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targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/gpio_irq_api.c@60:142c6c6f5949, 2013-12-17 (annotated)

Committer:
mbed_official
Date:
Tue Dec 17 08:45:10 2013 +0000
Revision:
60:142c6c6f5949
Child:
70:c1fbde68b492
Synchronized with git revision 572b22395f1ebb513f4fbd423214cb39a18dc58b



Full URL: https://github.com/mbedmicro/mbed/commit/572b22395f1ebb513f4fbd423214cb39a18dc58b/



[NUCLEO_F103RB] InterruptIn, Sleep, RTC added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 60:142c6c6f5949 1 /* mbed Microcontroller Library
mbed_official 60:142c6c6f5949 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 60:142c6c6f5949 3 *
mbed_official 60:142c6c6f5949 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 60:142c6c6f5949 5 * you may not use this file except in compliance with the License.
mbed_official 60:142c6c6f5949 6 * You may obtain a copy of the License at
mbed_official 60:142c6c6f5949 7 *
mbed_official 60:142c6c6f5949 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 60:142c6c6f5949 9 *
mbed_official 60:142c6c6f5949 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 60:142c6c6f5949 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 60:142c6c6f5949 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 60:142c6c6f5949 13 * See the License for the specific language governing permissions and
mbed_official 60:142c6c6f5949 14 * limitations under the License.
mbed_official 60:142c6c6f5949 15 */
mbed_official 60:142c6c6f5949 16 #include <stddef.h>
mbed_official 60:142c6c6f5949 17 #include "cmsis.h"
mbed_official 60:142c6c6f5949 18
mbed_official 60:142c6c6f5949 19 #include "gpio_irq_api.h"
mbed_official 60:142c6c6f5949 20 #include "error.h"
mbed_official 60:142c6c6f5949 21
mbed_official 60:142c6c6f5949 22 #define EDGE_NONE (0)
mbed_official 60:142c6c6f5949 23 #define EDGE_RISE (1)
mbed_official 60:142c6c6f5949 24 #define EDGE_FALL (2)
mbed_official 60:142c6c6f5949 25 #define EDGE_BOTH (3)
mbed_official 60:142c6c6f5949 26
mbed_official 60:142c6c6f5949 27 #define CHANNEL_NUM (16)
mbed_official 60:142c6c6f5949 28
mbed_official 60:142c6c6f5949 29 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 60:142c6c6f5949 30
mbed_official 60:142c6c6f5949 31 static gpio_irq_handler irq_handler;
mbed_official 60:142c6c6f5949 32
mbed_official 60:142c6c6f5949 33 static void handle_interrupt_in(uint32_t channel) {
mbed_official 60:142c6c6f5949 34 if (channel_ids[channel] == 0) return;
mbed_official 60:142c6c6f5949 35
mbed_official 60:142c6c6f5949 36 uint32_t exti_line = (uint32_t)(1 << channel);
mbed_official 60:142c6c6f5949 37 if (EXTI_GetITStatus(exti_line) != RESET)
mbed_official 60:142c6c6f5949 38 {
mbed_official 60:142c6c6f5949 39 EXTI_ClearITPendingBit(exti_line);
mbed_official 60:142c6c6f5949 40 }
mbed_official 60:142c6c6f5949 41
mbed_official 60:142c6c6f5949 42 // Warning:
mbed_official 60:142c6c6f5949 43 // On this device we don't know if a rising or falling event occured.
mbed_official 60:142c6c6f5949 44 // In case both rise and fall events are set, only the FALL event will be reported.
