Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/gpio_irq_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
219:993c9b0acbcc
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 *******************************************************************************
mbed_official 219:993c9b0acbcc 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 4 * All rights reserved.
mbed_official 219:993c9b0acbcc 5 *
mbed_official 219:993c9b0acbcc 6 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 7 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 8 *
mbed_official 219:993c9b0acbcc 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 10 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 13 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 15 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 16 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 17 *
mbed_official 219:993c9b0acbcc 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 28 *******************************************************************************
mbed_official 219:993c9b0acbcc 29 */
mbed_official 219:993c9b0acbcc 30 #include <stddef.h>
mbed_official 219:993c9b0acbcc 31 #include "cmsis.h"
mbed_official 219:993c9b0acbcc 32 #include "gpio_irq_api.h"
mbed_official 219:993c9b0acbcc 33 #include "pinmap.h"
mbed_official 250:a49055e7a707 34 #include "mbed_error.h"
mbed_official 219:993c9b0acbcc 35
mbed_official 219:993c9b0acbcc 36 #define EDGE_NONE (0)
mbed_official 219:993c9b0acbcc 37 #define EDGE_RISE (1)
mbed_official 219:993c9b0acbcc 38 #define EDGE_FALL (2)
mbed_official 219:993c9b0acbcc 39 #define EDGE_BOTH (3)
mbed_official 219:993c9b0acbcc 40
mbed_official 219:993c9b0acbcc 41 // EXTI lines: 0-1, 2-3 and 4-15
mbed_official 219:993c9b0acbcc 42 #define CHANNEL_NUM (3)
mbed_official 219:993c9b0acbcc 43
mbed_official 219:993c9b0acbcc 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0};
mbed_official 219:993c9b0acbcc 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0};
mbed_official 219:993c9b0acbcc 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0};
mbed_official 219:993c9b0acbcc 47
mbed_official 219:993c9b0acbcc 48 static gpio_irq_handler irq_handler;
mbed_official 219:993c9b0acbcc 49
mbed_official 219:993c9b0acbcc 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 219:993c9b0acbcc 51 // Retrieve the gpio and pin that generate the irq
mbed_official 219:993c9b0acbcc 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 219:993c9b0acbcc 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 219:993c9b0acbcc 54
mbed_official 219:993c9b0acbcc 55 // Clear interrupt flag
mbed_official 219:993c9b0acbcc 56 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 219:993c9b0acbcc 57 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 219:993c9b0acbcc 58 }
mbed_official 219:993c9b0acbcc 59
mbed_official 219:993c9b0acbcc 60 if (channel_ids[irq_index] == 0) return;
mbed_official 219:993c9b0acbcc 61
mbed_official 219:993c9b0acbcc 62 // Check which edge has generated the irq
mbed_official 219:993c9b0acbcc 63 if ((gpio->IDR & pin) == 0) {
mbed_official 219:993c9b0acbcc 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 219:993c9b0acbcc 65 } else {
mbed_official 219:993c9b0acbcc 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 219:993c9b0acbcc 67 }
mbed_official 219:993c9b0acbcc 68 }
mbed_official 219:993c9b0acbcc 69
mbed_official 219:993c9b0acbcc 70 // EXTI lines 0 to 1
mbed_official 219:993c9b0acbcc 71 static void gpio_irq0(void) {
mbed_official 219:993c9b0acbcc 72 handle_interrupt_in(0);
mbed_official 219:993c9b0acbcc 73 }
mbed_official 219:993c9b0acbcc 74 // EXTI lines 2 to 3
mbed_official 219:993c9b0acbcc 75 static void gpio_irq1(void) {
mbed_official 219:993c9b0acbcc 76 handle_interrupt_in(1);
mbed_official 219:993c9b0acbcc 77 }
mbed_official 219:993c9b0acbcc 78 // EXTI lines 4 to 15
mbed_official 219:993c9b0acbcc 79 static void gpio_irq2(void) {
mbed_official 219:993c9b0acbcc 80 handle_interrupt_in(2);
mbed_official 219:993c9b0acbcc 81 }
mbed_official 219:993c9b0acbcc 82
mbed_official 219:993c9b0acbcc 83 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 219:993c9b0acbcc 84
mbed_official 219:993c9b0acbcc 85 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 219:993c9b0acbcc 86 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 219:993c9b0acbcc 87 uint32_t vector = 0;
mbed_official 219:993c9b0acbcc 88 uint32_t irq_index;
mbed_official 219:993c9b0acbcc 89
mbed_official 219:993c9b0acbcc 90 if (pin == NC) return -1;
mbed_official 219:993c9b0acbcc 91
mbed_official 219:993c9b0acbcc 92 uint32_t port_index = STM_PORT(pin);
mbed_official 219:993c9b0acbcc 93 uint32_t pin_index = STM_PIN(pin);
mbed_official 219:993c9b0acbcc 94
mbed_official 219:993c9b0acbcc 95 // Select irq number and interrupt routine
mbed_official 219:993c9b0acbcc 96 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 219:993c9b0acbcc 97 irq_n = EXTI0_1_IRQn;
mbed_official 219:993c9b0acbcc 98 vector = (uint32_t)&gpio_irq0;
