gabriel della-monica / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/gpio_irq_api.c@235:685d5f11838f, 2014-06-23 (annotated)

Committer:
mbed_official
Date:
Mon Jun 23 14:00:09 2014 +0100
Revision:
235:685d5f11838f
Child:
250:a49055e7a707
Synchronized with git revision 9728c76667962b289ee9c4c687ef9f115db48cd3



Full URL: https://github.com/mbedmicro/mbed/commit/9728c76667962b289ee9c4c687ef9f115db48cd3/



[NUCLEO_F411RE] Add all target files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 235:685d5f11838f 1 /* mbed Microcontroller Library
mbed_official 235:685d5f11838f 2 *******************************************************************************
mbed_official 235:685d5f11838f 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 235:685d5f11838f 4 * All rights reserved.
mbed_official 235:685d5f11838f 5 *
mbed_official 235:685d5f11838f 6 * Redistribution and use in source and binary forms, with or without
mbed_official 235:685d5f11838f 7 * modification, are permitted provided that the following conditions are met:
mbed_official 235:685d5f11838f 8 *
mbed_official 235:685d5f11838f 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 235:685d5f11838f 10 * this list of conditions and the following disclaimer.
mbed_official 235:685d5f11838f 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 235:685d5f11838f 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 235:685d5f11838f 13 * and/or other materials provided with the distribution.
mbed_official 235:685d5f11838f 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 235:685d5f11838f 15 * may be used to endorse or promote products derived from this software
mbed_official 235:685d5f11838f 16 * without specific prior written permission.
mbed_official 235:685d5f11838f 17 *
mbed_official 235:685d5f11838f 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 235:685d5f11838f 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 235:685d5f11838f 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 235:685d5f11838f 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 235:685d5f11838f 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 235:685d5f11838f 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 235:685d5f11838f 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 235:685d5f11838f 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 235:685d5f11838f 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 235:685d5f11838f 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 235:685d5f11838f 28 *******************************************************************************
mbed_official 235:685d5f11838f 29 */
mbed_official 235:685d5f11838f 30 #include <stddef.h>
mbed_official 235:685d5f11838f 31 #include "cmsis.h"
mbed_official 235:685d5f11838f 32 #include "gpio_irq_api.h"
mbed_official 235:685d5f11838f 33 #include "pinmap.h"
mbed_official 235:685d5f11838f 34 #include "error.h"
mbed_official 235:685d5f11838f 35
mbed_official 235:685d5f11838f 36 #define EDGE_NONE (0)
mbed_official 235:685d5f11838f 37 #define EDGE_RISE (1)
mbed_official 235:685d5f11838f 38 #define EDGE_FALL (2)
mbed_official 235:685d5f11838f 39 #define EDGE_BOTH (3)
mbed_official 235:685d5f11838f 40
mbed_official 235:685d5f11838f 41 #define CHANNEL_NUM (7)
mbed_official 235:685d5f11838f 42
mbed_official 235:685d5f11838f 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 235:685d5f11838f 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 235:685d5f11838f 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 235:685d5f11838f 46
mbed_official 235:685d5f11838f 47 static gpio_irq_handler irq_handler;
