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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_DISCO_F051R8/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 130:1dec54e4aec3 1 /* mbed Microcontroller Library
mbed_official 130:1dec54e4aec3 2 *******************************************************************************
mbed_official 130:1dec54e4aec3 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 130:1dec54e4aec3 4 * All rights reserved.
mbed_official 130:1dec54e4aec3 5 *
mbed_official 130:1dec54e4aec3 6 * Redistribution and use in source and binary forms, with or without
mbed_official 130:1dec54e4aec3 7 * modification, are permitted provided that the following conditions are met:
mbed_official 130:1dec54e4aec3 8 *
mbed_official 130:1dec54e4aec3 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 130:1dec54e4aec3 10 * this list of conditions and the following disclaimer.
mbed_official 130:1dec54e4aec3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 130:1dec54e4aec3 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 130:1dec54e4aec3 13 * and/or other materials provided with the distribution.
mbed_official 130:1dec54e4aec3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 130:1dec54e4aec3 15 * may be used to endorse or promote products derived from this software
mbed_official 130:1dec54e4aec3 16 * without specific prior written permission.
mbed_official 130:1dec54e4aec3 17 *
mbed_official 130:1dec54e4aec3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 130:1dec54e4aec3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 130:1dec54e4aec3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 130:1dec54e4aec3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 130:1dec54e4aec3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 130:1dec54e4aec3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 130:1dec54e4aec3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 130:1dec54e4aec3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 130:1dec54e4aec3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 130:1dec54e4aec3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 130:1dec54e4aec3 28 *******************************************************************************
mbed_official 130:1dec54e4aec3 29 */
mbed_official 130:1dec54e4aec3 30 #include <stddef.h>
mbed_official 130:1dec54e4aec3 31 #include "cmsis.h"
mbed_official 130:1dec54e4aec3 32
mbed_official 130:1dec54e4aec3 33 #include "gpio_irq_api.h"
mbed_official 130:1dec54e4aec3 34 #include "pinmap.h"
mbed_official 251:de9a1e4ffd79 35 #include "error.h"
mbed_official 130:1dec54e4aec3 36
mbed_official 130:1dec54e4aec3 37 #define EDGE_NONE (0)
mbed_official 130:1dec54e4aec3 38 #define EDGE_RISE (1)
mbed_official 130:1dec54e4aec3 39 #define EDGE_FALL (2)
mbed_official 130:1dec54e4aec3 40 #define EDGE_BOTH (3)
mbed_official 130:1dec54e4aec3 41
mbed_official 130:1dec54e4aec3 42 #define CHANNEL_NUM (3)
mbed_official 130:1dec54e4aec3 43
mbed_official 130:1dec54e4aec3 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0};
mbed_official 130:1dec54e4aec3 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0};
mbed_official 130:1dec54e4aec3 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0};
mbed_official 130:1dec54e4aec3 47
mbed_official 130:1dec54e4aec3 48 static gpio_irq_handler irq_handler;
mbed_official 130:1dec54e4aec3 49
mbed_official 130:1dec54e4aec3 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 130:1dec54e4aec3 51 // Retrieve the gpio and pin that generate the irq
mbed_official 130:1dec54e4aec3 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 130:1dec54e4aec3 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 130:1dec54e4aec3 54
mbed_official 130:1dec54e4aec3 55 // Clear interrupt flag
mbed_official 240:9a7c54113eaf 56 if (EXTI_GetITStatus(pin) != RESET) {
mbed_official 130:1dec54e4aec3 57 EXTI_ClearITPendingBit(pin);
mbed_official 130:1dec54e4aec3 58 }
mbed_official 130:1dec54e4aec3 59
mbed_official 130:1dec54e4aec3 60 if (channel_ids[irq_index] == 0) return;
mbed_official 130:1dec54e4aec3 61
mbed_official 130:1dec54e4aec3 62 // Check which edge has generated the irq
