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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_NUCLEO_L053R8/gpio_irq_api.c@402:09075a3b15e3, 2014-11-14 (annotated)

Committer:
mbed_official
Date:
Fri Nov 14 09:00:07 2014 +0000
Revision:
402:09075a3b15e3
Parent:
331:098575c6d2c8
Child:
413:ee28a0bed4ad
Synchronized with git revision dffeedc96e731e30785ca4a7842fb9769412bea1



Full URL: https://github.com/mbedmicro/mbed/commit/dffeedc96e731e30785ca4a7842fb9769412bea1/



Targets: add USBTX and USBRX pin definitions for targets that don't provide them

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 402:09075a3b15e3 49 static void handle_interrupt_in(uint32_t irq_index)
mbed_official 402:09075a3b15e3 50 {
mbed_official 181:a4cbdfbbd2f4 51 // Retrieve the gpio and pin that generate the irq
mbed_official 181:a4cbdfbbd2f4 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 181:a4cbdfbbd2f4 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 181:a4cbdfbbd2f4 54
mbed_official 181:a4cbdfbbd2f4 55 // Clear interrupt flag
mbed_official 181:a4cbdfbbd2f4 56 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 181:a4cbdfbbd2f4 57 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 181:a4cbdfbbd2f4 58 }
mbed_official 181:a4cbdfbbd2f4 59
mbed_official 181:a4cbdfbbd2f4 60 if (channel_ids[irq_index] == 0) return;
mbed_official 181:a4cbdfbbd2f4 61
mbed_official 181:a4cbdfbbd2f4 62 // Check which edge has generated the irq
mbed_official 181:a4cbdfbbd2f4 63 if ((gpio->IDR & pin) == 0) {
mbed_official 181:a4cbdfbbd2f4 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 181:a4cbdfbbd2f4 65 } else {
mbed_official 181:a4cbdfbbd2f4 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 181:a4cbdfbbd2f4 67 }
mbed_official 181:a4cbdfbbd2f4 68 }
mbed_official 181:a4cbdfbbd2f4 69
mbed_official 181:a4cbdfbbd2f4 70 // The irq_index is passed to the function
mbed_official 181:a4cbdfbbd2f4 71 // EXTI lines 0 to 1
mbed_official 402:09075a3b15e3 72 static void gpio_irq0(void)
mbed_official 402:09075a3b15e3 73 {
mbed_official 181:a4cbdfbbd2f4 74 handle_interrupt_in(0);
mbed_official 181:a4cbdfbbd2f4 75 }
mbed_official 181:a4cbdfbbd2f4 76 // EXTI lines 2 to 3
mbed_official 402:09075a3b15e3 77 static void gpio_irq1(void)
mbed_official 402:09075a3b15e3 78 {
mbed_official 181:a4cbdfbbd2f4 79 handle_interrupt_in(1);
mbed_official 181:a4cbdfbbd2f4 80 }
mbed_official 181:a4cbdfbbd2f4 81 // EXTI lines 4 to 15
mbed_official 402:09075a3b15e3 82 static void gpio_irq2(void)
mbed_official 402:09075a3b15e3 83 {
mbed_official 181:a4cbdfbbd2f4 84 handle_interrupt_in(2);
mbed_official 181:a4cbdfbbd2f4 85 }
mbed_official 181:a4cbdfbbd2f4 86
mbed_official 181:a4cbdfbbd2f4 87 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 181:a4cbdfbbd2f4 88
mbed_official 402:09075a3b15e3 89 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 402:09075a3b15e3 90 {
mbed_official 181:a4cbdfbbd2f4 91 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 181:a4cbdfbbd2f4 92 uint32_t vector = 0;
mbed_official 181:a4cbdfbbd2f4 93 uint32_t irq_index;
mbed_official 181:a4cbdfbbd2f4 94
mbed_official 181:a4cbdfbbd2f4 95 if (pin == NC) return -1;
mbed_official 181:a4cbdfbbd2f4 96