mbed_official 60:142c6c6f5949 45 if (EXTI->FTSR & (uint32_t)(1 << channel)) {
mbed_official 60:142c6c6f5949 46 irq_handler(channel_ids[channel], IRQ_FALL);
mbed_official 60:142c6c6f5949 47 }
mbed_official 60:142c6c6f5949 48 else {
mbed_official 60:142c6c6f5949 49 irq_handler(channel_ids[channel], IRQ_RISE);
mbed_official 60:142c6c6f5949 50 }
mbed_official 60:142c6c6f5949 51 }
mbed_official 60:142c6c6f5949 52
mbed_official 60:142c6c6f5949 53 static void gpio_irq0(void) {handle_interrupt_in(0);}
mbed_official 60:142c6c6f5949 54 static void gpio_irq1(void) {handle_interrupt_in(1);}
mbed_official 60:142c6c6f5949 55 static void gpio_irq2(void) {handle_interrupt_in(2);}
mbed_official 60:142c6c6f5949 56 static void gpio_irq3(void) {handle_interrupt_in(3);}
mbed_official 60:142c6c6f5949 57 static void gpio_irq4(void) {handle_interrupt_in(4);}
mbed_official 60:142c6c6f5949 58 static void gpio_irq5(void) {handle_interrupt_in(5);}
mbed_official 60:142c6c6f5949 59 static void gpio_irq6(void) {handle_interrupt_in(6);}
mbed_official 60:142c6c6f5949 60 static void gpio_irq7(void) {handle_interrupt_in(7);}
mbed_official 60:142c6c6f5949 61 static void gpio_irq8(void) {handle_interrupt_in(8);}
mbed_official 60:142c6c6f5949 62 static void gpio_irq9(void) {handle_interrupt_in(9);}
mbed_official 60:142c6c6f5949 63 static void gpio_irq10(void) {handle_interrupt_in(10);}
mbed_official 60:142c6c6f5949 64 static void gpio_irq11(void) {handle_interrupt_in(11);}
mbed_official 60:142c6c6f5949 65 static void gpio_irq12(void) {handle_interrupt_in(12);}
mbed_official 60:142c6c6f5949 66 static void gpio_irq13(void) {handle_interrupt_in(13);}
mbed_official 60:142c6c6f5949 67 static void gpio_irq14(void) {handle_interrupt_in(14);}
mbed_official 60:142c6c6f5949 68 static void gpio_irq15(void) {handle_interrupt_in(15);}
mbed_official 60:142c6c6f5949 69
mbed_official 60:142c6c6f5949 70 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 60:142c6c6f5949 71 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 60:142c6c6f5949 72 uint32_t vector = 0;
mbed_official 60:142c6c6f5949 73
mbed_official 60:142c6c6f5949 74 if (pin == NC) return -1;
mbed_official 60:142c6c6f5949 75
mbed_official 60:142c6c6f5949 76 uint32_t pin_number = (uint32_t)pin;
mbed_official 60:142c6c6f5949 77 uint32_t pin_index = (pin_number & 0xF);
mbed_official 60:142c6c6f5949 78 uint32_t port_index = (pin_number >> 4);
mbed_official 60:142c6c6f5949 79
mbed_official 60:142c6c6f5949 80 // Select irq number and vector
mbed_official 60:142c6c6f5949 81 switch (pin_index) {
mbed_official 60:142c6c6f5949 82 case 0:
mbed_official 60:142c6c6f5949 83 irq_n = EXTI0_IRQn;
mbed_official 60:142c6c6f5949 84 vector = (uint32_t)&gpio_irq0;
mbed_official 60:142c6c6f5949 85 break;
mbed_official 60:142c6c6f5949 86 case 1:
mbed_official 60:142c6c6f5949 87 irq_n = EXTI1_IRQn;
mbed_official 60:142c6c6f5949 88 vector = (uint32_t)&gpio_irq1;
mbed_official 60:142c6c6f5949 89 break;
mbed_official 60:142c6c6f5949 90 case 2:
mbed_official 60:142c6c6f5949 91 irq_n = EXTI2_IRQn;
mbed_official 60:142c6c6f5949 92 vector = (uint32_t)&gpio_irq2;
mbed_official 60:142c6c6f5949 93 break;
mbed_official 60:142c6c6f5949 94 case 3:
mbed_official 60:142c6c6f5949 95 irq_n = EXTI3_IRQn;
mbed_official 60:142c6c6f5949 96 vector = (uint32_t)&gpio_irq3;
mbed_official 60:142c6c6f5949 97 break;
mbed_official 60:142c6c6f5949 98 case 4:
mbed_official 60:142c6c6f5949 99 irq_n = EXTI4_IRQn;
mbed_official 60:142c6c6f5949 100 vector = (uint32_t)&gpio_irq4;
mbed_official 60:142c6c6f5949 101 break;
mbed_official 60:142c6c6f5949 102 case 5:
mbed_official 60:142c6c6f5949 103 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 104 vector = (uint32_t)&gpio_irq5;
