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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_L152RE/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 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include <stddef.h>
mbed_official 76:aeb1df146756 31 #include "cmsis.h"
mbed_official 76:aeb1df146756 32 #include "gpio_irq_api.h"
mbed_official 76:aeb1df146756 33 #include "pinmap.h"
mbed_official 251:de9a1e4ffd79 34 #include "error.h"
mbed_official 76:aeb1df146756 35
mbed_official 76:aeb1df146756 36 #define EDGE_NONE (0)
mbed_official 76:aeb1df146756 37 #define EDGE_RISE (1)
mbed_official 76:aeb1df146756 38 #define EDGE_FALL (2)
mbed_official 76:aeb1df146756 39 #define EDGE_BOTH (3)
mbed_official 76:aeb1df146756 40
mbed_official 156:38b9eb24e1d1 41 #define CHANNEL_NUM (7)
mbed_official 76:aeb1df146756 42
mbed_official 156:38b9eb24e1d1 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 156:38b9eb24e1d1 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 156:38b9eb24e1d1 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 76:aeb1df146756 46
mbed_official 76:aeb1df146756 47 static gpio_irq_handler irq_handler;
mbed_official 76:aeb1df146756 48
mbed_official 76:aeb1df146756 49 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 76:aeb1df146756 50 // Retrieve the gpio and pin that generate the irq
mbed_official 76:aeb1df146756 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 76:aeb1df146756 52 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 156:38b9eb24e1d1 53
mbed_official 76:aeb1df146756 54 // Clear interrupt flag
mbed_official 174:8bb9f3a33240 55 if (EXTI_GetITStatus(pin) != RESET) {
mbed_official 76:aeb1df146756 56 EXTI_ClearITPendingBit(pin);
mbed_official 76:aeb1df146756 57 }
mbed_official 174:8bb9f3a33240 58
mbed_official 76:aeb1df146756 59 if (channel_ids[irq_index] == 0) return;
mbed_official 174:8bb9f3a33240 60
mbed_official 76:aeb1df146756 61 // Check which edge has generated the irq
mbed_official 76:aeb1df146756 62 if ((gpio->IDR & pin) == 0) {
mbed_official 76:aeb1df146756 63 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 174:8bb9f3a33240 64 } else {
mbed_official 76:aeb1df146756 65 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 76:aeb1df146756 66 }
mbed_official 76:aeb1df146756 67 }
mbed_official 76:aeb1df146756 68
mbed_official 76:aeb1df146756 69 // The irq_index is passed to the function
mbed_official 174:8bb9f3a33240 70 static void gpio_irq0(void) {
mbed_official 174:8bb9f3a33240 71 handle_interrupt_in(0); // EXTI line 0
mbed_official 174:8bb9f3a33240 72 }
mbed_official 174:8bb9f3a33240 73 static void gpio_irq1(void) {
mbed_official 174:8bb9f3a33240 74 handle_interrupt_in(1); // EXTI line 1
mbed_official 174:8bb9f3a33240 75 }
mbed_official 174:8bb9f3a33240 76 static void gpio_irq2(void) {
mbed_official 174:8bb9f3a33240 77 handle_interrupt_in(2); // EXTI line 2
mbed_official 174:8bb9f3a33240 78 }
mbed_official 174:8bb9f3a33240 79 static void gpio_irq3(void) {
mbed_official 174:8bb9f3a33240 80 handle_interrupt_in(3); // EXTI line 3
mbed_official 174:8bb9f3a33240 81 }
mbed_official 174:8bb9f3a33240 82 static void gpio_irq4(void) {
mbed_official 174:8bb9f3a33240 83 handle_interrupt_in(4); // EXTI line 4
mbed_official 174:8bb9f3a33240 84 }
mbed_official 174:8bb9f3a33240 85 static void gpio_irq5(void) {
mbed_official 174:8bb9f3a33240 86 handle_interrupt_in(5); // EXTI lines 5 to 9
mbed_official 174:8bb9f3a33240 87 }
mbed_official 174:8bb9f3a33240 88 static void gpio_irq6(void) {
mbed_official 174:8bb9f3a33240 89 handle_interrupt_in(6); // EXTI lines 10 to 15
mbed_official 174:8bb9f3a33240 90 }
mbed_official 76:aeb1df146756 91
mbed_official 76:aeb1df146756 92 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 76:aeb1df146756 93
mbed_official 76:aeb1df146756 94 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 76:aeb1df146756 95 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 76:aeb1df146756 96 uint32_t vector = 0;
mbed_official 76:aeb1df146756 97 uint32_t irq_index;
mbed_official 76:aeb1df146756 98
mbed_official 76:aeb1df146756 99 if (pin == NC) return -1;
mbed_official 76:aeb1df146756 100
