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_NUCLEO_F103RB/gpio_irq_api.c@70:c1fbde68b492, 2014-01-07 (annotated)

Committer:
mbed_official
Date:
Tue Jan 07 11:00:05 2014 +0000
Revision:
70:c1fbde68b492
Parent:
60:142c6c6f5949
Child:
76:aeb1df146756
Synchronized with git revision 3f438a307904431f2782db3c8fa49946b9fc1d85



Full URL: https://github.com/mbedmicro/mbed/commit/3f438a307904431f2782db3c8fa49946b9fc1d85/



[NUCLEO_F103RB] license text changed + sleep hal updated

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 60:142c6c6f5949 34 #include "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 60:142c6c6f5949 41 #define CHANNEL_NUM (16)
mbed_official 60:142c6c6f5949 42
mbed_official 60:142c6c6f5949 43 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 60:142c6c6f5949 44
mbed_official 60:142c6c6f5949 45 static gpio_irq_handler irq_handler;
mbed_official 60:142c6c6f5949 46
mbed_official 60:142c6c6f5949 47 static void handle_interrupt_in(uint32_t channel) {
mbed_official 60:142c6c6f5949 48 if (channel_ids[channel] == 0) return;
mbed_official 60:142c6c6f5949 49
mbed_official 60:142c6c6f5949 50 uint32_t exti_line = (uint32_t)(1 << channel);
mbed_official 60:142c6c6f5949 51 if (EXTI_GetITStatus(exti_line) != RESET)
mbed_official 60:142c6c6f5949 52 {
mbed_official 60:142c6c6f5949 53 EXTI_ClearITPendingBit(exti_line);
mbed_official 60:142c6c6f5949 54 }
mbed_official 60:142c6c6f5949 55
mbed_official 60:142c6c6f5949 56 // Warning:
mbed_official 60:142c6c6f5949 57 // On this device we don't know if a rising or falling event occured.
mbed_official 60:142c6c6f5949 58 // In case both rise and fall events are set, only the FALL event will be reported.
mbed_official 60:142c6c6f5949 59 if (EXTI->FTSR & (uint32_t)(1 << channel)) {
mbed_official 60:142c6c6f5949 60 irq_handler(channel_ids[channel], IRQ_FALL);
mbed_official 60:142c6c6f5949 61 }
mbed_official 60:142c6c6f5949 62 else {
mbed_official 60:142c6c6f5949 63 irq_handler(channel_ids[channel], IRQ_RISE);
mbed_official 60:142c6c6f5949 64 }
mbed_official 60:142c6c6f5949 65 }
mbed_official 60:142c6c6f5949 66
mbed_official 60:142c6c6f5949 67 static void gpio_irq0(void) {handle_interrupt_in(0);}
mbed_official 60:142c6c6f5949 68 static void gpio_irq1(void) {handle_interrupt_in(1);}
mbed_official 60:142c6c6f5949 69 static void gpio_irq2(void) {handle_interrupt_in(2);}
mbed_official 60:142c6c6f5949 70 static void gpio_irq3(void) {handle_interrupt_in(3);}
mbed_official 60:142c6c6f5949 71 static void gpio_irq4(void) {handle_interrupt_in(4);}
mbed_official 60:142c6c6f5949 72 static void gpio_irq5(void) {handle_interrupt_in(5);}
mbed_official 60:142c6c6f5949 73 static void gpio_irq6(void) {handle_interrupt_in(6);}
mbed_official 60:142c6c6f5949 74 static void gpio_irq7(void) {handle_interrupt_in(7);}
mbed_official 60:142c6c6f5949 75 static void gpio_irq8(void) {handle_interrupt_in(8);}
mbed_official 60:142c6c6f5949 76 static void gpio_irq9(void) {handle_interrupt_in(9);}
mbed_official 60:142c6c6f5949 77 static void gpio_irq10(void) {handle_interrupt_in(10);}
mbed_official 60:142c6c6f5949 78 static void gpio_irq11(void) {handle_interrupt_in(11);}
mbed_official 60:142c6c6f5949 79 static void gpio_irq12(void) {handle_interrupt_in(12);}
mbed_official 60:142c6c6f5949 80 static void gpio_irq13(void) {handle_interrupt_in(13);}
mbed_official 60:142c6c6f5949 81 static void gpio_irq14(void) {handle_interrupt_in(14);}
mbed_official 60:142c6c6f5949 82 static void gpio_irq15(void) {handle_interrupt_in(15);}
mbed_official 60:142c6c6f5949 83
mbed_official 60:142c6c6f5949 84 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 60:142c6c6f5949 85 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 60:142c6c6f5949 86 uint32_t vector = 0;
mbed_official 60:142c6c6f5949 87
mbed_official 60:142c6c6f5949 88 if (pin == NC) return -1;
mbed_official 60:142c6c6f5949 89
mbed_official 60:142c6c6f5949 90 uint32_t pin_number = (uint32_t)pin;
mbed_official 60:142c6c6f5949 91 uint32_t pin_index = (pin_number & 0xF);
mbed_official 60:142c6c6f5949 92 uint32_t port_index = (pin_number >> 4);
mbed_official 60:142c6c6f5949 93
mbed_official 60:142c6c6f5949 94 // Select irq number and vector
mbed_official 60:142c6c6f5949 95 switch (pin_index) {
mbed_official 60:142c6c6f5949 96 case 0:
