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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F401RE/gpio_irq_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
251:de9a1e4ffd79
Child:
285:31249416b6f9
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /* mbed Microcontroller Library
mbed_official 87:085cde657901 2 *******************************************************************************
mbed_official 87:085cde657901 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 87:085cde657901 4 * All rights reserved.
mbed_official 87:085cde657901 5 *
mbed_official 87:085cde657901 6 * Redistribution and use in source and binary forms, with or without
mbed_official 87:085cde657901 7 * modification, are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 8 *
mbed_official 87:085cde657901 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 10 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 13 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 15 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 16 * without specific prior written permission.
mbed_official 87:085cde657901 17 *
mbed_official 87:085cde657901 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 28 *******************************************************************************
mbed_official 87:085cde657901 29 */
mbed_official 87:085cde657901 30 #include <stddef.h>
mbed_official 87:085cde657901 31 #include "cmsis.h"
mbed_official 87:085cde657901 32 #include "gpio_irq_api.h"
mbed_official 87:085cde657901 33 #include "pinmap.h"
mbed_official 251:de9a1e4ffd79 34 #include "error.h"
mbed_official 87:085cde657901 35
mbed_official 87:085cde657901 36 #define EDGE_NONE (0)
mbed_official 87:085cde657901 37 #define EDGE_RISE (1)
mbed_official 87:085cde657901 38 #define EDGE_FALL (2)
mbed_official 87:085cde657901 39 #define EDGE_BOTH (3)
mbed_official 87:085cde657901 40
mbed_official 125:23cc3068a9e4 41 #define CHANNEL_NUM (7)
mbed_official 87:085cde657901 42
mbed_official 125:23cc3068a9e4 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 125:23cc3068a9e4 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 87:085cde657901 46
mbed_official 87:085cde657901 47 static gpio_irq_handler irq_handler;
mbed_official 87:085cde657901 48
mbed_official 87:085cde657901 49 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 87:085cde657901 50 // Retrieve the gpio and pin that generate the irq
mbed_official 87:085cde657901 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 87:085cde657901 52 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 125:23cc3068a9e4 53
mbed_official 87:085cde657901 54 // Clear interrupt flag
mbed_official 172:2f4f8c56b261 55 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 87:085cde657901 56 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 87:085cde657901 57 }
mbed_official 172:2f4f8c56b261 58
mbed_official 87:085cde657901 59 if (channel_ids[irq_index] == 0) return;
mbed_official 172:2f4f8c56b261 60
mbed_official 87:085cde657901 61 // Check which edge has generated the irq
mbed_official 87:085cde657901 62 if ((gpio->IDR & pin) == 0) {
mbed_official 87:085cde657901 63 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 172:2f4f8c56b261 64 } else {
mbed_official 87:085cde657901 65 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 87:085cde657901 66 }
mbed_official 87:085cde657901 67 }
mbed_official 87:085cde657901 68
mbed_official 87:085cde657901 69 // The irq_index is passed to the function
mbed_official 172:2f4f8c56b261 70 // EXTI line 0
mbed_official 172:2f4f8c56b261 71 static void gpio_irq0(void) {
mbed_official 172:2f4f8c56b261 72 handle_interrupt_in(0);
mbed_official 172:2f4f8c56b261 73 }
mbed_official 172:2f4f8c56b261 74 // EXTI line 1
mbed_official 172:2f4f8c56b261 75 static void gpio_irq1(void) {
mbed_official 172:2f4f8c56b261 76 handle_interrupt_in(1);
mbed_official 172:2f4f8c56b261 77 }
mbed_official 172:2f4f8c56b261 78 // EXTI line 2
mbed_official 172:2f4f8c56b261 79 static void gpio_irq2(void) {
mbed_official 172:2f4f8c56b261 80 handle_interrupt_in(2);
mbed_official 172:2f4f8c56b261 81 }
