test / mbed_in_china

来自中国的硬件平台

Dependents:   mbed_in_china_blink_led

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F407VG/gpio_irq_api.c@133:d4dda5c437f0, 2014-03-24 (annotated)

Committer:
mbed_official
Date:
Mon Mar 24 17:45:07 2014 +0000
Revision:
133:d4dda5c437f0
Synchronized with git revision 47b961246bed973fe4cb8932781ffc8025b78a61



Full URL: https://github.com/mbedmicro/mbed/commit/47b961246bed973fe4cb8932781ffc8025b78a61/



[STM32F4-Discovery (STM32F407VG)] initial port

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 133:d4dda5c437f0 1 /* mbed Microcontroller Library
mbed_official 133:d4dda5c437f0 2 *******************************************************************************
mbed_official 133:d4dda5c437f0 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 133:d4dda5c437f0 4 * All rights reserved.
mbed_official 133:d4dda5c437f0 5 *
mbed_official 133:d4dda5c437f0 6 * Redistribution and use in source and binary forms, with or without
mbed_official 133:d4dda5c437f0 7 * modification, are permitted provided that the following conditions are met:
mbed_official 133:d4dda5c437f0 8 *
mbed_official 133:d4dda5c437f0 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 133:d4dda5c437f0 10 * this list of conditions and the following disclaimer.
mbed_official 133:d4dda5c437f0 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 133:d4dda5c437f0 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 133:d4dda5c437f0 13 * and/or other materials provided with the distribution.
mbed_official 133:d4dda5c437f0 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 133:d4dda5c437f0 15 * may be used to endorse or promote products derived from this software
mbed_official 133:d4dda5c437f0 16 * without specific prior written permission.
mbed_official 133:d4dda5c437f0 17 *
mbed_official 133:d4dda5c437f0 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 133:d4dda5c437f0 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 133:d4dda5c437f0 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 133:d4dda5c437f0 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 133:d4dda5c437f0 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 133:d4dda5c437f0 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 133:d4dda5c437f0 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 133:d4dda5c437f0 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 133:d4dda5c437f0 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 133:d4dda5c437f0 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 133:d4dda5c437f0 28 *******************************************************************************
mbed_official 133:d4dda5c437f0 29 */
mbed_official 133:d4dda5c437f0 30 #include <stddef.h>
mbed_official 133:d4dda5c437f0 31 #include "cmsis.h"
mbed_official 133:d4dda5c437f0 32
mbed_official 133:d4dda5c437f0 33 #include "gpio_irq_api.h"
mbed_official 133:d4dda5c437f0 34 #include "pinmap.h"
mbed_official 133:d4dda5c437f0 35 #include "stm32f4xx_hal.h"
mbed_official 133:d4dda5c437f0 36 #include "error.h"
mbed_official 133:d4dda5c437f0 37
mbed_official 133:d4dda5c437f0 38 #define EDGE_NONE (0)
mbed_official 133:d4dda5c437f0 39 #define EDGE_RISE (1)
mbed_official 133:d4dda5c437f0 40 #define EDGE_FALL (2)
mbed_official 133:d4dda5c437f0 41 #define EDGE_BOTH (3)
mbed_official 133:d4dda5c437f0 42
