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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/gpio_irq_api.c@125:23cc3068a9e4, 2014-03-19 (annotated)

Committer:
mbed_official
Date:
Wed Mar 19 10:15:22 2014 +0000
Revision:
125:23cc3068a9e4
Child:
135:067cc8ba23da
Synchronized with git revision ace35dfba3748c7cdc102eb38ec6b9e1067c3252



Full URL: https://github.com/mbedmicro/mbed/commit/ace35dfba3748c7cdc102eb38ec6b9e1067c3252/



[NUCLEO_F302R8] Add cmsis and hal files + change F401RE clock to 84MHz

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
mbed_official 125:23cc3068a9e4 33 #include "gpio_irq_api.h"
mbed_official 125:23cc3068a9e4 34 #include "pinmap.h"
mbed_official 125:23cc3068a9e4 35 #include "error.h"
mbed_official 125:23cc3068a9e4 36
mbed_official 125:23cc3068a9e4 37 #define EDGE_NONE (0)
mbed_official 125:23cc3068a9e4 38 #define EDGE_RISE (1)
mbed_official 125:23cc3068a9e4 39 #define EDGE_FALL (2)
mbed_official 125:23cc3068a9e4 40 #define EDGE_BOTH (3)
mbed_official 125:23cc3068a9e4 41
mbed_official 125:23cc3068a9e4 42 #define CHANNEL_NUM (7)
mbed_official 125:23cc3068a9e4 43
mbed_official 125:23cc3068a9e4 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 47
mbed_official 125:23cc3068a9e4 48 static gpio_irq_handler irq_handler;
mbed_official 125:23cc3068a9e4 49
mbed_official 125:23cc3068a9e4 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 125:23cc3068a9e4 51 // Retrieve the gpio and pin that generate the irq
mbed_official 125:23cc3068a9e4 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 125:23cc3068a9e4 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 125:23cc3068a9e4 54
mbed_official 125:23cc3068a9e4 55 // Clear interrupt flag
mbed_official 125:23cc3068a9e4 56 if (EXTI_GetITStatus(channel_pin[irq_index]) != RESET)
mbed_official 125:23cc3068a9e4 57 {
mbed_official 125:23cc3068a9e4 58 EXTI_ClearITPendingBit(channel_pin[irq_index]);
mbed_official 125:23cc3068a9e4 59 }
mbed_official 125:23cc3068a9e4 60
mbed_official 125:23cc3068a9e4 61 if (channel_ids[irq_index] == 0) return;
mbed_official 125:23cc3068a9e4 62
mbed_official 125:23cc3068a9e4 63 // Check which edge has generated the irq
mbed_official 125:23cc3068a9e4 64 if ((gpio->IDR & pin) == 0) {
mbed_official 125:23cc3068a9e4 65 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 125:23cc3068a9e4 66 }
mbed_official 125:23cc3068a9e4 67 else {
mbed_official 125:23cc3068a9e4 68 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 125:23cc3068a9e4 69 }
mbed_official 125:23cc3068a9e4 70 }
mbed_official 125:23cc3068a9e4 71
mbed_official 125:23cc3068a9e4 72 // The irq_index is passed to the function
mbed_official 125:23cc3068a9e4 73 static void gpio_irq0(void) {handle_interrupt_in(0);} // EXTI line 0
mbed_official 125:23cc3068a9e4 74 static void gpio_irq1(void) {handle_interrupt_in(1);} // EXTI line 1
mbed_official 125:23cc3068a9e4 75 static void gpio_irq2(void) {handle_interrupt_in(2);} // EXTI line 2
mbed_official 125:23cc3068a9e4 76 static void gpio_irq3(void) {handle_interrupt_in(3);} // EXTI line 3
mbed_official 125:23cc3068a9e4 77 static void gpio_irq4(void) {handle_interrupt_in(4);} // EXTI line 4
mbed_official 125:23cc3068a9e4 78 static void gpio_irq5(void) {handle_interrupt_in(5);} // EXTI lines 5 to 9
mbed_official 125:23cc3068a9e4 79 static void gpio_irq6(void) {handle_interrupt_in(6);} // EXTI lines 10 to 15
mbed_official 125:23cc3068a9e4 80
mbed_official 125:23cc3068a9e4 81 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 125:23cc3068a9e4 82
mbed_official 125:23cc3068a9e4 83 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 125:23cc3068a9e4 84 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 125:23cc3068a9e4 85 uint32_t vector = 0;
mbed_official 125:23cc3068a9e4 86 uint32_t irq_index;
mbed_official 125:23cc3068a9e4 87
mbed_official 125:23cc3068a9e4 88 if (pin == NC) return -1;
mbed_official 125:23cc3068a9e4 89
mbed_official 125:23cc3068a9e4 90 uint32_t port_index = STM_PORT(pin);
mbed_official 125:23cc3068a9e4 91 uint32_t pin_index = STM_PIN(pin);
mbed_official 125:23cc3068a9e4 92
