shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

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targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/gpio_irq_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
285:31249416b6f9 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 4 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 5 *
mbed_official 181:a4cbdfbbd2f4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 8 *
mbed_official 181:a4cbdfbbd2f4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 10 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 13 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 15 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 16 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 17 *
mbed_official 181:a4cbdfbbd2f4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 28 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 29 */
mbed_official 181:a4cbdfbbd2f4 30 #include <stddef.h>
mbed_official 181:a4cbdfbbd2f4 31 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 32 #include "gpio_irq_api.h"
mbed_official 181:a4cbdfbbd2f4 33 #include "pinmap.h"
mbed_official 285:31249416b6f9 34 #include "mbed_error.h"
mbed_official 181:a4cbdfbbd2f4 35
mbed_official 181:a4cbdfbbd2f4 36 #define EDGE_NONE (0)
mbed_official 181:a4cbdfbbd2f4 37 #define EDGE_RISE (1)
mbed_official 181:a4cbdfbbd2f4 38 #define EDGE_FALL (2)
mbed_official 181:a4cbdfbbd2f4 39 #define EDGE_BOTH (3)
mbed_official 181:a4cbdfbbd2f4 40
mbed_official 181:a4cbdfbbd2f4 41 #define CHANNEL_NUM (3)
mbed_official 181:a4cbdfbbd2f4 42
mbed_official 181:a4cbdfbbd2f4 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0};
mbed_official 181:a4cbdfbbd2f4 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0};
mbed_official 181:a4cbdfbbd2f4 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0};
mbed_official 181:a4cbdfbbd2f4 46
mbed_official 181:a4cbdfbbd2f4 47 static gpio_irq_handler irq_handler;
mbed_official 181:a4cbdfbbd2f4 48
mbed_official 181:a4cbdfbbd2f4 49 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 181:a4cbdfbbd2f4 50 // Retrieve the gpio and pin that generate the irq
mbed_official 181:a4cbdfbbd2f4 51 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 181:a4cbdfbbd2f4 52 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 181:a4cbdfbbd2f4 53
mbed_official 181:a4cbdfbbd2f4 54 // Clear interrupt flag
mbed_official 181:a4cbdfbbd2f4 55 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 181:a4cbdfbbd2f4 56 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 181:a4cbdfbbd2f4 57 }
mbed_official 181:a4cbdfbbd2f4 58
mbed_official 181:a4cbdfbbd2f4 59 if (channel_ids[irq_index] == 0) return;
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 181:a4cbdfbbd2f4 61 // Check which edge has generated the irq
mbed_official 181:a4cbdfbbd2f4 62 if ((gpio->IDR & pin) == 0) {
mbed_official 181:a4cbdfbbd2f4 63 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 181:a4cbdfbbd2f4 64 } else {
mbed_official 181:a4cbdfbbd2f4 65 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 181:a4cbdfbbd2f4 66 }
mbed_official 181:a4cbdfbbd2f4 67 }
mbed_official 181:a4cbdfbbd2f4 68
mbed_official 181:a4cbdfbbd2f4 69 // The irq_index is passed to the function
mbed_official 181:a4cbdfbbd2f4 70 // EXTI lines 0 to 1