mbed_official 235:685d5f11838f 48
mbed_official 235:685d5f11838f 49 static void handle_interrupt_in(uint32_t irq_index)
mbed_official 235:685d5f11838f 50 {
mbed_official 235:685d5f11838f 51 // Retrieve the gpio and pin that generate the irq
mbed_official 235:685d5f11838f 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 235:685d5f11838f 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 235:685d5f11838f 54
mbed_official 235:685d5f11838f 55 // Clear interrupt flag
mbed_official 235:685d5f11838f 56 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 235:685d5f11838f 57 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 235:685d5f11838f 58 }
mbed_official 235:685d5f11838f 59
mbed_official 235:685d5f11838f 60 if (channel_ids[irq_index] == 0) return;
mbed_official 235:685d5f11838f 61
mbed_official 235:685d5f11838f 62 // Check which edge has generated the irq
mbed_official 235:685d5f11838f 63 if ((gpio->IDR & pin) == 0) {
mbed_official 235:685d5f11838f 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 235:685d5f11838f 65 } else {
mbed_official 235:685d5f11838f 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 235:685d5f11838f 67 }
mbed_official 235:685d5f11838f 68 }
mbed_official 235:685d5f11838f 69
mbed_official 235:685d5f11838f 70 // The irq_index is passed to the function
mbed_official 235:685d5f11838f 71 // EXTI line 0
mbed_official 235:685d5f11838f 72 static void gpio_irq0(void)
mbed_official 235:685d5f11838f 73 {
mbed_official 235:685d5f11838f 74 handle_interrupt_in(0);
mbed_official 235:685d5f11838f 75 }
mbed_official 235:685d5f11838f 76 // EXTI line 1
mbed_official 235:685d5f11838f 77 static void gpio_irq1(void)
mbed_official 235:685d5f11838f 78 {
mbed_official 235:685d5f11838f 79 handle_interrupt_in(1);
mbed_official 235:685d5f11838f 80 }
mbed_official 235:685d5f11838f 81 // EXTI line 2
mbed_official 235:685d5f11838f 82 static void gpio_irq2(void)
mbed_official 235:685d5f11838f 83 {
mbed_official 235:685d5f11838f 84 handle_interrupt_in(2);
mbed_official 235:685d5f11838f 85 }
mbed_official 235:685d5f11838f 86 // EXTI line 3
mbed_official 235:685d5f11838f 87 static void gpio_irq3(void)
mbed_official 235:685d5f11838f 88 {
mbed_official 235:685d5f11838f 89 handle_interrupt_in(3);
mbed_official 235:685d5f11838f 90 }
mbed_official 235:685d5f11838f 91 // EXTI line 4
mbed_official 235:685d5f11838f 92 static void gpio_irq4(void)
mbed_official 235:685d5f11838f 93 {
mbed_official 235:685d5f11838f 94 handle_interrupt_in(4);
mbed_official 235:685d5f11838f 95 }
mbed_official 235:685d5f11838f 96 // EXTI lines 5 to 9
mbed_official 235:685d5f11838f 97 static void gpio_irq5(void)
mbed_official 235:685d5f11838f 98 {
mbed_official 235:685d5f11838f 99 handle_interrupt_in(5);
mbed_official 235:685d5f11838f 100 }
mbed_official 235:685d5f11838f 101 // EXTI lines 10 to 15
mbed_official 235:685d5f11838f 102 static void gpio_irq6(void)
mbed_official 235:685d5f11838f 103 {
mbed_official 235:685d5f11838f 104 handle_interrupt_in(6);
mbed_official 235:685d5f11838f 105 }
mbed_official 235:685d5f11838f 106
mbed_official 235:685d5f11838f 107 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 235:685d5f11838f 108
mbed_official 235:685d5f11838f 109 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 235:685d5f11838f 110 {
mbed_official 235:685d5f11838f 111 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 235:685d5f11838f 112 uint32_t vector = 0;
mbed_official 235:685d5f11838f 113 uint32_t irq_index;
mbed_official 235:685d5f11838f 114
mbed_official 235:685d5f11838f 115 if (pin == NC) return -1;
