
mbed_official 60:142c6c6f5949 226 if (enable) {
mbed_official 60:142c6c6f5949 227 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 228 }
mbed_official 60:142c6c6f5949 229 else {
mbed_official 60:142c6c6f5949 230 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 60:142c6c6f5949 231 }
mbed_official 60:142c6c6f5949 232
mbed_official 60:142c6c6f5949 233 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 234 }
mbed_official 60:142c6c6f5949 235
mbed_official 60:142c6c6f5949 236 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 237 NVIC_EnableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 238 }
mbed_official 60:142c6c6f5949 239
mbed_official 60:142c6c6f5949 240 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 241 NVIC_DisableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 242 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 243 }