mbed_official 181:a4cbdfbbd2f4 71 static void gpio_irq0(void) {
mbed_official 181:a4cbdfbbd2f4 72 handle_interrupt_in(0);
mbed_official 181:a4cbdfbbd2f4 73 }
mbed_official 181:a4cbdfbbd2f4 74 // EXTI lines 2 to 3
mbed_official 181:a4cbdfbbd2f4 75 static void gpio_irq1(void) {
mbed_official 181:a4cbdfbbd2f4 76 handle_interrupt_in(1);
mbed_official 181:a4cbdfbbd2f4 77 }
mbed_official 181:a4cbdfbbd2f4 78 // EXTI lines 4 to 15
mbed_official 181:a4cbdfbbd2f4 79 static void gpio_irq2(void) {
mbed_official 181:a4cbdfbbd2f4 80 handle_interrupt_in(2);
mbed_official 181:a4cbdfbbd2f4 81 }
mbed_official 181:a4cbdfbbd2f4 82
mbed_official 181:a4cbdfbbd2f4 83 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 181:a4cbdfbbd2f4 84
mbed_official 181:a4cbdfbbd2f4 85 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 181:a4cbdfbbd2f4 86 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 181:a4cbdfbbd2f4 87 uint32_t vector = 0;
mbed_official 181:a4cbdfbbd2f4 88 uint32_t irq_index;
mbed_official 181:a4cbdfbbd2f4 89
mbed_official 181:a4cbdfbbd2f4 90 if (pin == NC) return -1;
mbed_official 181:a4cbdfbbd2f4 91
mbed_official 181:a4cbdfbbd2f4 92 uint32_t port_index = STM_PORT(pin);
mbed_official 181:a4cbdfbbd2f4 93 uint32_t pin_index = STM_PIN(pin);
mbed_official 181:a4cbdfbbd2f4 94
mbed_official 181:a4cbdfbbd2f4 95 // Select irq number and interrupt routine
mbed_official 181:a4cbdfbbd2f4 96 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 181:a4cbdfbbd2f4 97 irq_n = EXTI0_1_IRQn;
mbed_official 181:a4cbdfbbd2f4 98 vector = (uint32_t)&gpio_irq0;
mbed_official 181:a4cbdfbbd2f4 99 irq_index = 0;
mbed_official 181:a4cbdfbbd2f4 100 } else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 181:a4cbdfbbd2f4 101 irq_n = EXTI2_3_IRQn;
mbed_official 181:a4cbdfbbd2f4 102 vector = (uint32_t)&gpio_irq1;
mbed_official 181:a4cbdfbbd2f4 103 irq_index = 1;
mbed_official 181:a4cbdfbbd2f4 104 } else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 181:a4cbdfbbd2f4 105 irq_n = EXTI4_15_IRQn;
mbed_official 181:a4cbdfbbd2f4 106 vector = (uint32_t)&gpio_irq2;
mbed_official 181:a4cbdfbbd2f4 107 irq_index = 2;
mbed_official 181:a4cbdfbbd2f4 108 } else {
mbed_official 181:a4cbdfbbd2f4 109 error("InterruptIn error: pin not supported.\n");
mbed_official 181:a4cbdfbbd2f4 110 return -1;
mbed_official 181:a4cbdfbbd2f4 111 }
mbed_official 181:a4cbdfbbd2f4 112
mbed_official 181:a4cbdfbbd2f4 113 // Enable GPIO clock
mbed_official 181:a4cbdfbbd2f4 114 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 181:a4cbdfbbd2f4 115
mbed_official 181:a4cbdfbbd2f4 116 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 117 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 118
mbed_official 181:a4cbdfbbd2f4 119 // Enable EXTI interrupt
mbed_official 181:a4cbdfbbd2f4 120 NVIC_SetVector(irq_n, vector);
mbed_official 181:a4cbdfbbd2f4 121 NVIC_EnableIRQ(irq_n);
mbed_official 181:a4cbdfbbd2f4 122
mbed_official 181:a4cbdfbbd2f4 123 // Save informations for future use
mbed_official 181:a4cbdfbbd2f4 124 obj->irq_n = irq_n;
mbed_official 181:a4cbdfbbd2f4 125 obj->irq_index = irq_index;
mbed_official 181:a4cbdfbbd2f4 126 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 127 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 128 channel_ids[irq_index] = id;