mbed_official 235:685d5f11838f 116
mbed_official 235:685d5f11838f 117 uint32_t port_index = STM_PORT(pin);
mbed_official 235:685d5f11838f 118 uint32_t pin_index = STM_PIN(pin);
mbed_official 235:685d5f11838f 119
mbed_official 235:685d5f11838f 120 // Select irq number and interrupt routine
mbed_official 235:685d5f11838f 121 switch (pin_index) {
mbed_official 235:685d5f11838f 122 case 0:
mbed_official 235:685d5f11838f 123 irq_n = EXTI0_IRQn;
mbed_official 235:685d5f11838f 124 vector = (uint32_t)&gpio_irq0;
mbed_official 235:685d5f11838f 125 irq_index = 0;
mbed_official 235:685d5f11838f 126 break;
mbed_official 235:685d5f11838f 127 case 1:
mbed_official 235:685d5f11838f 128 irq_n = EXTI1_IRQn;
mbed_official 235:685d5f11838f 129 vector = (uint32_t)&gpio_irq1;
mbed_official 235:685d5f11838f 130 irq_index = 1;
mbed_official 235:685d5f11838f 131 break;
mbed_official 235:685d5f11838f 132 case 2:
mbed_official 235:685d5f11838f 133 irq_n = EXTI2_IRQn;
mbed_official 235:685d5f11838f 134 vector = (uint32_t)&gpio_irq2;
mbed_official 235:685d5f11838f 135 irq_index = 2;
mbed_official 235:685d5f11838f 136 break;
mbed_official 235:685d5f11838f 137 case 3:
mbed_official 235:685d5f11838f 138 irq_n = EXTI3_IRQn;
mbed_official 235:685d5f11838f 139 vector = (uint32_t)&gpio_irq3;
mbed_official 235:685d5f11838f 140 irq_index = 3;
mbed_official 235:685d5f11838f 141 break;
mbed_official 235:685d5f11838f 142 case 4:
mbed_official 235:685d5f11838f 143 irq_n = EXTI4_IRQn;
mbed_official 235:685d5f11838f 144 vector = (uint32_t)&gpio_irq4;
mbed_official 235:685d5f11838f 145 irq_index = 4;
mbed_official 235:685d5f11838f 146 break;
mbed_official 235:685d5f11838f 147 case 5:
mbed_official 235:685d5f11838f 148 case 6:
mbed_official 235:685d5f11838f 149 case 7:
mbed_official 235:685d5f11838f 150 case 8:
mbed_official 235:685d5f11838f 151 case 9:
mbed_official 235:685d5f11838f 152 irq_n = EXTI9_5_IRQn;
mbed_official 235:685d5f11838f 153 vector = (uint32_t)&gpio_irq5;
mbed_official 235:685d5f11838f 154 irq_index = 5;
mbed_official 235:685d5f11838f 155 break;
mbed_official 235:685d5f11838f 156 case 10:
mbed_official 235:685d5f11838f 157 case 11:
mbed_official 235:685d5f11838f 158 case 12:
mbed_official 235:685d5f11838f 159 case 13:
mbed_official 235:685d5f11838f 160 case 14:
mbed_official 235:685d5f11838f 161 case 15:
mbed_official 235:685d5f11838f 162 irq_n = EXTI15_10_IRQn;
mbed_official 235:685d5f11838f 163 vector = (uint32_t)&gpio_irq6;
mbed_official 235:685d5f11838f 164 irq_index = 6;
mbed_official 235:685d5f11838f 165 break;
mbed_official 235:685d5f11838f 166 default:
mbed_official 235:685d5f11838f 167 error("InterruptIn error: pin not supported.\n");
mbed_official 235:685d5f11838f 168 return -1;
mbed_official 235:685d5f11838f 169 }
mbed_official 235:685d5f11838f 170
mbed_official 235:685d5f11838f 171 // Enable GPIO clock
mbed_official 235:685d5f11838f 172 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 235:685d5f11838f 173
mbed_official 235:685d5f11838f 174 // Configure GPIO
mbed_official 235:685d5f11838f 175 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 235:685d5f11838f 176
mbed_official 235:685d5f11838f 177 // Enable EXTI interrupt
mbed_official 235:685d5f11838f 178 NVIC_SetVector(irq_n, vector);
mbed_official 235:685d5f11838f 179 NVIC_EnableIRQ(irq_n);
mbed_official 235:685d5f11838f 180
mbed_official 235:685d5f11838f 181 // Save informations for future use
mbed_official 235:685d5f11838f 182 obj->irq_n = irq_n;
mbed_official 235:685d5f11838f 183 obj->irq_index = irq_index;
mbed_official 235:685d5f11838f 184 obj->event = EDGE_NONE;
