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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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@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 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 251:de9a1e4ffd79 34 #include "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 }