mbed_official 181:a4cbdfbbd2f4 129 channel_gpio[irq_index] = gpio_add;
mbed_official 181:a4cbdfbbd2f4 130 channel_pin[irq_index] = pin_index;
mbed_official 181:a4cbdfbbd2f4 131
mbed_official 181:a4cbdfbbd2f4 132 irq_handler = handler;
mbed_official 181:a4cbdfbbd2f4 133
mbed_official 181:a4cbdfbbd2f4 134 return 0;
mbed_official 181:a4cbdfbbd2f4 135 }
mbed_official 181:a4cbdfbbd2f4 136
mbed_official 181:a4cbdfbbd2f4 137 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 181:a4cbdfbbd2f4 138 channel_ids[obj->irq_index] = 0;
mbed_official 181:a4cbdfbbd2f4 139 channel_gpio[obj->irq_index] = 0;
mbed_official 181:a4cbdfbbd2f4 140 channel_pin[obj->irq_index] = 0;
mbed_official 181:a4cbdfbbd2f4 141 // Disable EXTI line
mbed_official 181:a4cbdfbbd2f4 142 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 143 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 144 }
mbed_official 181:a4cbdfbbd2f4 145
mbed_official 181:a4cbdfbbd2f4 146 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 181:a4cbdfbbd2f4 147 uint32_t mode = STM_MODE_INPUT;
mbed_official 181:a4cbdfbbd2f4 148 uint32_t pull = GPIO_NOPULL;
mbed_official 181:a4cbdfbbd2f4 149
mbed_official 181:a4cbdfbbd2f4 150 if (enable) {
mbed_official 181:a4cbdfbbd2f4 151
mbed_official 181:a4cbdfbbd2f4 152 pull = GPIO_NOPULL;
mbed_official 181:a4cbdfbbd2f4 153
mbed_official 181:a4cbdfbbd2f4 154 if (event == IRQ_RISE) {
mbed_official 181:a4cbdfbbd2f4 155 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 181:a4cbdfbbd2f4 156 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 181:a4cbdfbbd2f4 157 obj->event = EDGE_BOTH;
mbed_official 181:a4cbdfbbd2f4 158 } else { // NONE or RISE
mbed_official 181:a4cbdfbbd2f4 159 mode = STM_MODE_IT_RISING;
mbed_official 181:a4cbdfbbd2f4 160 obj->event = EDGE_RISE;
mbed_official 181:a4cbdfbbd2f4 161 }
mbed_official 181:a4cbdfbbd2f4 162 }
mbed_official 181:a4cbdfbbd2f4 163
mbed_official 181:a4cbdfbbd2f4 164 if (event == IRQ_FALL) {
mbed_official 181:a4cbdfbbd2f4 165 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 181:a4cbdfbbd2f4 166 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 181:a4cbdfbbd2f4 167 obj->event = EDGE_BOTH;
mbed_official 181:a4cbdfbbd2f4 168 } else { // NONE or FALL
mbed_official 181:a4cbdfbbd2f4 169 mode = STM_MODE_IT_FALLING;
mbed_official 181:a4cbdfbbd2f4 170 obj->event = EDGE_FALL;
mbed_official 181:a4cbdfbbd2f4 171 }
mbed_official 181:a4cbdfbbd2f4 172 }
mbed_official 181:a4cbdfbbd2f4 173 } else {
mbed_official 181:a4cbdfbbd2f4 174 mode = STM_MODE_INPUT;
mbed_official 181:a4cbdfbbd2f4 175 pull = GPIO_NOPULL;
mbed_official 181:a4cbdfbbd2f4 176 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 177 }
mbed_official 181:a4cbdfbbd2f4 178
mbed_official 181:a4cbdfbbd2f4 179 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 181:a4cbdfbbd2f4 180 }
mbed_official 181:a4cbdfbbd2f4 181
mbed_official 181:a4cbdfbbd2f4 182 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 181:a4cbdfbbd2f4 183 NVIC_EnableIRQ(obj->irq_n);
mbed_official 181:a4cbdfbbd2f4 184 }
mbed_official 181:a4cbdfbbd2f4 185
mbed_official 181:a4cbdfbbd2f4 186 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 181:a4cbdfbbd2f4 187 NVIC_DisableIRQ(obj->irq_n);
mbed_official 181:a4cbdfbbd2f4 188 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 189 }