Toyomasa Watarai / mbed-src

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targets/hal/TARGET_STM/TARGET_NUCLEO_F091RC/gpio_irq_api.c@412:ea78ced42a1f, 2014-11-27 (annotated)

Committer:
MACRUM
Date:
Thu Nov 27 06:27:12 2014 +0000
Revision:
412:ea78ced42a1f
Parent:
340:28d1f895c6fe 
Fixed I2C issue (temporary) in RZ/A1H

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 340:28d1f895c6fe 1 /* mbed Microcontroller Library
mbed_official 340:28d1f895c6fe 2 *******************************************************************************
mbed_official 340:28d1f895c6fe 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 340:28d1f895c6fe 4 * All rights reserved.
mbed_official 340:28d1f895c6fe 5 *
mbed_official 340:28d1f895c6fe 6 * Redistribution and use in source and binary forms, with or without
mbed_official 340:28d1f895c6fe 7 * modification, are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 8 *
mbed_official 340:28d1f895c6fe 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 10 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 13 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 15 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 16 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 17 *
mbed_official 340:28d1f895c6fe 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 28 *******************************************************************************
mbed_official 340:28d1f895c6fe 29 */
mbed_official 340:28d1f895c6fe 30 #include <stddef.h>
mbed_official 340:28d1f895c6fe 31 #include "cmsis.h"
mbed_official 340:28d1f895c6fe 32 #include "gpio_irq_api.h"
mbed_official 340:28d1f895c6fe 33 #include "pinmap.h"
mbed_official 340:28d1f895c6fe 34 #include "mbed_error.h"
mbed_official 340:28d1f895c6fe 35
mbed_official 340:28d1f895c6fe 36 #define EDGE_NONE (0)
mbed_official 340:28d1f895c6fe 37 #define EDGE_RISE (1)
mbed_official 340:28d1f895c6fe 38 #define EDGE_FALL (2)
mbed_official 340:28d1f895c6fe 39 #define EDGE_BOTH (3)
mbed_official 340:28d1f895c6fe 40
mbed_official 340:28d1f895c6fe 41 // EXTI lines: 0-1, 2-3 and 4-15
mbed_official 340:28d1f895c6fe 42 #define CHANNEL_NUM (3)
mbed_official 340:28d1f895c6fe 43
mbed_official 340:28d1f895c6fe 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0};
mbed_official 340:28d1f895c6fe 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0};
mbed_official 340:28d1f895c6fe 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0};
mbed_official 340:28d1f895c6fe 47
mbed_official 340:28d1f895c6fe 48 static gpio_irq_handler irq_handler;
mbed_official 340:28d1f895c6fe 49
mbed_official 340:28d1f895c6fe 50 static void handle_interrupt_in(uint32_t irq_index)
mbed_official 340:28d1f895c6fe 51 {
mbed_official 340:28d1f895c6fe 52 // Retrieve the gpio and pin that generate the irq
mbed_official 340:28d1f895c6fe 53 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 340:28d1f895c6fe 54 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 340:28d1f895c6fe 55
mbed_official 340:28d1f895c6fe 56 // Clear interrupt flag
mbed_official 340:28d1f895c6fe 57 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 340:28d1f895c6fe 58 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 340:28d1f895c6fe 59 }
mbed_official 340:28d1f895c6fe 60
mbed_official 340:28d1f895c6fe 61 if (channel_ids[irq_index] == 0) return;
mbed_official 340:28d1f895c6fe 62
mbed_official 340:28d1f895c6fe 63 // Check which edge has generated the irq
mbed_official 340:28d1f895c6fe 64 if ((gpio->IDR & pin) == 0) {
mbed_official 340:28d1f895c6fe 65 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 340:28d1f895c6fe 66 } else {
mbed_official 340:28d1f895c6fe 67 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 340:28d1f895c6fe 68 }
mbed_official 340:28d1f895c6fe 69 }
mbed_official 340:28d1f895c6fe 70