mbed_official 76:aeb1df146756 101 uint32_t port_index = STM_PORT(pin);
mbed_official 76:aeb1df146756 102 uint32_t pin_index = STM_PIN(pin);
mbed_official 76:aeb1df146756 103
mbed_official 76:aeb1df146756 104 // Select irq number and interrupt routine
mbed_official 156:38b9eb24e1d1 105 switch (pin_index) {
mbed_official 156:38b9eb24e1d1 106 case 0:
mbed_official 156:38b9eb24e1d1 107 irq_n = EXTI0_IRQn;
mbed_official 76:aeb1df146756 108 vector = (uint32_t)&gpio_irq0;
mbed_official 76:aeb1df146756 109 irq_index = 0;
mbed_official 76:aeb1df146756 110 break;
mbed_official 156:38b9eb24e1d1 111 case 1:
mbed_official 156:38b9eb24e1d1 112 irq_n = EXTI1_IRQn;
mbed_official 76:aeb1df146756 113 vector = (uint32_t)&gpio_irq1;
mbed_official 76:aeb1df146756 114 irq_index = 1;
mbed_official 76:aeb1df146756 115 break;
mbed_official 156:38b9eb24e1d1 116 case 2:
mbed_official 156:38b9eb24e1d1 117 irq_n = EXTI2_IRQn;
mbed_official 76:aeb1df146756 118 vector = (uint32_t)&gpio_irq2;
mbed_official 76:aeb1df146756 119 irq_index = 2;
mbed_official 76:aeb1df146756 120 break;
mbed_official 156:38b9eb24e1d1 121 case 3:
mbed_official 156:38b9eb24e1d1 122 irq_n = EXTI3_IRQn;
mbed_official 76:aeb1df146756 123 vector = (uint32_t)&gpio_irq3;
mbed_official 76:aeb1df146756 124 irq_index = 3;
mbed_official 76:aeb1df146756 125 break;
mbed_official 156:38b9eb24e1d1 126 case 4:
mbed_official 156:38b9eb24e1d1 127 irq_n = EXTI4_IRQn;
mbed_official 156:38b9eb24e1d1 128 vector = (uint32_t)&gpio_irq4;
mbed_official 156:38b9eb24e1d1 129 irq_index = 4;
mbed_official 156:38b9eb24e1d1 130 break;
mbed_official 156:38b9eb24e1d1 131 case 5:
mbed_official 156:38b9eb24e1d1 132 case 6:
mbed_official 156:38b9eb24e1d1 133 case 7:
mbed_official 156:38b9eb24e1d1 134 case 8:
mbed_official 156:38b9eb24e1d1 135 case 9:
mbed_official 156:38b9eb24e1d1 136 irq_n = EXTI9_5_IRQn;
mbed_official 156:38b9eb24e1d1 137 vector = (uint32_t)&gpio_irq5;
mbed_official 156:38b9eb24e1d1 138 irq_index = 5;
mbed_official 156:38b9eb24e1d1 139 break;
mbed_official 156:38b9eb24e1d1 140 case 10:
mbed_official 156:38b9eb24e1d1 141 case 11:
mbed_official 156:38b9eb24e1d1 142 case 12:
mbed_official 156:38b9eb24e1d1 143 case 13:
mbed_official 156:38b9eb24e1d1 144 case 14:
mbed_official 156:38b9eb24e1d1 145 case 15:
mbed_official 156:38b9eb24e1d1 146 irq_n = EXTI15_10_IRQn;
mbed_official 156:38b9eb24e1d1 147 vector = (uint32_t)&gpio_irq6;
mbed_official 156:38b9eb24e1d1 148 irq_index = 6;
mbed_official 156:38b9eb24e1d1 149 break;
mbed_official 76:aeb1df146756 150 default:
mbed_official 156:38b9eb24e1d1 151 error("InterruptIn error: pin not supported.\n");
mbed_official 76:aeb1df146756 152 return -1;
mbed_official 76:aeb1df146756 153 }
mbed_official 76:aeb1df146756 154
mbed_official 76:aeb1df146756 155 // Enable GPIO clock
mbed_official 76:aeb1df146756 156 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 76:aeb1df146756 157
mbed_official 76:aeb1df146756 158 // Enable SYSCFG clock
mbed_official 76:aeb1df146756 159 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 174:8bb9f3a33240 160
mbed_official 76:aeb1df146756 161 // Connect EXTI line to pin
mbed_official 76:aeb1df146756 162 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 76:aeb1df146756 163
mbed_official 76:aeb1df146756 164 // Configure EXTI line
mbed_official 174:8bb9f3a33240 165 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 76:aeb1df146756 166 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 76:aeb1df146756 167 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 76:aeb1df146756 168 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 76:aeb1df146756 169 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 76:aeb1df146756 170 EXTI_Init(&EXTI_InitStructure);
mbed_official 174:8bb9f3a33240 171
mbed_official 76:aeb1df146756 172 // Enable and set EXTI interrupt to the lowest priority
mbed_official 76:aeb1df146756 173 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 76:aeb1df146756 174 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 76:aeb1df146756 175 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
mbed_official 76:aeb1df146756 176 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