mbed_official 235:685d5f11838f 185 obj->pin = pin;
mbed_official 235:685d5f11838f 186 channel_ids[irq_index] = id;
mbed_official 235:685d5f11838f 187 channel_gpio[irq_index] = gpio_add;
mbed_official 235:685d5f11838f 188 channel_pin[irq_index] = pin_index;
mbed_official 235:685d5f11838f 189
mbed_official 235:685d5f11838f 190 irq_handler = handler;
mbed_official 235:685d5f11838f 191
mbed_official 235:685d5f11838f 192 return 0;
mbed_official 235:685d5f11838f 193 }
mbed_official 235:685d5f11838f 194
mbed_official 235:685d5f11838f 195 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 235:685d5f11838f 196 {
mbed_official 235:685d5f11838f 197 channel_ids[obj->irq_index] = 0;
mbed_official 235:685d5f11838f 198 channel_gpio[obj->irq_index] = 0;
mbed_official 235:685d5f11838f 199 channel_pin[obj->irq_index] = 0;
mbed_official 235:685d5f11838f 200 // Disable EXTI line
mbed_official 235:685d5f11838f 201 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 235:685d5f11838f 202 obj->event = EDGE_NONE;
mbed_official 235:685d5f11838f 203 }
mbed_official 235:685d5f11838f 204
mbed_official 235:685d5f11838f 205 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 235:685d5f11838f 206 {
mbed_official 235:685d5f11838f 207 uint32_t mode = STM_MODE_INPUT;
mbed_official 235:685d5f11838f 208 uint32_t pull = GPIO_NOPULL;
mbed_official 235:685d5f11838f 209
mbed_official 235:685d5f11838f 210 if (enable) {
mbed_official 235:685d5f11838f 211
mbed_official 235:685d5f11838f 212 pull = GPIO_NOPULL;
mbed_official 235:685d5f11838f 213
mbed_official 235:685d5f11838f 214 if (event == IRQ_RISE) {
mbed_official 235:685d5f11838f 215 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 235:685d5f11838f 216 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 235:685d5f11838f 217 obj->event = EDGE_BOTH;
mbed_official 235:685d5f11838f 218 } else { // NONE or RISE
mbed_official 235:685d5f11838f 219 mode = STM_MODE_IT_RISING;
mbed_official 235:685d5f11838f 220 obj->event = EDGE_RISE;
mbed_official 235:685d5f11838f 221 }
mbed_official 235:685d5f11838f 222 }
mbed_official 235:685d5f11838f 223
mbed_official 235:685d5f11838f 224 if (event == IRQ_FALL) {
mbed_official 235:685d5f11838f 225 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 235:685d5f11838f 226 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 235:685d5f11838f 227 obj->event = EDGE_BOTH;
mbed_official 235:685d5f11838f 228 } else { // NONE or FALL
mbed_official 235:685d5f11838f 229 mode = STM_MODE_IT_FALLING;
mbed_official 235:685d5f11838f 230 obj->event = EDGE_FALL;
mbed_official 235:685d5f11838f 231 }
mbed_official 235:685d5f11838f 232 }
mbed_official 235:685d5f11838f 233 } else {
mbed_official 235:685d5f11838f 234 mode = STM_MODE_INPUT;
mbed_official 235:685d5f11838f 235 pull = GPIO_NOPULL;
mbed_official 235:685d5f11838f 236 obj->event = EDGE_NONE;
mbed_official 235:685d5f11838f 237 }
mbed_official 235:685d5f11838f 238
mbed_official 235:685d5f11838f 239 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 235:685d5f11838f 240 }
mbed_official 235:685d5f11838f 241
mbed_official 235:685d5f11838f 242 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 235:685d5f11838f 243 {
mbed_official 235:685d5f11838f 244 NVIC_EnableIRQ(obj->irq_n);
mbed_official 235:685d5f11838f 245 }
mbed_official 235:685d5f11838f 246
mbed_official 235:685d5f11838f 247 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 235:685d5f11838f 248 {
mbed_official 235:685d5f11838f 249 NVIC_DisableIRQ(obj->irq_n);
mbed_official 235:685d5f11838f 250 obj->event = EDGE_NONE;
mbed_official 235:685d5f11838f 251 }