mbed_official 340:28d1f895c6fe 71 // EXTI lines 0 to 1
mbed_official 340:28d1f895c6fe 72 static void gpio_irq0(void)
mbed_official 340:28d1f895c6fe 73 {
mbed_official 340:28d1f895c6fe 74 handle_interrupt_in(0);
mbed_official 340:28d1f895c6fe 75 }
mbed_official 340:28d1f895c6fe 76 // EXTI lines 2 to 3
mbed_official 340:28d1f895c6fe 77 static void gpio_irq1(void)
mbed_official 340:28d1f895c6fe 78 {
mbed_official 340:28d1f895c6fe 79 handle_interrupt_in(1);
mbed_official 340:28d1f895c6fe 80 }
mbed_official 340:28d1f895c6fe 81 // EXTI lines 4 to 15
mbed_official 340:28d1f895c6fe 82 static void gpio_irq2(void)
mbed_official 340:28d1f895c6fe 83 {
mbed_official 340:28d1f895c6fe 84 handle_interrupt_in(2);
mbed_official 340:28d1f895c6fe 85 }
mbed_official 340:28d1f895c6fe 86
mbed_official 340:28d1f895c6fe 87 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 340:28d1f895c6fe 88
mbed_official 340:28d1f895c6fe 89 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 340:28d1f895c6fe 90 {
mbed_official 340:28d1f895c6fe 91 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 340:28d1f895c6fe 92 uint32_t vector = 0;
mbed_official 340:28d1f895c6fe 93 uint32_t irq_index;
mbed_official 340:28d1f895c6fe 94
mbed_official 340:28d1f895c6fe 95 if (pin == NC) return -1;
mbed_official 340:28d1f895c6fe 96
mbed_official 340:28d1f895c6fe 97 uint32_t port_index = STM_PORT(pin);
mbed_official 340:28d1f895c6fe 98 uint32_t pin_index = STM_PIN(pin);
mbed_official 340:28d1f895c6fe 99
mbed_official 340:28d1f895c6fe 100 // Select irq number and interrupt routine
mbed_official 340:28d1f895c6fe 101 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 340:28d1f895c6fe 102 irq_n = EXTI0_1_IRQn;
mbed_official 340:28d1f895c6fe 103 vector = (uint32_t)&gpio_irq0;
mbed_official 340:28d1f895c6fe 104 irq_index = 0;
mbed_official 340:28d1f895c6fe 105 } else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 340:28d1f895c6fe 106 irq_n = EXTI2_3_IRQn;
mbed_official 340:28d1f895c6fe 107 vector = (uint32_t)&gpio_irq1;
mbed_official 340:28d1f895c6fe 108 irq_index = 1;
mbed_official 340:28d1f895c6fe 109 } else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 340:28d1f895c6fe 110 irq_n = EXTI4_15_IRQn;
mbed_official 340:28d1f895c6fe 111 vector = (uint32_t)&gpio_irq2;
mbed_official 340:28d1f895c6fe 112 irq_index = 2;
mbed_official 340:28d1f895c6fe 113 } else {
mbed_official 340:28d1f895c6fe 114 error("InterruptIn error: pin not supported.\n");
mbed_official 340:28d1f895c6fe 115 return -1;
mbed_official 340:28d1f895c6fe 116 }
mbed_official 340:28d1f895c6fe 117
mbed_official 340:28d1f895c6fe 118 // Enable GPIO clock
mbed_official 340:28d1f895c6fe 119 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 340:28d1f895c6fe 120
mbed_official 340:28d1f895c6fe 121 // Configure GPIO
mbed_official 340:28d1f895c6fe 122 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 340:28d1f895c6fe 123
mbed_official 340:28d1f895c6fe 124 // Enable EXTI interrupt
mbed_official 340:28d1f895c6fe 125 NVIC_SetVector(irq_n, vector);
mbed_official 340:28d1f895c6fe 126 NVIC_EnableIRQ(irq_n);
mbed_official 340:28d1f895c6fe 127
mbed_official 340:28d1f895c6fe 128 // Save informations for future use
mbed_official 340:28d1f895c6fe 129 obj->irq_n = irq_n;
mbed_official 340:28d1f895c6fe 130 obj->irq_index = irq_index;
mbed_official 340:28d1f895c6fe 131 obj->event = EDGE_NONE;
mbed_official 340:28d1f895c6fe 132 obj->pin = pin;
mbed_official 340:28d1f895c6fe 133 channel_ids[irq_index] = id;
mbed_official 340:28d1f895c6fe 134 channel_gpio[irq_index] = gpio_add;
mbed_official 340:28d1f895c6fe 135 channel_pin[irq_index] = pin_index;
mbed_official 340:28d1f895c6fe 136
mbed_official 340:28d1f895c6fe 137 irq_handler = handler;
mbed_official 340:28d1f895c6fe 138
mbed_official 340:28d1f895c6fe 139 return 0;
mbed_official 340:28d1f895c6fe 140 }