mbed_official 60:142c6c6f5949 105 break;
mbed_official 60:142c6c6f5949 106 case 6:
mbed_official 60:142c6c6f5949 107 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 108 vector = (uint32_t)&gpio_irq6;
mbed_official 60:142c6c6f5949 109 break;
mbed_official 60:142c6c6f5949 110 case 7:
mbed_official 60:142c6c6f5949 111 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 112 vector = (uint32_t)&gpio_irq7;
mbed_official 60:142c6c6f5949 113 break;
mbed_official 60:142c6c6f5949 114 case 8:
mbed_official 60:142c6c6f5949 115 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 116 vector = (uint32_t)&gpio_irq8;
mbed_official 60:142c6c6f5949 117 break;
mbed_official 60:142c6c6f5949 118 case 9:
mbed_official 60:142c6c6f5949 119 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 120 vector = (uint32_t)&gpio_irq9;
mbed_official 60:142c6c6f5949 121 break;
mbed_official 60:142c6c6f5949 122 case 10:
mbed_official 60:142c6c6f5949 123 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 124 vector = (uint32_t)&gpio_irq10;
mbed_official 60:142c6c6f5949 125 break;
mbed_official 60:142c6c6f5949 126 case 11:
mbed_official 60:142c6c6f5949 127 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 128 vector = (uint32_t)&gpio_irq11;
mbed_official 60:142c6c6f5949 129 break;
mbed_official 60:142c6c6f5949 130 case 12:
mbed_official 60:142c6c6f5949 131 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 132 vector = (uint32_t)&gpio_irq12;
mbed_official 60:142c6c6f5949 133 break;
mbed_official 60:142c6c6f5949 134 case 13:
mbed_official 60:142c6c6f5949 135 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 136 vector = (uint32_t)&gpio_irq13;
mbed_official 60:142c6c6f5949 137 break;
mbed_official 60:142c6c6f5949 138 case 14:
mbed_official 60:142c6c6f5949 139 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 140 vector = (uint32_t)&gpio_irq14;
mbed_official 60:142c6c6f5949 141 break;
mbed_official 60:142c6c6f5949 142 case 15:
mbed_official 60:142c6c6f5949 143 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 144 vector = (uint32_t)&gpio_irq15;
mbed_official 60:142c6c6f5949 145 break;
mbed_official 60:142c6c6f5949 146 default:
mbed_official 60:142c6c6f5949 147 return -1;
mbed_official 60:142c6c6f5949 148 }
mbed_official 60:142c6c6f5949 149
mbed_official 60:142c6c6f5949 150 // Enable GPIO and AFIO clocks
mbed_official 60:142c6c6f5949 151 RCC_APB2PeriphClockCmd((uint32_t)(RCC_APB2Periph_GPIOA << port_index), ENABLE);
mbed_official 60:142c6c6f5949 152 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
mbed_official 60:142c6c6f5949 153
mbed_official 60:142c6c6f5949 154 // Connect EXTI line to pin
mbed_official 60:142c6c6f5949 155 GPIO_EXTILineConfig(port_index, pin_index);
mbed_official 60:142c6c6f5949 156
mbed_official 60:142c6c6f5949 157 // Configure EXTI line
mbed_official 60:142c6c6f5949 158 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 159 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 60:142c6c6f5949 160 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 161 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 162 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 163 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 164
mbed_official 60:142c6c6f5949 165 // Enable and set EXTI interrupt to the lowest priority
mbed_official 60:142c6c6f5949 166 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 60:142c6c6f5949 167 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 60:142c6c6f5949 168 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 60:142c6c6f5949 169 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 60:142c6c6f5949 170 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 60:142c6c6f5949 171 NVIC_Init(&NVIC_InitStructure);