mbed_official 133:d4dda5c437f0 43 #define CHANNEL_NUM (7)
mbed_official 133:d4dda5c437f0 44
mbed_official 133:d4dda5c437f0 45 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 133:d4dda5c437f0 46 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 133:d4dda5c437f0 47 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 133:d4dda5c437f0 48
mbed_official 133:d4dda5c437f0 49 static gpio_irq_handler irq_handler;
mbed_official 133:d4dda5c437f0 50
mbed_official 133:d4dda5c437f0 51 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 133:d4dda5c437f0 52 // Retrieve the gpio and pin that generate the irq
mbed_official 133:d4dda5c437f0 53 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 133:d4dda5c437f0 54 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 133:d4dda5c437f0 55
mbed_official 133:d4dda5c437f0 56 // Clear interrupt flag
mbed_official 133:d4dda5c437f0 57 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET)
mbed_official 133:d4dda5c437f0 58 {
mbed_official 133:d4dda5c437f0 59 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 133:d4dda5c437f0 60 }
mbed_official 133:d4dda5c437f0 61
mbed_official 133:d4dda5c437f0 62 if (channel_ids[irq_index] == 0) return;
mbed_official 133:d4dda5c437f0 63
mbed_official 133:d4dda5c437f0 64 // Check which edge has generated the irq
mbed_official 133:d4dda5c437f0 65 if ((gpio->IDR & pin) == 0) {
mbed_official 133:d4dda5c437f0 66 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 133:d4dda5c437f0 67 }
mbed_official 133:d4dda5c437f0 68 else {
mbed_official 133:d4dda5c437f0 69 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 133:d4dda5c437f0 70 }
mbed_official 133:d4dda5c437f0 71 }
mbed_official 133:d4dda5c437f0 72
mbed_official 133:d4dda5c437f0 73 // The irq_index is passed to the function
mbed_official 133:d4dda5c437f0 74 static void gpio_irq0(void) {handle_interrupt_in(0);} // EXTI line 0
mbed_official 133:d4dda5c437f0 75 static void gpio_irq1(void) {handle_interrupt_in(1);} // EXTI line 1
mbed_official 133:d4dda5c437f0 76 static void gpio_irq2(void) {handle_interrupt_in(2);} // EXTI line 2
mbed_official 133:d4dda5c437f0 77 static void gpio_irq3(void) {handle_interrupt_in(3);} // EXTI line 3
mbed_official 133:d4dda5c437f0 78 static void gpio_irq4(void) {handle_interrupt_in(4);} // EXTI line 4
mbed_official 133:d4dda5c437f0 79 static void gpio_irq5(void) {handle_interrupt_in(5);} // EXTI lines 5 to 9
mbed_official 133:d4dda5c437f0 80 static void gpio_irq6(void) {handle_interrupt_in(6);} // EXTI lines 10 to 15
mbed_official 133:d4dda5c437f0 81
mbed_official 133:d4dda5c437f0 82 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 133:d4dda5c437f0 83
mbed_official 133:d4dda5c437f0 84 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 133:d4dda5c437f0 85 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 133:d4dda5c437f0 86 uint32_t vector = 0;
mbed_official 133:d4dda5c437f0 87 uint32_t irq_index;
mbed_official 133:d4dda5c437f0 88
mbed_official 133:d4dda5c437f0 89 if (pin == NC) return -1;
mbed_official 133:d4dda5c437f0 90
mbed_official 133:d4dda5c437f0 91 uint32_t port_index = STM_PORT(pin);
mbed_official 133:d4dda5c437f0 92 uint32_t pin_index = STM_PIN(pin);
mbed_official 133:d4dda5c437f0 93
mbed_official 133:d4dda5c437f0 94 // Select irq number and interrupt routine
mbed_official 133:d4dda5c437f0 95 switch (pin_index) {
mbed_official 133:d4dda5c437f0 96 case 0:
