GameOpener / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/gpio_irq_api.c@402:09075a3b15e3, 2014-11-14 (annotated)

Committer:
mbed_official
Date:
Fri Nov 14 09:00:07 2014 +0000
Revision:
402:09075a3b15e3
Parent:
331:098575c6d2c8
Child:
454:a07e52520545
Synchronized with git revision dffeedc96e731e30785ca4a7842fb9769412bea1



Full URL: https://github.com/mbedmicro/mbed/commit/dffeedc96e731e30785ca4a7842fb9769412bea1/



Targets: add USBTX and USBRX pin definitions for targets that don't provide them

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 #include "gpio_irq_api.h"
mbed_official 76:aeb1df146756 33 #include "pinmap.h"
mbed_official 285:31249416b6f9 34 #include "mbed_error.h"
mbed_official 60:142c6c6f5949 35
mbed_official 60:142c6c6f5949 36 #define EDGE_NONE (0)
mbed_official 60:142c6c6f5949 37 #define EDGE_RISE (1)
mbed_official 60:142c6c6f5949 38 #define EDGE_FALL (2)
mbed_official 60:142c6c6f5949 39 #define EDGE_BOTH (3)
mbed_official 60:142c6c6f5949 40
mbed_official 156:38b9eb24e1d1 41 #define CHANNEL_NUM (7)
mbed_official 60:142c6c6f5949 42
mbed_official 156:38b9eb24e1d1 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 156:38b9eb24e1d1 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 156:38b9eb24e1d1 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 60:142c6c6f5949 46
mbed_official 60:142c6c6f5949 47 static gpio_irq_handler irq_handler;
mbed_official 60:142c6c6f5949 48
mbed_official 402:09075a3b15e3 49 static void handle_interrupt_in(uint32_t irq_index)
mbed_official 402:09075a3b15e3 50 {
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 174:8bb9f3a33240 56 if (EXTI_GetITStatus(pin) != RESET) {
mbed_official 76:aeb1df146756 57 EXTI_ClearITPendingBit(pin);
mbed_official 60:142c6c6f5949 58 }
mbed_official 174:8bb9f3a33240 59
mbed_official 76:aeb1df146756 60 if (channel_ids[irq_index] == 0) return;
mbed_official 174:8bb9f3a33240 61
mbed_official 76:aeb1df146756 62 // Check which edge has generated the irq
mbed_official 76:aeb1df146756 63 if ((gpio->IDR & pin) == 0) {
mbed_official 76:aeb1df146756 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 174:8bb9f3a33240 65 } else {
mbed_official 76:aeb1df146756 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 60:142c6c6f5949 67 }
mbed_official 60:142c6c6f5949 68 }
mbed_official 60:142c6c6f5949 69
mbed_official 76:aeb1df146756 70 // The irq_index is passed to the function
mbed_official 402:09075a3b15e3 71 static void gpio_irq0(void)
mbed_official 402:09075a3b15e3 72 {
mbed_official 174:8bb9f3a33240 73 handle_interrupt_in(0); // EXTI line 0
mbed_official 174:8bb9f3a33240 74 }
mbed_official 402:09075a3b15e3 75 static void gpio_irq1(void)
mbed_official 402:09075a3b15e3 76 {
mbed_official 174:8bb9f3a33240 77 handle_interrupt_in(1); // EXTI line 1
mbed_official 174:8bb9f3a33240 78 }
mbed_official 402:09075a3b15e3 79 static void gpio_irq2(void)
mbed_official 402:09075a3b15e3 80 {
mbed_official 174:8bb9f3a33240 81 handle_interrupt_in(2); // EXTI line 2
mbed_official 174:8bb9f3a33240 82 }
mbed_official 402:09075a3b15e3 83 static void gpio_irq3(void)
mbed_official 402:09075a3b15e3 84 {
mbed_official 174:8bb9f3a33240 85 handle_interrupt_in(3); // EXTI line 3
mbed_official 174:8bb9f3a33240 86 }
mbed_official 402:09075a3b15e3 87 static void gpio_irq4(void)
mbed_official 402:09075a3b15e3 88 {
mbed_official 174:8bb9f3a33240 89 handle_interrupt_in(4); // EXTI line 4
mbed_official 174:8bb9f3a33240 90 }
mbed_official 402:09075a3b15e3 91 static void gpio_irq5(void)
mbed_official 402:09075a3b15e3 92 {