mbed_official 172:2f4f8c56b261 82 // EXTI line 3
mbed_official 172:2f4f8c56b261 83 static void gpio_irq3(void) {
mbed_official 172:2f4f8c56b261 84 handle_interrupt_in(3);
mbed_official 172:2f4f8c56b261 85 }
mbed_official 172:2f4f8c56b261 86 // EXTI line 4
mbed_official 172:2f4f8c56b261 87 static void gpio_irq4(void) {
mbed_official 172:2f4f8c56b261 88 handle_interrupt_in(4);
mbed_official 172:2f4f8c56b261 89 }
mbed_official 172:2f4f8c56b261 90 // EXTI lines 5 to 9
mbed_official 172:2f4f8c56b261 91 static void gpio_irq5(void) {
mbed_official 172:2f4f8c56b261 92 handle_interrupt_in(5);
mbed_official 172:2f4f8c56b261 93 }
mbed_official 172:2f4f8c56b261 94 // EXTI lines 10 to 15
mbed_official 172:2f4f8c56b261 95 static void gpio_irq6(void) {
mbed_official 172:2f4f8c56b261 96 handle_interrupt_in(6);
mbed_official 172:2f4f8c56b261 97 }
mbed_official 87:085cde657901 98
mbed_official 87:085cde657901 99 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 87:085cde657901 100
mbed_official 87:085cde657901 101 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 87:085cde657901 102 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 87:085cde657901 103 uint32_t vector = 0;
mbed_official 87:085cde657901 104 uint32_t irq_index;
mbed_official 125:23cc3068a9e4 105
mbed_official 87:085cde657901 106 if (pin == NC) return -1;
mbed_official 87:085cde657901 107
mbed_official 87:085cde657901 108 uint32_t port_index = STM_PORT(pin);
mbed_official 87:085cde657901 109 uint32_t pin_index = STM_PIN(pin);
mbed_official 87:085cde657901 110
mbed_official 87:085cde657901 111 // Select irq number and interrupt routine
mbed_official 125:23cc3068a9e4 112 switch (pin_index) {
mbed_official 125:23cc3068a9e4 113 case 0:
mbed_official 125:23cc3068a9e4 114 irq_n = EXTI0_IRQn;
mbed_official 87:085cde657901 115 vector = (uint32_t)&gpio_irq0;
mbed_official 87:085cde657901 116 irq_index = 0;
mbed_official 87:085cde657901 117 break;
mbed_official 125:23cc3068a9e4 118 case 1:
mbed_official 125:23cc3068a9e4 119 irq_n = EXTI1_IRQn;
mbed_official 87:085cde657901 120 vector = (uint32_t)&gpio_irq1;
mbed_official 87:085cde657901 121 irq_index = 1;
mbed_official 87:085cde657901 122 break;
mbed_official 125:23cc3068a9e4 123 case 2:
mbed_official 125:23cc3068a9e4 124 irq_n = EXTI2_IRQn;
mbed_official 87:085cde657901 125 vector = (uint32_t)&gpio_irq2;
mbed_official 87:085cde657901 126 irq_index = 2;
mbed_official 87:085cde657901 127 break;
mbed_official 125:23cc3068a9e4 128 case 3:
mbed_official 125:23cc3068a9e4 129 irq_n = EXTI3_IRQn;
mbed_official 87:085cde657901 130 vector = (uint32_t)&gpio_irq3;
mbed_official 87:085cde657901 131 irq_index = 3;
mbed_official 87:085cde657901 132 break;
mbed_official 125:23cc3068a9e4 133 case 4:
mbed_official 125:23cc3068a9e4 134 irq_n = EXTI4_IRQn;
mbed_official 125:23cc3068a9e4 135 vector = (uint32_t)&gpio_irq4;
mbed_official 125:23cc3068a9e4 136 irq_index = 4;
mbed_official 125:23cc3068a9e4 137 break;
mbed_official 125:23cc3068a9e4 138 case 5:
mbed_official 125:23cc3068a9e4 139 case 6:
mbed_official 125:23cc3068a9e4 140 case 7:
mbed_official 125:23cc3068a9e4 141 case 8:
mbed_official 125:23cc3068a9e4 142 case 9:
mbed_official 125:23cc3068a9e4 143 irq_n = EXTI9_5_IRQn;
mbed_official 125:23cc3068a9e4 144 vector = (uint32_t)&gpio_irq5;
mbed_official 125:23cc3068a9e4 145 irq_index = 5;
mbed_official 125:23cc3068a9e4 146 break;
mbed_official 125:23cc3068a9e4 147 case 10:
mbed_official 125:23cc3068a9e4 148 case 11:
mbed_official 125:23cc3068a9e4 149 case 12:
mbed_official 125:23cc3068a9e4 150 case 13:
mbed_official 125:23cc3068a9e4 151 case 14:
mbed_official 125:23cc3068a9e4 152 case 15:
mbed_official 125:23cc3068a9e4 153 irq_n = EXTI15_10_IRQn;
mbed_official 125:23cc3068a9e4 154 vector = (uint32_t)&gpio_irq6;
mbed_official 125:23cc3068a9e4 155 irq_index = 6;
mbed_official 125:23cc3068a9e4 156 break;
mbed_official 87:085cde657901 157 default:
mbed_official 172:2f4f8c56b261 158 error("InterruptIn error: pin not supported.\n");
mbed_official 87:085cde657901 159 return -1;
mbed_official 87:085cde657901 160 }
mbed_official 87:085cde657901 161
mbed_official 87:085cde657901 162 // Enable GPIO clock