mbed_official 340:28d1f895c6fe 141
mbed_official 340:28d1f895c6fe 142 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 340:28d1f895c6fe 143 {
mbed_official 340:28d1f895c6fe 144 channel_ids[obj->irq_index] = 0;
mbed_official 340:28d1f895c6fe 145 channel_gpio[obj->irq_index] = 0;
mbed_official 340:28d1f895c6fe 146 channel_pin[obj->irq_index] = 0;
mbed_official 340:28d1f895c6fe 147 // Disable EXTI line
mbed_official 340:28d1f895c6fe 148 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 340:28d1f895c6fe 149 obj->event = EDGE_NONE;
mbed_official 340:28d1f895c6fe 150 }
mbed_official 340:28d1f895c6fe 151
mbed_official 340:28d1f895c6fe 152 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 340:28d1f895c6fe 153 {
mbed_official 340:28d1f895c6fe 154 uint32_t mode = STM_MODE_IT_EVT_RESET;
mbed_official 340:28d1f895c6fe 155 uint32_t pull = GPIO_NOPULL;
mbed_official 340:28d1f895c6fe 156
mbed_official 340:28d1f895c6fe 157 if (enable) {
mbed_official 340:28d1f895c6fe 158 if (event == IRQ_RISE) {
mbed_official 340:28d1f895c6fe 159 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 340:28d1f895c6fe 160 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 340:28d1f895c6fe 161 obj->event = EDGE_BOTH;
mbed_official 340:28d1f895c6fe 162 } else { // NONE or RISE
mbed_official 340:28d1f895c6fe 163 mode = STM_MODE_IT_RISING;
mbed_official 340:28d1f895c6fe 164 obj->event = EDGE_RISE;
mbed_official 340:28d1f895c6fe 165 }
mbed_official 340:28d1f895c6fe 166 }
mbed_official 340:28d1f895c6fe 167 if (event == IRQ_FALL) {
mbed_official 340:28d1f895c6fe 168 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 340:28d1f895c6fe 169 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 340:28d1f895c6fe 170 obj->event = EDGE_BOTH;
mbed_official 340:28d1f895c6fe 171 } else { // NONE or FALL
mbed_official 340:28d1f895c6fe 172 mode = STM_MODE_IT_FALLING;
mbed_official 340:28d1f895c6fe 173 obj->event = EDGE_FALL;
mbed_official 340:28d1f895c6fe 174 }
mbed_official 340:28d1f895c6fe 175 }
mbed_official 340:28d1f895c6fe 176 } else { // Disable
mbed_official 340:28d1f895c6fe 177 if (event == IRQ_RISE) {
mbed_official 340:28d1f895c6fe 178 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 340:28d1f895c6fe 179 mode = STM_MODE_IT_FALLING;
mbed_official 340:28d1f895c6fe 180 obj->event = EDGE_FALL;
mbed_official 340:28d1f895c6fe 181 } else { // NONE or RISE
mbed_official 340:28d1f895c6fe 182 mode = STM_MODE_IT_EVT_RESET;
mbed_official 340:28d1f895c6fe 183 obj->event = EDGE_NONE;
mbed_official 340:28d1f895c6fe 184 }
mbed_official 340:28d1f895c6fe 185 }
mbed_official 340:28d1f895c6fe 186 if (event == IRQ_FALL) {
mbed_official 340:28d1f895c6fe 187 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 340:28d1f895c6fe 188 mode = STM_MODE_IT_RISING;
mbed_official 340:28d1f895c6fe 189 obj->event = EDGE_RISE;
mbed_official 340:28d1f895c6fe 190 } else { // NONE or FALL
mbed_official 340:28d1f895c6fe 191 mode = STM_MODE_IT_EVT_RESET;
mbed_official 340:28d1f895c6fe 192 obj->event = EDGE_NONE;
mbed_official 340:28d1f895c6fe 193 }
mbed_official 340:28d1f895c6fe 194 }
mbed_official 340:28d1f895c6fe 195 }
mbed_official 340:28d1f895c6fe 196
mbed_official 340:28d1f895c6fe 197 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 340:28d1f895c6fe 198 }
mbed_official 340:28d1f895c6fe 199
mbed_official 340:28d1f895c6fe 200 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 340:28d1f895c6fe 201 {
mbed_official 340:28d1f895c6fe 202 NVIC_EnableIRQ(obj->irq_n);
mbed_official 340:28d1f895c6fe 203 }
mbed_official 340:28d1f895c6fe 204
mbed_official 340:28d1f895c6fe 205 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 340:28d1f895c6fe 206 {
mbed_official 340:28d1f895c6fe 207 NVIC_DisableIRQ(obj->irq_n);
mbed_official 340:28d1f895c6fe 208 obj->event = EDGE_NONE;
mbed_official 340:28d1f895c6fe 209 }