mbed_official 174:8bb9f3a33240 93 handle_interrupt_in(5); // EXTI lines 5 to 9
mbed_official 174:8bb9f3a33240 94 }
mbed_official 402:09075a3b15e3 95 static void gpio_irq6(void)
mbed_official 402:09075a3b15e3 96 {
mbed_official 174:8bb9f3a33240 97 handle_interrupt_in(6); // EXTI lines 10 to 15
mbed_official 174:8bb9f3a33240 98 }
mbed_official 76:aeb1df146756 99
mbed_official 76:aeb1df146756 100 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 60:142c6c6f5949 101
mbed_official 402:09075a3b15e3 102 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 402:09075a3b15e3 103 {
mbed_official 76:aeb1df146756 104 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 60:142c6c6f5949 105 uint32_t vector = 0;
mbed_official 76:aeb1df146756 106 uint32_t irq_index;
mbed_official 76:aeb1df146756 107
mbed_official 60:142c6c6f5949 108 if (pin == NC) return -1;
mbed_official 60:142c6c6f5949 109
mbed_official 76:aeb1df146756 110 uint32_t port_index = STM_PORT(pin);
mbed_official 76:aeb1df146756 111 uint32_t pin_index = STM_PIN(pin);
mbed_official 76:aeb1df146756 112
mbed_official 76:aeb1df146756 113 // Select irq number and interrupt routine
mbed_official 156:38b9eb24e1d1 114 switch (pin_index) {
mbed_official 156:38b9eb24e1d1 115 case 0:
mbed_official 156:38b9eb24e1d1 116 irq_n = EXTI0_IRQn;
mbed_official 60:142c6c6f5949 117 vector = (uint32_t)&gpio_irq0;
mbed_official 76:aeb1df146756 118 irq_index = 0;
mbed_official 60:142c6c6f5949 119 break;
mbed_official 156:38b9eb24e1d1 120 case 1:
mbed_official 156:38b9eb24e1d1 121 irq_n = EXTI1_IRQn;
mbed_official 76:aeb1df146756 122 vector = (uint32_t)&gpio_irq1;
mbed_official 76:aeb1df146756 123 irq_index = 1;
mbed_official 60:142c6c6f5949 124 break;
mbed_official 156:38b9eb24e1d1 125 case 2:
mbed_official 156:38b9eb24e1d1 126 irq_n = EXTI2_IRQn;
mbed_official 76:aeb1df146756 127 vector = (uint32_t)&gpio_irq2;
mbed_official 76:aeb1df146756 128 irq_index = 2;
mbed_official 76:aeb1df146756 129 break;
mbed_official 156:38b9eb24e1d1 130 case 3:
mbed_official 156:38b9eb24e1d1 131 irq_n = EXTI3_IRQn;
mbed_official 76:aeb1df146756 132 vector = (uint32_t)&gpio_irq3;
mbed_official 76:aeb1df146756 133 irq_index = 3;
mbed_official 60:142c6c6f5949 134 break;
mbed_official 156:38b9eb24e1d1 135 case 4:
mbed_official 156:38b9eb24e1d1 136 irq_n = EXTI4_IRQn;
mbed_official 156:38b9eb24e1d1 137 vector = (uint32_t)&gpio_irq4;
mbed_official 156:38b9eb24e1d1 138 irq_index = 4;
mbed_official 156:38b9eb24e1d1 139 break;
mbed_official 156:38b9eb24e1d1 140 case 5:
mbed_official 156:38b9eb24e1d1 141 case 6:
mbed_official 156:38b9eb24e1d1 142 case 7:
mbed_official 156:38b9eb24e1d1 143 case 8:
mbed_official 156:38b9eb24e1d1 144 case 9:
mbed_official 156:38b9eb24e1d1 145 irq_n = EXTI9_5_IRQn;
mbed_official 156:38b9eb24e1d1 146 vector = (uint32_t)&gpio_irq5;
mbed_official 156:38b9eb24e1d1 147 irq_index = 5;
mbed_official 156:38b9eb24e1d1 148 break;
mbed_official 156:38b9eb24e1d1 149 case 10:
mbed_official 156:38b9eb24e1d1 150 case 11:
mbed_official 156:38b9eb24e1d1 151 case 12:
mbed_official 156:38b9eb24e1d1 152 case 13:
mbed_official 156:38b9eb24e1d1 153 case 14:
mbed_official 156:38b9eb24e1d1 154 case 15:
mbed_official 156:38b9eb24e1d1 155 irq_n = EXTI15_10_IRQn;
mbed_official 156:38b9eb24e1d1 156 vector = (uint32_t)&gpio_irq6;
mbed_official 156:38b9eb24e1d1 157 irq_index = 6;
mbed_official 156:38b9eb24e1d1 158 break;
mbed_official 60:142c6c6f5949 159 default:
mbed_official 156:38b9eb24e1d1 160 error("InterruptIn error: pin not supported.\n");