mbed_official 60:142c6c6f5949 97 irq_n = EXTI0_IRQn;
mbed_official 60:142c6c6f5949 98 vector = (uint32_t)&gpio_irq0;
mbed_official 60:142c6c6f5949 99 break;
mbed_official 60:142c6c6f5949 100 case 1:
mbed_official 60:142c6c6f5949 101 irq_n = EXTI1_IRQn;
mbed_official 60:142c6c6f5949 102 vector = (uint32_t)&gpio_irq1;
mbed_official 60:142c6c6f5949 103 break;
mbed_official 60:142c6c6f5949 104 case 2:
mbed_official 60:142c6c6f5949 105 irq_n = EXTI2_IRQn;
mbed_official 60:142c6c6f5949 106 vector = (uint32_t)&gpio_irq2;
mbed_official 60:142c6c6f5949 107 break;
mbed_official 60:142c6c6f5949 108 case 3:
mbed_official 60:142c6c6f5949 109 irq_n = EXTI3_IRQn;
mbed_official 60:142c6c6f5949 110 vector = (uint32_t)&gpio_irq3;
mbed_official 60:142c6c6f5949 111 break;
mbed_official 60:142c6c6f5949 112 case 4:
mbed_official 60:142c6c6f5949 113 irq_n = EXTI4_IRQn;
mbed_official 60:142c6c6f5949 114 vector = (uint32_t)&gpio_irq4;
mbed_official 60:142c6c6f5949 115 break;
mbed_official 60:142c6c6f5949 116 case 5:
mbed_official 60:142c6c6f5949 117 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 118 vector = (uint32_t)&gpio_irq5;
mbed_official 60:142c6c6f5949 119 break;
mbed_official 60:142c6c6f5949 120 case 6:
mbed_official 60:142c6c6f5949 121 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 122 vector = (uint32_t)&gpio_irq6;
mbed_official 60:142c6c6f5949 123 break;
mbed_official 60:142c6c6f5949 124 case 7:
mbed_official 60:142c6c6f5949 125 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 126 vector = (uint32_t)&gpio_irq7;
mbed_official 60:142c6c6f5949 127 break;
mbed_official 60:142c6c6f5949 128 case 8:
mbed_official 60:142c6c6f5949 129 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 130 vector = (uint32_t)&gpio_irq8;
mbed_official 60:142c6c6f5949 131 break;
mbed_official 60:142c6c6f5949 132 case 9:
mbed_official 60:142c6c6f5949 133 irq_n = EXTI9_5_IRQn;
mbed_official 60:142c6c6f5949 134 vector = (uint32_t)&gpio_irq9;
mbed_official 60:142c6c6f5949 135 break;
mbed_official 60:142c6c6f5949 136 case 10:
mbed_official 60:142c6c6f5949 137 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 138 vector = (uint32_t)&gpio_irq10;
mbed_official 60:142c6c6f5949 139 break;
mbed_official 60:142c6c6f5949 140 case 11:
mbed_official 60:142c6c6f5949 141 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 142 vector = (uint32_t)&gpio_irq11;
mbed_official 60:142c6c6f5949 143 break;
mbed_official 60:142c6c6f5949 144 case 12:
mbed_official 60:142c6c6f5949 145 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 146 vector = (uint32_t)&gpio_irq12;
mbed_official 60:142c6c6f5949 147 break;
mbed_official 60:142c6c6f5949 148 case 13:
mbed_official 60:142c6c6f5949 149 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 150 vector = (uint32_t)&gpio_irq13;
mbed_official 60:142c6c6f5949 151 break;
mbed_official 60:142c6c6f5949 152 case 14:
mbed_official 60:142c6c6f5949 153 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 154 vector = (uint32_t)&gpio_irq14;
mbed_official 60:142c6c6f5949 155 break;
mbed_official 60:142c6c6f5949 156 case 15:
mbed_official 60:142c6c6f5949 157 irq_n = EXTI15_10_IRQn;
mbed_official 60:142c6c6f5949 158 vector = (uint32_t)&gpio_irq15;
mbed_official 60:142c6c6f5949 159 break;
mbed_official 60:142c6c6f5949 160 default:
mbed_official 60:142c6c6f5949 161 return -1;
mbed_official 60:142c6c6f5949 162 }
mbed_official 60:142c6c6f5949 163
mbed_official 60:142c6c6f5949 164 // Enable GPIO and AFIO clocks
mbed_official 60:142c6c6f5949 165 RCC_APB2PeriphClockCmd((uint32_t)(RCC_APB2Periph_GPIOA << port_index), ENABLE);
mbed_official 60:142c6c6f5949 166 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
mbed_official 60:142c6c6f5949 167
mbed_official 60:142c6c6f5949 168 // Connect EXTI line to pin
mbed_official 60:142c6c6f5949 169 GPIO_EXTILineConfig(port_index, pin_index);
mbed_official 60:142c6c6f5949 170
mbed_official 60:142c6c6f5949 171 // Configure EXTI line
mbed_official 60:142c6c6f5949 172 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 173 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 60:142c6c6f5949 174 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 175 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 176 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 177 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 178