mbed_official 133:d4dda5c437f0 97 irq_n = EXTI0_IRQn;
mbed_official 133:d4dda5c437f0 98 vector = (uint32_t)&gpio_irq0;
mbed_official 133:d4dda5c437f0 99 irq_index = 0;
mbed_official 133:d4dda5c437f0 100 break;
mbed_official 133:d4dda5c437f0 101 case 1:
mbed_official 133:d4dda5c437f0 102 irq_n = EXTI1_IRQn;
mbed_official 133:d4dda5c437f0 103 vector = (uint32_t)&gpio_irq1;
mbed_official 133:d4dda5c437f0 104 irq_index = 1;
mbed_official 133:d4dda5c437f0 105 break;
mbed_official 133:d4dda5c437f0 106 case 2:
mbed_official 133:d4dda5c437f0 107 irq_n = EXTI2_IRQn;
mbed_official 133:d4dda5c437f0 108 vector = (uint32_t)&gpio_irq2;
mbed_official 133:d4dda5c437f0 109 irq_index = 2;
mbed_official 133:d4dda5c437f0 110 break;
mbed_official 133:d4dda5c437f0 111 case 3:
mbed_official 133:d4dda5c437f0 112 irq_n = EXTI3_IRQn;
mbed_official 133:d4dda5c437f0 113 vector = (uint32_t)&gpio_irq3;
mbed_official 133:d4dda5c437f0 114 irq_index = 3;
mbed_official 133:d4dda5c437f0 115 break;
mbed_official 133:d4dda5c437f0 116 case 4:
mbed_official 133:d4dda5c437f0 117 irq_n = EXTI4_IRQn;
mbed_official 133:d4dda5c437f0 118 vector = (uint32_t)&gpio_irq4;
mbed_official 133:d4dda5c437f0 119 irq_index = 4;
mbed_official 133:d4dda5c437f0 120 break;
mbed_official 133:d4dda5c437f0 121 case 5:
mbed_official 133:d4dda5c437f0 122 case 6:
mbed_official 133:d4dda5c437f0 123 case 7:
mbed_official 133:d4dda5c437f0 124 case 8:
mbed_official 133:d4dda5c437f0 125 case 9:
mbed_official 133:d4dda5c437f0 126 irq_n = EXTI9_5_IRQn;
mbed_official 133:d4dda5c437f0 127 vector = (uint32_t)&gpio_irq5;
mbed_official 133:d4dda5c437f0 128 irq_index = 5;
mbed_official 133:d4dda5c437f0 129 break;
mbed_official 133:d4dda5c437f0 130 case 10:
mbed_official 133:d4dda5c437f0 131 case 11:
mbed_official 133:d4dda5c437f0 132 case 12:
mbed_official 133:d4dda5c437f0 133 case 13:
mbed_official 133:d4dda5c437f0 134 case 14:
mbed_official 133:d4dda5c437f0 135 case 15:
mbed_official 133:d4dda5c437f0 136 irq_n = EXTI15_10_IRQn;
mbed_official 133:d4dda5c437f0 137 vector = (uint32_t)&gpio_irq6;
mbed_official 133:d4dda5c437f0 138 irq_index = 6;
mbed_official 133:d4dda5c437f0 139 break;
mbed_official 133:d4dda5c437f0 140 default:
mbed_official 133:d4dda5c437f0 141 error("InterruptIn error: pin not supported.\n");
mbed_official 133:d4dda5c437f0 142 return -1;
mbed_official 133:d4dda5c437f0 143 }
mbed_official 133:d4dda5c437f0 144
mbed_official 133:d4dda5c437f0 145 // Enable GPIO clock
mbed_official 133:d4dda5c437f0 146 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 133:d4dda5c437f0 147
mbed_official 133:d4dda5c437f0 148 // Configure GPIO
mbed_official 133:d4dda5c437f0 149 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 133:d4dda5c437f0 150
mbed_official 133:d4dda5c437f0 151 // Enable EXTI interrupt
mbed_official 133:d4dda5c437f0 152 NVIC_SetVector(irq_n, vector);
mbed_official 133:d4dda5c437f0 153 NVIC_EnableIRQ(irq_n);
mbed_official 133:d4dda5c437f0 154
mbed_official 133:d4dda5c437f0 155 // Save informations for future use
mbed_official 133:d4dda5c437f0 156 obj->irq_n = irq_n;
mbed_official 133:d4dda5c437f0 157 obj->irq_index = irq_index;
mbed_official 133:d4dda5c437f0 158 obj->event = EDGE_NONE;
mbed_official 133:d4dda5c437f0 159 obj->pin = pin;
mbed_official 133:d4dda5c437f0 160 channel_ids[irq_index] = id;
mbed_official 133:d4dda5c437f0 161 channel_gpio[irq_index] = gpio_add;