mbed_official 60:142c6c6f5949 161 return -1;
mbed_official 60:142c6c6f5949 162 }
mbed_official 76:aeb1df146756 163
mbed_official 76:aeb1df146756 164 // Enable GPIO clock
mbed_official 76:aeb1df146756 165 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 174:8bb9f3a33240 166
mbed_official 76:aeb1df146756 167 // Enable AFIO clock
mbed_official 60:142c6c6f5949 168 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
mbed_official 76:aeb1df146756 169
mbed_official 60:142c6c6f5949 170 // Connect EXTI line to pin
mbed_official 60:142c6c6f5949 171 GPIO_EXTILineConfig(port_index, pin_index);
mbed_official 60:142c6c6f5949 172
mbed_official 60:142c6c6f5949 173 // Configure EXTI line
mbed_official 174:8bb9f3a33240 174 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 175 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 60:142c6c6f5949 176 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 177 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 178 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 179 EXTI_Init(&EXTI_InitStructure);
mbed_official 174:8bb9f3a33240 180
mbed_official 60:142c6c6f5949 181 // Enable and set EXTI interrupt to the lowest priority
mbed_official 60:142c6c6f5949 182 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 60:142c6c6f5949 183 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 60:142c6c6f5949 184 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 60:142c6c6f5949 185 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 60:142c6c6f5949 186 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 60:142c6c6f5949 187 NVIC_Init(&NVIC_InitStructure);
mbed_official 174:8bb9f3a33240 188
mbed_official 60:142c6c6f5949 189 NVIC_SetVector(irq_n, vector);
mbed_official 60:142c6c6f5949 190 NVIC_EnableIRQ(irq_n);
mbed_official 60:142c6c6f5949 191
mbed_official 76:aeb1df146756 192 // Save informations for future use
mbed_official 60:142c6c6f5949 193 obj->irq_n = irq_n;
mbed_official 76:aeb1df146756 194 obj->irq_index = irq_index;
mbed_official 60:142c6c6f5949 195 obj->event = EDGE_NONE;
mbed_official 76:aeb1df146756 196 channel_ids[irq_index] = id;
mbed_official 76:aeb1df146756 197 channel_gpio[irq_index] = gpio_add;
mbed_official 76:aeb1df146756 198 channel_pin[irq_index] = pin_index;
mbed_official 174:8bb9f3a33240 199
mbed_official 174:8bb9f3a33240 200 irq_handler = handler;
mbed_official 174:8bb9f3a33240 201
mbed_official 60:142c6c6f5949 202 return 0;
mbed_official 60:142c6c6f5949 203 }
mbed_official 60:142c6c6f5949 204
mbed_official 402:09075a3b15e3 205 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 402:09075a3b15e3 206 {
mbed_official 76:aeb1df146756 207 channel_ids[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 208 channel_gpio[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 209 channel_pin[obj->irq_index] = 0;
mbed_official 60:142c6c6f5949 210 // Disable EXTI line
mbed_official 60:142c6c6f5949 211 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 212 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 174:8bb9f3a33240 213 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 214 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 215 }
mbed_official 60:142c6c6f5949 216
mbed_official 402:09075a3b15e3 217 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 402:09075a3b15e3 218 {
mbed_official 60:142c6c6f5949 219 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 174:8bb9f3a33240 220
mbed_official 76:aeb1df146756 221 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 76:aeb1df146756 222