mbed_official 181:a4cbdfbbd2f4 97 uint32_t port_index = STM_PORT(pin);
mbed_official 181:a4cbdfbbd2f4 98 uint32_t pin_index = STM_PIN(pin);
mbed_official 181:a4cbdfbbd2f4 99
mbed_official 181:a4cbdfbbd2f4 100 // Select irq number and interrupt routine
mbed_official 181:a4cbdfbbd2f4 101 if ((pin_index == 0) || (pin_index == 1)) {
mbed_official 181:a4cbdfbbd2f4 102 irq_n = EXTI0_1_IRQn;
mbed_official 181:a4cbdfbbd2f4 103 vector = (uint32_t)&gpio_irq0;
mbed_official 181:a4cbdfbbd2f4 104 irq_index = 0;
mbed_official 181:a4cbdfbbd2f4 105 } else if ((pin_index == 2) || (pin_index == 3)) {
mbed_official 181:a4cbdfbbd2f4 106 irq_n = EXTI2_3_IRQn;
mbed_official 181:a4cbdfbbd2f4 107 vector = (uint32_t)&gpio_irq1;
mbed_official 181:a4cbdfbbd2f4 108 irq_index = 1;
mbed_official 181:a4cbdfbbd2f4 109 } else if ((pin_index > 3) && (pin_index < 16)) {
mbed_official 181:a4cbdfbbd2f4 110 irq_n = EXTI4_15_IRQn;
mbed_official 181:a4cbdfbbd2f4 111 vector = (uint32_t)&gpio_irq2;
mbed_official 181:a4cbdfbbd2f4 112 irq_index = 2;
mbed_official 181:a4cbdfbbd2f4 113 } else {
mbed_official 181:a4cbdfbbd2f4 114 error("InterruptIn error: pin not supported.\n");
mbed_official 181:a4cbdfbbd2f4 115 return -1;
mbed_official 181:a4cbdfbbd2f4 116 }
mbed_official 181:a4cbdfbbd2f4 117
mbed_official 181:a4cbdfbbd2f4 118 // Enable GPIO clock
mbed_official 181:a4cbdfbbd2f4 119 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 181:a4cbdfbbd2f4 120
mbed_official 181:a4cbdfbbd2f4 121 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 122 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 123
mbed_official 181:a4cbdfbbd2f4 124 // Enable EXTI interrupt
mbed_official 181:a4cbdfbbd2f4 125 NVIC_SetVector(irq_n, vector);
mbed_official 181:a4cbdfbbd2f4 126 NVIC_EnableIRQ(irq_n);
mbed_official 181:a4cbdfbbd2f4 127
mbed_official 181:a4cbdfbbd2f4 128 // Save informations for future use
mbed_official 181:a4cbdfbbd2f4 129 obj->irq_n = irq_n;
mbed_official 181:a4cbdfbbd2f4 130 obj->irq_index = irq_index;
mbed_official 181:a4cbdfbbd2f4 131 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 132 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 133 channel_ids[irq_index] = id;
mbed_official 181:a4cbdfbbd2f4 134 channel_gpio[irq_index] = gpio_add;
mbed_official 181:a4cbdfbbd2f4 135 channel_pin[irq_index] = pin_index;
mbed_official 181:a4cbdfbbd2f4 136
mbed_official 181:a4cbdfbbd2f4 137 irq_handler = handler;
mbed_official 181:a4cbdfbbd2f4 138
mbed_official 181:a4cbdfbbd2f4 139 return 0;
mbed_official 181:a4cbdfbbd2f4 140 }
mbed_official 181:a4cbdfbbd2f4 141
mbed_official 402:09075a3b15e3 142 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 402:09075a3b15e3 143 {
mbed_official 181:a4cbdfbbd2f4 144 channel_ids[obj->irq_index] = 0;
mbed_official 181:a4cbdfbbd2f4 145 channel_gpio[obj->irq_index] = 0;
mbed_official 181:a4cbdfbbd2f4 146 channel_pin[obj->irq_index] = 0;
mbed_official 181:a4cbdfbbd2f4 147 // Disable EXTI line
mbed_official 181:a4cbdfbbd2f4 148 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 149 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 150 }
mbed_official 181:a4cbdfbbd2f4 151