mbed_official 130:1dec54e4aec3 63 if ((gpio->IDR & pin) == 0) {
mbed_official 130:1dec54e4aec3 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 240:9a7c54113eaf 65 } else {
mbed_official 130:1dec54e4aec3 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 130:1dec54e4aec3 67 }
mbed_official 130:1dec54e4aec3 68 }
mbed_official 130:1dec54e4aec3 69
mbed_official 130:1dec54e4aec3 70 // The irq_index is passed to the function
mbed_official 240:9a7c54113eaf 71 static void gpio_irq0(void) {
mbed_official 240:9a7c54113eaf 72 handle_interrupt_in(0);
mbed_official 240:9a7c54113eaf 73 }
mbed_official 240:9a7c54113eaf 74 static void gpio_irq1(void) {
mbed_official 240:9a7c54113eaf 75 handle_interrupt_in(1);
mbed_official 240:9a7c54113eaf 76 }
mbed_official 240:9a7c54113eaf 77 static void gpio_irq2(void) {
mbed_official 240:9a7c54113eaf 78 handle_interrupt_in(2);
mbed_official 240:9a7c54113eaf 79 }
mbed_official 130:1dec54e4aec3 80
mbed_official 130:1dec54e4aec3 81 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 130:1dec54e4aec3 82
mbed_official 130:1dec54e4aec3 83 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 130:1dec54e4aec3 84 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 130:1dec54e4aec3 85 uint32_t vector = 0;
mbed_official 130:1dec54e4aec3 86 uint32_t irq_index;
mbed_official 130:1dec54e4aec3 87
mbed_official 130:1dec54e4aec3 88 if (pin == NC) return -1;
mbed_official 130:1dec54e4aec3 89
mbed_official 130:1dec54e4aec3 90 uint32_t port_index = STM_PORT(pin);
mbed_official 130:1dec54e4aec3 91 uint32_t pin_index = STM_PIN(pin);
mbed_official 130:1dec54e4aec3 92
mbed_official 130:1dec54e4aec3 93 // Select irq number and interrupt routine
mbed_official 240:9a7c54113eaf 94 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 240:9a7c54113eaf 95 irq_n = EXTI0_1_IRQn;
mbed_official 130:1dec54e4aec3 96 vector = (uint32_t)&gpio_irq0;
mbed_official 130:1dec54e4aec3 97 irq_index = 0;
mbed_official 240:9a7c54113eaf 98 } else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 240:9a7c54113eaf 99 irq_n = EXTI2_3_IRQn;
mbed_official 130:1dec54e4aec3 100 vector = (uint32_t)&gpio_irq1;
mbed_official 130:1dec54e4aec3 101 irq_index = 1;
mbed_official 240:9a7c54113eaf 102 } else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 240:9a7c54113eaf 103 irq_n = EXTI4_15_IRQn;
mbed_official 130:1dec54e4aec3 104 vector = (uint32_t)&gpio_irq2;
mbed_official 130:1dec54e4aec3 105 irq_index = 2;
mbed_official 240:9a7c54113eaf 106 } else {
mbed_official 240:9a7c54113eaf 107 error("InterruptIn error: pin not supported.\n");
mbed_official 130:1dec54e4aec3 108 return -1;
mbed_official 130:1dec54e4aec3 109 }
mbed_official 130:1dec54e4aec3 110
mbed_official 130:1dec54e4aec3 111 // Enable GPIO clock
mbed_official 130:1dec54e4aec3 112 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 130:1dec54e4aec3 113
mbed_official 130:1dec54e4aec3 114 // Enable SYSCFG clock
mbed_official 130:1dec54e4aec3 115 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 130:1dec54e4aec3 116
mbed_official 130:1dec54e4aec3 117 // Connect EXTI line to pin
mbed_official 130:1dec54e4aec3 118 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 130:1dec54e4aec3 119
mbed_official 130:1dec54e4aec3 120 // Configure EXTI line
mbed_official 130:1dec54e4aec3 121 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 130:1dec54e4aec3 122 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 130:1dec54e4aec3 123 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 130:1dec54e4aec3 124 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 130:1dec54e4aec3 125 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 130:1dec54e4aec3 126 EXTI_Init(&EXTI_InitStructure);
mbed_official 130:1dec54e4aec3 127
mbed_official 130:1dec54e4aec3 128 // Enable and set EXTI interrupt to the lowest priority
mbed_official 130:1dec54e4aec3 129 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 130:1dec54e4aec3 130 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 130:1dec54e4aec3 131 NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
mbed_official 130:1dec54e4aec3 132 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 130:1dec54e4aec3 133 NVIC_Init(&NVIC_InitStructure);