mbed_official 76:aeb1df146756 223 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 60:142c6c6f5949 224 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 331:098575c6d2c8 225 EXTI_InitStructure.EXTI_LineCmd = DISABLE; // Default
mbed_official 174:8bb9f3a33240 226
mbed_official 331:098575c6d2c8 227 if (enable) {
mbed_official 331:098575c6d2c8 228 if (event == IRQ_RISE) {
mbed_official 331:098575c6d2c8 229 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 331:098575c6d2c8 230 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 331:098575c6d2c8 231 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 331:098575c6d2c8 232 obj->event = EDGE_BOTH;
mbed_official 331:098575c6d2c8 233 } else { // NONE or RISE
mbed_official 331:098575c6d2c8 234 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 331:098575c6d2c8 235 obj->event = EDGE_RISE;
mbed_official 331:098575c6d2c8 236 }
mbed_official 331:098575c6d2c8 237 }
mbed_official 331:098575c6d2c8 238 if (event == IRQ_FALL) {
mbed_official 331:098575c6d2c8 239 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 331:098575c6d2c8 240 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 331:098575c6d2c8 241 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 331:098575c6d2c8 242 obj->event = EDGE_BOTH;
mbed_official 331:098575c6d2c8 243 } else { // NONE or FALL
mbed_official 331:098575c6d2c8 244 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 331:098575c6d2c8 245 obj->event = EDGE_FALL;
mbed_official 331:098575c6d2c8 246 }
mbed_official 60:142c6c6f5949 247 }
mbed_official 402:09075a3b15e3 248 } else { // Disable
mbed_official 331:098575c6d2c8 249 if (event == IRQ_RISE) {
mbed_official 331:098575c6d2c8 250 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 331:098575c6d2c8 251 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 331:098575c6d2c8 252 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 331:098575c6d2c8 253 obj->event = EDGE_FALL;
mbed_official 331:098575c6d2c8 254 } else { // NONE or RISE
mbed_official 331:098575c6d2c8 255 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 331:098575c6d2c8 256 obj->event = EDGE_NONE;
mbed_official 331:098575c6d2c8 257 }
mbed_official 60:142c6c6f5949 258 }
mbed_official 331:098575c6d2c8 259 if (event == IRQ_FALL) {
mbed_official 331:098575c6d2c8 260 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 331:098575c6d2c8 261 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 331:098575c6d2c8 262 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 331:098575c6d2c8 263 obj->event = EDGE_RISE;
mbed_official 331:098575c6d2c8 264 } else { // NONE or FALL
mbed_official 331:098575c6d2c8 265 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 331:098575c6d2c8 266 obj->event = EDGE_NONE;
mbed_official 331:098575c6d2c8 267 }
mbed_official 402:09075a3b15e3 268 }
mbed_official 60:142c6c6f5949 269 }
mbed_official 174:8bb9f3a33240 270
mbed_official 60:142c6c6f5949 271 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 272 }
mbed_official 60:142c6c6f5949 273
mbed_official 402:09075a3b15e3 274 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 402:09075a3b15e3 275 {
mbed_official 60:142c6c6f5949 276 NVIC_EnableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 277 }
mbed_official 60:142c6c6f5949 278
mbed_official 402:09075a3b15e3 279 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 402:09075a3b15e3 280 {
mbed_official 60:142c6c6f5949 281 NVIC_DisableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 282 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 283 }