mbed_official 60:142c6c6f5949 172
mbed_official 60:142c6c6f5949 173 NVIC_SetVector(irq_n, vector);
mbed_official 60:142c6c6f5949 174 NVIC_EnableIRQ(irq_n);
mbed_official 60:142c6c6f5949 175
mbed_official 60:142c6c6f5949 176 // Save for future use
mbed_official 60:142c6c6f5949 177 obj->ch = pin_index;
mbed_official 60:142c6c6f5949 178 obj->irq_n = irq_n;
mbed_official 60:142c6c6f5949 179 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 180
mbed_official 60:142c6c6f5949 181 channel_ids[obj->ch] = id;
mbed_official 60:142c6c6f5949 182
mbed_official 60:142c6c6f5949 183 irq_handler = handler;
mbed_official 60:142c6c6f5949 184
mbed_official 60:142c6c6f5949 185 return 0;
mbed_official 60:142c6c6f5949 186 }
mbed_official 60:142c6c6f5949 187
mbed_official 60:142c6c6f5949 188 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 189 channel_ids[obj->ch] = 0;
mbed_official 60:142c6c6f5949 190 // Disable EXTI line
mbed_official 60:142c6c6f5949 191 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 192 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 193 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 194 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 195 }
mbed_official 60:142c6c6f5949 196
mbed_official 60:142c6c6f5949 197 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 60:142c6c6f5949 198 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 199
mbed_official 60:142c6c6f5949 200 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << obj->ch);
mbed_official 60:142c6c6f5949 201 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 202
mbed_official 60:142c6c6f5949 203 if (event == IRQ_RISE) {
mbed_official 60:142c6c6f5949 204 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 60:142c6c6f5949 205 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 60:142c6c6f5949 206 obj->event = EDGE_BOTH;
mbed_official 60:142c6c6f5949 207 }
mbed_official 60:142c6c6f5949 208 else { // NONE or RISE
mbed_official 60:142c6c6f5949 209 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 60:142c6c6f5949 210 obj->event = EDGE_RISE;
mbed_official 60:142c6c6f5949 211 }
mbed_official 60:142c6c6f5949 212 }
mbed_official 60:142c6c6f5949 213
mbed_official 60:142c6c6f5949 214 if (event == IRQ_FALL) {
mbed_official 60:142c6c6f5949 215 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 60:142c6c6f5949 216 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 60:142c6c6f5949 217 obj->event = EDGE_BOTH;
mbed_official 60:142c6c6f5949 218 }
mbed_official 60:142c6c6f5949 219 else { // NONE or FALL
mbed_official 60:142c6c6f5949 220 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 221 obj->event = EDGE_FALL;
mbed_official 60:142c6c6f5949 222 }
mbed_official 60:142c6c6f5949 223 }
mbed_official 60:142c6c6f5949 224
mbed_official 60:142c6c6f5949 225 if (enable) {
mbed_official 60:142c6c6f5949 226 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 227 }
mbed_official 60:142c6c6f5949 228 else {
mbed_official 60:142c6c6f5949 229 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 60:142c6c6f5949 230 }
mbed_official 60:142c6c6f5949 231
mbed_official 60:142c6c6f5949 232 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 233 }
mbed_official 60:142c6c6f5949 234
mbed_official 60:142c6c6f5949 235 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 236 NVIC_EnableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 237 }
mbed_official 60:142c6c6f5949 238
mbed_official 60:142c6c6f5949 239 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 240 NVIC_DisableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 241 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 242 }