mbed_official 60:142c6c6f5949 179 // Enable and set EXTI interrupt to the lowest priority
mbed_official 60:142c6c6f5949 180 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 60:142c6c6f5949 181 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 60:142c6c6f5949 182 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 60:142c6c6f5949 183 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 60:142c6c6f5949 184 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 60:142c6c6f5949 185 NVIC_Init(&NVIC_InitStructure);
mbed_official 60:142c6c6f5949 186
mbed_official 60:142c6c6f5949 187 NVIC_SetVector(irq_n, vector);
mbed_official 60:142c6c6f5949 188 NVIC_EnableIRQ(irq_n);
mbed_official 60:142c6c6f5949 189
mbed_official 60:142c6c6f5949 190 // Save for future use
mbed_official 60:142c6c6f5949 191 obj->ch = pin_index;
mbed_official 60:142c6c6f5949 192 obj->irq_n = irq_n;
mbed_official 60:142c6c6f5949 193 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 194
mbed_official 60:142c6c6f5949 195 channel_ids[obj->ch] = id;
mbed_official 60:142c6c6f5949 196
mbed_official 60:142c6c6f5949 197 irq_handler = handler;
mbed_official 60:142c6c6f5949 198
mbed_official 60:142c6c6f5949 199 return 0;
mbed_official 60:142c6c6f5949 200 }
mbed_official 60:142c6c6f5949 201
mbed_official 60:142c6c6f5949 202 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 203 channel_ids[obj->ch] = 0;
mbed_official 60:142c6c6f5949 204 // Disable EXTI line
mbed_official 60:142c6c6f5949 205 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 206 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 207 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 208 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 209 }
mbed_official 60:142c6c6f5949 210
mbed_official 60:142c6c6f5949 211 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 60:142c6c6f5949 212 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 60:142c6c6f5949 213
mbed_official 60:142c6c6f5949 214 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << obj->ch);
mbed_official 60:142c6c6f5949 215 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 60:142c6c6f5949 216
mbed_official 60:142c6c6f5949 217 if (event == IRQ_RISE) {
mbed_official 60:142c6c6f5949 218 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 60:142c6c6f5949 219 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 60:142c6c6f5949 220 obj->event = EDGE_BOTH;
mbed_official 60:142c6c6f5949 221 }
mbed_official 60:142c6c6f5949 222 else { // NONE or RISE
mbed_official 60:142c6c6f5949 223 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 60:142c6c6f5949 224 obj->event = EDGE_RISE;
mbed_official 60:142c6c6f5949 225 }
mbed_official 60:142c6c6f5949 226 }
mbed_official 60:142c6c6f5949 227
mbed_official 60:142c6c6f5949 228 if (event == IRQ_FALL) {
mbed_official 60:142c6c6f5949 229 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 60:142c6c6f5949 230 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 60:142c6c6f5949 231 obj->event = EDGE_BOTH;
mbed_official 60:142c6c6f5949 232 }
mbed_official 60:142c6c6f5949 233 else { // NONE or FALL
mbed_official 60:142c6c6f5949 234 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 60:142c6c6f5949 235 obj->event = EDGE_FALL;
mbed_official 60:142c6c6f5949 236 }
mbed_official 60:142c6c6f5949 237 }
mbed_official 60:142c6c6f5949 238
mbed_official 60:142c6c6f5949 239 if (enable) {
mbed_official 60:142c6c6f5949 240 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 60:142c6c6f5949 241 }
mbed_official 60:142c6c6f5949 242 else {
mbed_official 60:142c6c6f5949 243 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 60:142c6c6f5949 244 }
mbed_official 60:142c6c6f5949 245
mbed_official 60:142c6c6f5949 246 EXTI_Init(&EXTI_InitStructure);
mbed_official 60:142c6c6f5949 247 }
mbed_official 60:142c6c6f5949 248
mbed_official 60:142c6c6f5949 249 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 250 NVIC_EnableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 251 }
mbed_official 60:142c6c6f5949 252
mbed_official 60:142c6c6f5949 253 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 60:142c6c6f5949 254 NVIC_DisableIRQ(obj->irq_n);
mbed_official 60:142c6c6f5949 255 obj->event = EDGE_NONE;
mbed_official 60:142c6c6f5949 256 }