mbed_official 219:993c9b0acbcc 99 irq_index = 0;
mbed_official 219:993c9b0acbcc 100 } else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 219:993c9b0acbcc 101 irq_n = EXTI2_3_IRQn;
mbed_official 219:993c9b0acbcc 102 vector = (uint32_t)&gpio_irq1;
mbed_official 219:993c9b0acbcc 103 irq_index = 1;
mbed_official 219:993c9b0acbcc 104 } else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 219:993c9b0acbcc 105 irq_n = EXTI4_15_IRQn;
mbed_official 219:993c9b0acbcc 106 vector = (uint32_t)&gpio_irq2;
mbed_official 219:993c9b0acbcc 107 irq_index = 2;
mbed_official 219:993c9b0acbcc 108 } else {
mbed_official 219:993c9b0acbcc 109 error("InterruptIn error: pin not supported.\n");
mbed_official 219:993c9b0acbcc 110 return -1;
mbed_official 219:993c9b0acbcc 111 }
mbed_official 219:993c9b0acbcc 112
mbed_official 219:993c9b0acbcc 113 // Enable GPIO clock
mbed_official 219:993c9b0acbcc 114 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 219:993c9b0acbcc 115
mbed_official 219:993c9b0acbcc 116 // Configure GPIO
mbed_official 219:993c9b0acbcc 117 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 118
mbed_official 219:993c9b0acbcc 119 // Enable EXTI interrupt
mbed_official 219:993c9b0acbcc 120 NVIC_SetVector(irq_n, vector);
mbed_official 219:993c9b0acbcc 121 NVIC_EnableIRQ(irq_n);
mbed_official 219:993c9b0acbcc 122
mbed_official 219:993c9b0acbcc 123 // Save informations for future use
mbed_official 219:993c9b0acbcc 124 obj->irq_n = irq_n;
mbed_official 219:993c9b0acbcc 125 obj->irq_index = irq_index;
mbed_official 219:993c9b0acbcc 126 obj->event = EDGE_NONE;
mbed_official 219:993c9b0acbcc 127 obj->pin = pin;
mbed_official 219:993c9b0acbcc 128 channel_ids[irq_index] = id;
mbed_official 219:993c9b0acbcc 129 channel_gpio[irq_index] = gpio_add;
mbed_official 219:993c9b0acbcc 130 channel_pin[irq_index] = pin_index;
mbed_official 219:993c9b0acbcc 131
mbed_official 219:993c9b0acbcc 132 irq_handler = handler;
mbed_official 219:993c9b0acbcc 133
mbed_official 219:993c9b0acbcc 134 return 0;
mbed_official 219:993c9b0acbcc 135 }
mbed_official 219:993c9b0acbcc 136
mbed_official 219:993c9b0acbcc 137 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 219:993c9b0acbcc 138 channel_ids[obj->irq_index] = 0;
mbed_official 219:993c9b0acbcc 139 channel_gpio[obj->irq_index] = 0;
mbed_official 219:993c9b0acbcc 140 channel_pin[obj->irq_index] = 0;
mbed_official 219:993c9b0acbcc 141 // Disable EXTI line
mbed_official 219:993c9b0acbcc 142 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 143 obj->event = EDGE_NONE;
mbed_official 219:993c9b0acbcc 144 }
mbed_official 219:993c9b0acbcc 145
mbed_official 219:993c9b0acbcc 146 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 219:993c9b0acbcc 147 uint32_t mode = STM_MODE_INPUT;
mbed_official 219:993c9b0acbcc 148 uint32_t pull = GPIO_NOPULL;
mbed_official 219:993c9b0acbcc 149
mbed_official 219:993c9b0acbcc 150 if (enable) {
mbed_official 219:993c9b0acbcc 151
mbed_official 219:993c9b0acbcc 152 pull = GPIO_NOPULL;
mbed_official 219:993c9b0acbcc 153
mbed_official 219:993c9b0acbcc 154 if (event == IRQ_RISE) {
mbed_official 219:993c9b0acbcc 155 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 219:993c9b0acbcc 156 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 219:993c9b0acbcc 157 obj->event = EDGE_BOTH;
mbed_official 219:993c9b0acbcc 158 } else { // NONE or RISE
mbed_official 219:993c9b0acbcc 159 mode = STM_MODE_IT_RISING;
mbed_official 219:993c9b0acbcc 160 obj->event = EDGE_RISE;
mbed_official 219:993c9b0acbcc 161 }
mbed_official 219:993c9b0acbcc 162 }
mbed_official 219:993c9b0acbcc 163
mbed_official 219:993c9b0acbcc 164 if (event == IRQ_FALL) {
mbed_official 219:993c9b0acbcc 165 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 219:993c9b0acbcc 166 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 219:993c9b0acbcc 167 obj->event = EDGE_BOTH;
mbed_official 219:993c9b0acbcc 168 } else { // NONE or FALL
mbed_official 219:993c9b0acbcc 169 mode = STM_MODE_IT_FALLING;
mbed_official 219:993c9b0acbcc 170 obj->event = EDGE_FALL;
mbed_official 219:993c9b0acbcc 171 }
mbed_official 219:993c9b0acbcc 172 }
mbed_official 219:993c9b0acbcc 173 } else {
mbed_official 219:993c9b0acbcc 174 mode = STM_MODE_INPUT;
mbed_official 219:993c9b0acbcc 175 pull = GPIO_NOPULL;
mbed_official 219:993c9b0acbcc 176 obj->event = EDGE_NONE;
mbed_official 219:993c9b0acbcc 177 }
mbed_official 219:993c9b0acbcc 178
mbed_official 219:993c9b0acbcc 179 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 219:993c9b0acbcc 180 }
mbed_official 219:993c9b0acbcc 181
mbed_official 219:993c9b0acbcc 182 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 219:993c9b0acbcc 183 NVIC_EnableIRQ(obj->irq_n);
mbed_official 219:993c9b0acbcc 184 }
mbed_official 219:993c9b0acbcc 185
mbed_official 219:993c9b0acbcc 186 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 219:993c9b0acbcc 187 NVIC_DisableIRQ(obj->irq_n);
mbed_official 219:993c9b0acbcc 188 obj->event = EDGE_NONE;
mbed_official 219:993c9b0acbcc 189 }