mbed_official 125:23cc3068a9e4 93 // Select irq number and interrupt routine
mbed_official 125:23cc3068a9e4 94 switch (pin_index) {
mbed_official 125:23cc3068a9e4 95 case 0:
mbed_official 125:23cc3068a9e4 96 irq_n = EXTI0_IRQn;
mbed_official 125:23cc3068a9e4 97 vector = (uint32_t)&gpio_irq0;
mbed_official 125:23cc3068a9e4 98 irq_index = 0;
mbed_official 125:23cc3068a9e4 99 break;
mbed_official 125:23cc3068a9e4 100 case 1:
mbed_official 125:23cc3068a9e4 101 irq_n = EXTI1_IRQn;
mbed_official 125:23cc3068a9e4 102 vector = (uint32_t)&gpio_irq1;
mbed_official 125:23cc3068a9e4 103 irq_index = 1;
mbed_official 125:23cc3068a9e4 104 break;
mbed_official 125:23cc3068a9e4 105 case 2:
mbed_official 125:23cc3068a9e4 106 irq_n = EXTI2_TS_IRQn;
mbed_official 125:23cc3068a9e4 107 vector = (uint32_t)&gpio_irq2;
mbed_official 125:23cc3068a9e4 108 irq_index = 2;
mbed_official 125:23cc3068a9e4 109 break;
mbed_official 125:23cc3068a9e4 110 case 3:
mbed_official 125:23cc3068a9e4 111 irq_n = EXTI3_IRQn;
mbed_official 125:23cc3068a9e4 112 vector = (uint32_t)&gpio_irq3;
mbed_official 125:23cc3068a9e4 113 irq_index = 3;
mbed_official 125:23cc3068a9e4 114 break;
mbed_official 125:23cc3068a9e4 115 case 4:
mbed_official 125:23cc3068a9e4 116 irq_n = EXTI4_IRQn;
mbed_official 125:23cc3068a9e4 117 vector = (uint32_t)&gpio_irq4;
mbed_official 125:23cc3068a9e4 118 irq_index = 4;
mbed_official 125:23cc3068a9e4 119 break;
mbed_official 125:23cc3068a9e4 120 case 5:
mbed_official 125:23cc3068a9e4 121 case 6:
mbed_official 125:23cc3068a9e4 122 case 7:
mbed_official 125:23cc3068a9e4 123 case 8:
mbed_official 125:23cc3068a9e4 124 case 9:
mbed_official 125:23cc3068a9e4 125 irq_n = EXTI9_5_IRQn;
mbed_official 125:23cc3068a9e4 126 vector = (uint32_t)&gpio_irq5;
mbed_official 125:23cc3068a9e4 127 irq_index = 5;
mbed_official 125:23cc3068a9e4 128 break;
mbed_official 125:23cc3068a9e4 129 case 10:
mbed_official 125:23cc3068a9e4 130 case 11:
mbed_official 125:23cc3068a9e4 131 case 12:
mbed_official 125:23cc3068a9e4 132 case 13:
mbed_official 125:23cc3068a9e4 133 case 14:
mbed_official 125:23cc3068a9e4 134 case 15:
mbed_official 125:23cc3068a9e4 135 irq_n = EXTI15_10_IRQn;
mbed_official 125:23cc3068a9e4 136 vector = (uint32_t)&gpio_irq6;
mbed_official 125:23cc3068a9e4 137 irq_index = 6;
mbed_official 125:23cc3068a9e4 138 break;
mbed_official 125:23cc3068a9e4 139 default:
mbed_official 125:23cc3068a9e4 140 error("This pin is not supported with InterruptIn.\n");
mbed_official 125:23cc3068a9e4 141 return -1;
mbed_official 125:23cc3068a9e4 142 }
mbed_official 125:23cc3068a9e4 143
mbed_official 125:23cc3068a9e4 144 // Enable GPIO clock
mbed_official 125:23cc3068a9e4 145 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 125:23cc3068a9e4 146
mbed_official 125:23cc3068a9e4 147 // Enable SYSCFG clock
mbed_official 125:23cc3068a9e4 148 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 125:23cc3068a9e4 149
mbed_official 125:23cc3068a9e4 150 // Connect EXTI line to pin
mbed_official 125:23cc3068a9e4 151 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 125:23cc3068a9e4 152
mbed_official 125:23cc3068a9e4 153 // Configure EXTI line
mbed_official 125:23cc3068a9e4 154 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 125:23cc3068a9e4 155 EXTI_InitStructure.EXTI_Line = pin_index;
mbed_official 125:23cc3068a9e4 156 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 125:23cc3068a9e4 157 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 125:23cc3068a9e4 158 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 125:23cc3068a9e4 159 EXTI_Init(&EXTI_InitStructure);
mbed_official 125:23cc3068a9e4 160
mbed_official 125:23cc3068a9e4 161 // Enable and set EXTI interrupt to the lowest priority
mbed_official 125:23cc3068a9e4 162 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 125:23cc3068a9e4 163 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 125:23cc3068a9e4 164 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 125:23cc3068a9e4 165 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 125:23cc3068a9e4 166 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 125:23cc3068a9e4 167 NVIC_Init(&NVIC_InitStructure);