mbed_official 331:098575c6d2c8 152 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 331:098575c6d2c8 153 {
mbed_official 331:098575c6d2c8 154 uint32_t mode = STM_MODE_IT_EVT_RESET;
mbed_official 181:a4cbdfbbd2f4 155 uint32_t pull = GPIO_NOPULL;
mbed_official 181:a4cbdfbbd2f4 156
mbed_official 181:a4cbdfbbd2f4 157 if (enable) {
mbed_official 181:a4cbdfbbd2f4 158 if (event == IRQ_RISE) {
mbed_official 181:a4cbdfbbd2f4 159 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 181:a4cbdfbbd2f4 160 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 181:a4cbdfbbd2f4 161 obj->event = EDGE_BOTH;
mbed_official 181:a4cbdfbbd2f4 162 } else { // NONE or RISE
mbed_official 181:a4cbdfbbd2f4 163 mode = STM_MODE_IT_RISING;
mbed_official 181:a4cbdfbbd2f4 164 obj->event = EDGE_RISE;
mbed_official 181:a4cbdfbbd2f4 165 }
mbed_official 181:a4cbdfbbd2f4 166 }
mbed_official 181:a4cbdfbbd2f4 167 if (event == IRQ_FALL) {
mbed_official 181:a4cbdfbbd2f4 168 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 181:a4cbdfbbd2f4 169 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 181:a4cbdfbbd2f4 170 obj->event = EDGE_BOTH;
mbed_official 181:a4cbdfbbd2f4 171 } else { // NONE or FALL
mbed_official 181:a4cbdfbbd2f4 172 mode = STM_MODE_IT_FALLING;
mbed_official 181:a4cbdfbbd2f4 173 obj->event = EDGE_FALL;
mbed_official 181:a4cbdfbbd2f4 174 }
mbed_official 181:a4cbdfbbd2f4 175 }
mbed_official 331:098575c6d2c8 176 } else { // Disable
mbed_official 331:098575c6d2c8 177 if (event == IRQ_RISE) {
mbed_official 331:098575c6d2c8 178 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 331:098575c6d2c8 179 mode = STM_MODE_IT_FALLING;
mbed_official 331:098575c6d2c8 180 obj->event = EDGE_FALL;
mbed_official 331:098575c6d2c8 181 } else { // NONE or RISE
mbed_official 331:098575c6d2c8 182 mode = STM_MODE_IT_EVT_RESET;
mbed_official 331:098575c6d2c8 183 obj->event = EDGE_NONE;
mbed_official 331:098575c6d2c8 184 }
mbed_official 331:098575c6d2c8 185 }
mbed_official 331:098575c6d2c8 186 if (event == IRQ_FALL) {
mbed_official 331:098575c6d2c8 187 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 331:098575c6d2c8 188 mode = STM_MODE_IT_RISING;
mbed_official 331:098575c6d2c8 189 obj->event = EDGE_RISE;
mbed_official 331:098575c6d2c8 190 } else { // NONE or FALL
mbed_official 331:098575c6d2c8 191 mode = STM_MODE_IT_EVT_RESET;
mbed_official 331:098575c6d2c8 192 obj->event = EDGE_NONE;
mbed_official 331:098575c6d2c8 193 }
mbed_official 331:098575c6d2c8 194 }
mbed_official 181:a4cbdfbbd2f4 195 }
mbed_official 181:a4cbdfbbd2f4 196
mbed_official 181:a4cbdfbbd2f4 197 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 181:a4cbdfbbd2f4 198 }
mbed_official 181:a4cbdfbbd2f4 199
mbed_official 402:09075a3b15e3 200 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 402:09075a3b15e3 201 {
mbed_official 181:a4cbdfbbd2f4 202 NVIC_EnableIRQ(obj->irq_n);
mbed_official 181:a4cbdfbbd2f4 203 }
mbed_official 181:a4cbdfbbd2f4 204
mbed_official 402:09075a3b15e3 205 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 402:09075a3b15e3 206 {
mbed_official 181:a4cbdfbbd2f4 207 NVIC_DisableIRQ(obj->irq_n);
mbed_official 181:a4cbdfbbd2f4 208 obj->event = EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 209 }