mbed_official 133:d4dda5c437f0 162 channel_pin[irq_index] = pin_index;
mbed_official 133:d4dda5c437f0 163
mbed_official 133:d4dda5c437f0 164 irq_handler = handler;
mbed_official 133:d4dda5c437f0 165
mbed_official 133:d4dda5c437f0 166 return 0;
mbed_official 133:d4dda5c437f0 167 }
mbed_official 133:d4dda5c437f0 168
mbed_official 133:d4dda5c437f0 169 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 133:d4dda5c437f0 170 channel_ids[obj->irq_index] = 0;
mbed_official 133:d4dda5c437f0 171 channel_gpio[obj->irq_index] = 0;
mbed_official 133:d4dda5c437f0 172 channel_pin[obj->irq_index] = 0;
mbed_official 133:d4dda5c437f0 173 // Disable EXTI line
mbed_official 133:d4dda5c437f0 174 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 133:d4dda5c437f0 175 obj->event = EDGE_NONE;
mbed_official 133:d4dda5c437f0 176 }
mbed_official 133:d4dda5c437f0 177
mbed_official 133:d4dda5c437f0 178 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 133:d4dda5c437f0 179 uint32_t mode = STM_MODE_INPUT;
mbed_official 133:d4dda5c437f0 180 uint32_t pull = GPIO_NOPULL;
mbed_official 133:d4dda5c437f0 181
mbed_official 133:d4dda5c437f0 182 if (enable) {
mbed_official 133:d4dda5c437f0 183
mbed_official 133:d4dda5c437f0 184 pull = GPIO_NOPULL;
mbed_official 133:d4dda5c437f0 185
mbed_official 133:d4dda5c437f0 186 if (event == IRQ_RISE) {
mbed_official 133:d4dda5c437f0 187 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 133:d4dda5c437f0 188 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 133:d4dda5c437f0 189 obj->event = EDGE_BOTH;
mbed_official 133:d4dda5c437f0 190 }
mbed_official 133:d4dda5c437f0 191 else { // NONE or RISE
mbed_official 133:d4dda5c437f0 192 mode = STM_MODE_IT_RISING;
mbed_official 133:d4dda5c437f0 193 obj->event = EDGE_RISE;
mbed_official 133:d4dda5c437f0 194 }
mbed_official 133:d4dda5c437f0 195 }
mbed_official 133:d4dda5c437f0 196
mbed_official 133:d4dda5c437f0 197 if (event == IRQ_FALL) {
mbed_official 133:d4dda5c437f0 198 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 133:d4dda5c437f0 199 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 133:d4dda5c437f0 200 obj->event = EDGE_BOTH;
mbed_official 133:d4dda5c437f0 201 }
mbed_official 133:d4dda5c437f0 202 else { // NONE or FALL
mbed_official 133:d4dda5c437f0 203 mode = STM_MODE_IT_FALLING;
mbed_official 133:d4dda5c437f0 204 obj->event = EDGE_FALL;
mbed_official 133:d4dda5c437f0 205 }
mbed_official 133:d4dda5c437f0 206 }
mbed_official 133:d4dda5c437f0 207 }
mbed_official 133:d4dda5c437f0 208 else {
mbed_official 133:d4dda5c437f0 209 mode = STM_MODE_INPUT;
mbed_official 133:d4dda5c437f0 210 pull = GPIO_NOPULL;
mbed_official 133:d4dda5c437f0 211 obj->event = EDGE_NONE;
mbed_official 133:d4dda5c437f0 212 }
mbed_official 133:d4dda5c437f0 213
mbed_official 133:d4dda5c437f0 214 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 133:d4dda5c437f0 215 }
mbed_official 133:d4dda5c437f0 216
mbed_official 133:d4dda5c437f0 217 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 133:d4dda5c437f0 218 NVIC_EnableIRQ(obj->irq_n);
mbed_official 133:d4dda5c437f0 219 }
mbed_official 133:d4dda5c437f0 220
mbed_official 133:d4dda5c437f0 221 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 133:d4dda5c437f0 222 NVIC_DisableIRQ(obj->irq_n);
mbed_official 133:d4dda5c437f0 223 obj->event = EDGE_NONE;
mbed_official 133:d4dda5c437f0 224 }