mbed_official 87:085cde657901 163 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 87:085cde657901 164
mbed_official 87:085cde657901 165 // Configure GPIO
mbed_official 87:085cde657901 166 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 172:2f4f8c56b261 167
mbed_official 87:085cde657901 168 // Enable EXTI interrupt
mbed_official 87:085cde657901 169 NVIC_SetVector(irq_n, vector);
mbed_official 87:085cde657901 170 NVIC_EnableIRQ(irq_n);
mbed_official 87:085cde657901 171
mbed_official 87:085cde657901 172 // Save informations for future use
mbed_official 87:085cde657901 173 obj->irq_n = irq_n;
mbed_official 87:085cde657901 174 obj->irq_index = irq_index;
mbed_official 87:085cde657901 175 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 176 obj->pin = pin;
mbed_official 87:085cde657901 177 channel_ids[irq_index] = id;
mbed_official 87:085cde657901 178 channel_gpio[irq_index] = gpio_add;
mbed_official 87:085cde657901 179 channel_pin[irq_index] = pin_index;
mbed_official 172:2f4f8c56b261 180
mbed_official 172:2f4f8c56b261 181 irq_handler = handler;
mbed_official 172:2f4f8c56b261 182
mbed_official 87:085cde657901 183 return 0;
mbed_official 87:085cde657901 184 }
mbed_official 87:085cde657901 185
mbed_official 87:085cde657901 186 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 87:085cde657901 187 channel_ids[obj->irq_index] = 0;
mbed_official 87:085cde657901 188 channel_gpio[obj->irq_index] = 0;
mbed_official 87:085cde657901 189 channel_pin[obj->irq_index] = 0;
mbed_official 87:085cde657901 190 // Disable EXTI line
mbed_official 87:085cde657901 191 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 87:085cde657901 192 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 193 }
mbed_official 87:085cde657901 194
mbed_official 87:085cde657901 195 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 87:085cde657901 196 uint32_t mode = STM_MODE_INPUT;
mbed_official 87:085cde657901 197 uint32_t pull = GPIO_NOPULL;
mbed_official 87:085cde657901 198
mbed_official 87:085cde657901 199 if (enable) {
mbed_official 172:2f4f8c56b261 200
mbed_official 87:085cde657901 201 pull = GPIO_NOPULL;
mbed_official 172:2f4f8c56b261 202
mbed_official 87:085cde657901 203 if (event == IRQ_RISE) {
mbed_official 87:085cde657901 204 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 87:085cde657901 205 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 87:085cde657901 206 obj->event = EDGE_BOTH;
mbed_official 172:2f4f8c56b261 207 } else { // NONE or RISE
mbed_official 87:085cde657901 208 mode = STM_MODE_IT_RISING;
mbed_official 87:085cde657901 209 obj->event = EDGE_RISE;
mbed_official 87:085cde657901 210 }
mbed_official 87:085cde657901 211 }
mbed_official 172:2f4f8c56b261 212
mbed_official 87:085cde657901 213 if (event == IRQ_FALL) {
mbed_official 87:085cde657901 214 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 87:085cde657901 215 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 87:085cde657901 216 obj->event = EDGE_BOTH;
mbed_official 172:2f4f8c56b261 217 } else { // NONE or FALL
mbed_official 87:085cde657901 218 mode = STM_MODE_IT_FALLING;
mbed_official 87:085cde657901 219 obj->event = EDGE_FALL;
mbed_official 87:085cde657901 220 }
mbed_official 87:085cde657901 221 }
mbed_official 172:2f4f8c56b261 222 } else {
mbed_official 87:085cde657901 223 mode = STM_MODE_INPUT;
mbed_official 87:085cde657901 224 pull = GPIO_NOPULL;
mbed_official 87:085cde657901 225 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 226 }
mbed_official 172:2f4f8c56b261 227
mbed_official 87:085cde657901 228 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 87:085cde657901 229 }
mbed_official 87:085cde657901 230
mbed_official 87:085cde657901 231 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 87:085cde657901 232 NVIC_EnableIRQ(obj->irq_n);
mbed_official 87:085cde657901 233 }
mbed_official 87:085cde657901 234
mbed_official 87:085cde657901 235 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 87:085cde657901 236 NVIC_DisableIRQ(obj->irq_n);
mbed_official 87:085cde657901 237 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 238 }