mbed_official 76:aeb1df146756 177 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 76:aeb1df146756 178 NVIC_Init(&NVIC_InitStructure);
mbed_official 174:8bb9f3a33240 179
mbed_official 76:aeb1df146756 180 NVIC_SetVector(irq_n, vector);
mbed_official 76:aeb1df146756 181 NVIC_EnableIRQ(irq_n);
mbed_official 76:aeb1df146756 182
mbed_official 76:aeb1df146756 183 // Save informations for future use
mbed_official 76:aeb1df146756 184 obj->irq_n = irq_n;
mbed_official 76:aeb1df146756 185 obj->irq_index = irq_index;
mbed_official 76:aeb1df146756 186 obj->event = EDGE_NONE;
mbed_official 76:aeb1df146756 187 channel_ids[irq_index] = id;
mbed_official 76:aeb1df146756 188 channel_gpio[irq_index] = gpio_add;
mbed_official 76:aeb1df146756 189 channel_pin[irq_index] = pin_index;
mbed_official 174:8bb9f3a33240 190
mbed_official 174:8bb9f3a33240 191 irq_handler = handler;
mbed_official 174:8bb9f3a33240 192
mbed_official 76:aeb1df146756 193 return 0;
mbed_official 76:aeb1df146756 194 }
mbed_official 76:aeb1df146756 195
mbed_official 76:aeb1df146756 196 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 76:aeb1df146756 197 channel_ids[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 198 channel_gpio[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 199 channel_pin[obj->irq_index] = 0;
mbed_official 76:aeb1df146756 200 // Disable EXTI line
mbed_official 76:aeb1df146756 201 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 76:aeb1df146756 202 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 174:8bb9f3a33240 203 EXTI_Init(&EXTI_InitStructure);
mbed_official 76:aeb1df146756 204 obj->event = EDGE_NONE;
mbed_official 76:aeb1df146756 205 }
mbed_official 76:aeb1df146756 206
mbed_official 76:aeb1df146756 207 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 76:aeb1df146756 208 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 174:8bb9f3a33240 209
mbed_official 76:aeb1df146756 210 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 76:aeb1df146756 211
mbed_official 76:aeb1df146756 212 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 76:aeb1df146756 213 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 174:8bb9f3a33240 214
mbed_official 76:aeb1df146756 215 if (event == IRQ_RISE) {
mbed_official 76:aeb1df146756 216 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 76:aeb1df146756 217 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 76:aeb1df146756 218 obj->event = EDGE_BOTH;
mbed_official 174:8bb9f3a33240 219 } else { // NONE or RISE
mbed_official 76:aeb1df146756 220 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 76:aeb1df146756 221 obj->event = EDGE_RISE;
mbed_official 76:aeb1df146756 222 }
mbed_official 76:aeb1df146756 223 }
mbed_official 174:8bb9f3a33240 224
mbed_official 76:aeb1df146756 225 if (event == IRQ_FALL) {
mbed_official 76:aeb1df146756 226 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 76:aeb1df146756 227 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 76:aeb1df146756 228 obj->event = EDGE_BOTH;
mbed_official 174:8bb9f3a33240 229 } else { // NONE or FALL
mbed_official 76:aeb1df146756 230 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 76:aeb1df146756 231 obj->event = EDGE_FALL;
mbed_official 76:aeb1df146756 232 }
mbed_official 76:aeb1df146756 233 }
mbed_official 174:8bb9f3a33240 234
mbed_official 76:aeb1df146756 235 if (enable) {
mbed_official 76:aeb1df146756 236 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 174:8bb9f3a33240 237 } else {
mbed_official 76:aeb1df146756 238 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 76:aeb1df146756 239 }
mbed_official 174:8bb9f3a33240 240
mbed_official 76:aeb1df146756 241 EXTI_Init(&EXTI_InitStructure);
mbed_official 76:aeb1df146756 242 }
mbed_official 76:aeb1df146756 243
mbed_official 76:aeb1df146756 244 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 76:aeb1df146756 245 NVIC_EnableIRQ(obj->irq_n);
mbed_official 76:aeb1df146756 246 }
mbed_official 76:aeb1df146756 247
mbed_official 76:aeb1df146756 248 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 76:aeb1df146756 249 NVIC_DisableIRQ(obj->irq_n);
mbed_official 76:aeb1df146756 250 obj->event = EDGE_NONE;
mbed_official 76:aeb1df146756 251 }