mbed_official 130:1dec54e4aec3 134
mbed_official 130:1dec54e4aec3 135 NVIC_SetVector(irq_n, vector);
mbed_official 130:1dec54e4aec3 136 NVIC_EnableIRQ(irq_n);
mbed_official 130:1dec54e4aec3 137
mbed_official 130:1dec54e4aec3 138 // Save informations for future use
mbed_official 130:1dec54e4aec3 139 obj->irq_n = irq_n;
mbed_official 130:1dec54e4aec3 140 obj->irq_index = irq_index;
mbed_official 130:1dec54e4aec3 141 obj->event = EDGE_NONE;
mbed_official 130:1dec54e4aec3 142 channel_ids[irq_index] = id;
mbed_official 130:1dec54e4aec3 143 channel_gpio[irq_index] = gpio_add;
mbed_official 130:1dec54e4aec3 144 channel_pin[irq_index] = pin_index;
mbed_official 130:1dec54e4aec3 145
mbed_official 130:1dec54e4aec3 146 irq_handler = handler;
mbed_official 130:1dec54e4aec3 147
mbed_official 130:1dec54e4aec3 148 return 0;
mbed_official 130:1dec54e4aec3 149 }
mbed_official 130:1dec54e4aec3 150
mbed_official 130:1dec54e4aec3 151 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 130:1dec54e4aec3 152 channel_ids[obj->irq_index] = 0;
mbed_official 130:1dec54e4aec3 153 channel_gpio[obj->irq_index] = 0;
mbed_official 130:1dec54e4aec3 154 channel_pin[obj->irq_index] = 0;
mbed_official 130:1dec54e4aec3 155 // Disable EXTI line
mbed_official 130:1dec54e4aec3 156 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 130:1dec54e4aec3 157 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 130:1dec54e4aec3 158 EXTI_Init(&EXTI_InitStructure);
mbed_official 130:1dec54e4aec3 159 obj->event = EDGE_NONE;
mbed_official 130:1dec54e4aec3 160 }
mbed_official 130:1dec54e4aec3 161
mbed_official 130:1dec54e4aec3 162 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 130:1dec54e4aec3 163 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 130:1dec54e4aec3 164
mbed_official 130:1dec54e4aec3 165 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 130:1dec54e4aec3 166
mbed_official 130:1dec54e4aec3 167 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 130:1dec54e4aec3 168 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 130:1dec54e4aec3 169
mbed_official 130:1dec54e4aec3 170 if (event == IRQ_RISE) {
mbed_official 130:1dec54e4aec3 171 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 130:1dec54e4aec3 172 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 130:1dec54e4aec3 173 obj->event = EDGE_BOTH;
mbed_official 240:9a7c54113eaf 174 } else { // NONE or RISE
mbed_official 130:1dec54e4aec3 175 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 130:1dec54e4aec3 176 obj->event = EDGE_RISE;
mbed_official 130:1dec54e4aec3 177 }
mbed_official 130:1dec54e4aec3 178 }
mbed_official 130:1dec54e4aec3 179
mbed_official 130:1dec54e4aec3 180 if (event == IRQ_FALL) {
mbed_official 130:1dec54e4aec3 181 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 130:1dec54e4aec3 182 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 130:1dec54e4aec3 183 obj->event = EDGE_BOTH;
mbed_official 240:9a7c54113eaf 184 } else { // NONE or FALL
mbed_official 130:1dec54e4aec3 185 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 130:1dec54e4aec3 186 obj->event = EDGE_FALL;
mbed_official 130:1dec54e4aec3 187 }
mbed_official 130:1dec54e4aec3 188 }
mbed_official 130:1dec54e4aec3 189
mbed_official 130:1dec54e4aec3 190 if (enable) {
mbed_official 130:1dec54e4aec3 191 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 240:9a7c54113eaf 192 } else {
mbed_official 130:1dec54e4aec3 193 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 130:1dec54e4aec3 194 }
mbed_official 130:1dec54e4aec3 195
mbed_official 130:1dec54e4aec3 196 EXTI_Init(&EXTI_InitStructure);
mbed_official 130:1dec54e4aec3 197 }
mbed_official 130:1dec54e4aec3 198
mbed_official 130:1dec54e4aec3 199 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 130:1dec54e4aec3 200 NVIC_EnableIRQ(obj->irq_n);
mbed_official 130:1dec54e4aec3 201 }
mbed_official 130:1dec54e4aec3 202
mbed_official 130:1dec54e4aec3 203 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 130:1dec54e4aec3 204 NVIC_DisableIRQ(obj->irq_n);
mbed_official 130:1dec54e4aec3 205 obj->event = EDGE_NONE;
mbed_official 130:1dec54e4aec3 206 }