mbed_official 125:23cc3068a9e4 168
mbed_official 125:23cc3068a9e4 169 NVIC_SetVector(irq_n, vector);
mbed_official 125:23cc3068a9e4 170 NVIC_EnableIRQ(irq_n);
mbed_official 125:23cc3068a9e4 171
mbed_official 125:23cc3068a9e4 172 // Save informations for future use
mbed_official 125:23cc3068a9e4 173 obj->irq_n = irq_n;
mbed_official 125:23cc3068a9e4 174 obj->irq_index = irq_index;
mbed_official 125:23cc3068a9e4 175 obj->event = EDGE_NONE;
mbed_official 125:23cc3068a9e4 176 channel_ids[irq_index] = id;
mbed_official 125:23cc3068a9e4 177 channel_gpio[irq_index] = gpio_add;
mbed_official 125:23cc3068a9e4 178 channel_pin[irq_index] = pin_index;
mbed_official 125:23cc3068a9e4 179
mbed_official 125:23cc3068a9e4 180 irq_handler = handler;
mbed_official 125:23cc3068a9e4 181
mbed_official 125:23cc3068a9e4 182 return 0;
mbed_official 125:23cc3068a9e4 183 }
mbed_official 125:23cc3068a9e4 184
mbed_official 125:23cc3068a9e4 185 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 125:23cc3068a9e4 186 channel_ids[obj->irq_index] = 0;
mbed_official 125:23cc3068a9e4 187 channel_gpio[obj->irq_index] = 0;
mbed_official 125:23cc3068a9e4 188 channel_pin[obj->irq_index] = 0;
mbed_official 125:23cc3068a9e4 189 // Disable EXTI line
mbed_official 125:23cc3068a9e4 190 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 125:23cc3068a9e4 191 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 125:23cc3068a9e4 192 EXTI_Init(&EXTI_InitStructure);
mbed_official 125:23cc3068a9e4 193 obj->event = EDGE_NONE;
mbed_official 125:23cc3068a9e4 194 }
mbed_official 125:23cc3068a9e4 195
mbed_official 125:23cc3068a9e4 196 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 125:23cc3068a9e4 197 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 125:23cc3068a9e4 198
mbed_official 125:23cc3068a9e4 199 EXTI_InitStructure.EXTI_Line = channel_pin[obj->irq_index];
mbed_official 125:23cc3068a9e4 200 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 125:23cc3068a9e4 201
mbed_official 125:23cc3068a9e4 202 if (event == IRQ_RISE) {
mbed_official 125:23cc3068a9e4 203 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 125:23cc3068a9e4 204 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 125:23cc3068a9e4 205 obj->event = EDGE_BOTH;
mbed_official 125:23cc3068a9e4 206 }
mbed_official 125:23cc3068a9e4 207 else { // NONE or RISE
mbed_official 125:23cc3068a9e4 208 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 125:23cc3068a9e4 209 obj->event = EDGE_RISE;
mbed_official 125:23cc3068a9e4 210 }
mbed_official 125:23cc3068a9e4 211 }
mbed_official 125:23cc3068a9e4 212
mbed_official 125:23cc3068a9e4 213 if (event == IRQ_FALL) {
mbed_official 125:23cc3068a9e4 214 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 125:23cc3068a9e4 215 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 125:23cc3068a9e4 216 obj->event = EDGE_BOTH;
mbed_official 125:23cc3068a9e4 217 }
mbed_official 125:23cc3068a9e4 218 else { // NONE or FALL
mbed_official 125:23cc3068a9e4 219 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 125:23cc3068a9e4 220 obj->event = EDGE_FALL;
mbed_official 125:23cc3068a9e4 221 }
mbed_official 125:23cc3068a9e4 222 }
mbed_official 125:23cc3068a9e4 223
mbed_official 125:23cc3068a9e4 224 if (enable) {
mbed_official 125:23cc3068a9e4 225 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 125:23cc3068a9e4 226 }
mbed_official 125:23cc3068a9e4 227 else {
mbed_official 125:23cc3068a9e4 228 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 125:23cc3068a9e4 229 }
mbed_official 125:23cc3068a9e4 230
mbed_official 125:23cc3068a9e4 231 EXTI_Init(&EXTI_InitStructure);
mbed_official 125:23cc3068a9e4 232 }
mbed_official 125:23cc3068a9e4 233
mbed_official 125:23cc3068a9e4 234 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 125:23cc3068a9e4 235 NVIC_EnableIRQ(obj->irq_n);
mbed_official 125:23cc3068a9e4 236 }
mbed_official 125:23cc3068a9e4 237
mbed_official 125:23cc3068a9e4 238 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 125:23cc3068a9e4 239 NVIC_DisableIRQ(obj->irq_n);
mbed_official 125:23cc3068a9e4 240 obj->event = EDGE_NONE;
mbed_official 125:23cc3068a9e4 241 }