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mbed SDK library sources

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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_F030R8/gpio_irq_api.c@84:f54042cbc282, 2014-02-03 (annotated)

Committer:
mbed_official
Date:
Mon Feb 03 09:30:05 2014 +0000
Revision:
84:f54042cbc282
Parent:
77:b5886236e6f0 
Synchronized with git revision bbbd8699601c42149ccf0c37bc42bb6856ccc4c6



Full URL: https://github.com/mbedmicro/mbed/commit/bbbd8699601c42149ccf0c37bc42bb6856ccc4c6/



[NUCLEO_L152RE/F030_R8] SPI, I2C, Ticker, PWM updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 77:b5886236e6f0 1 /* mbed Microcontroller Library
mbed_official 77:b5886236e6f0 2 *******************************************************************************
mbed_official 77:b5886236e6f0 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 77:b5886236e6f0 4 * All rights reserved.
mbed_official 77:b5886236e6f0 5 *
mbed_official 77:b5886236e6f0 6 * Redistribution and use in source and binary forms, with or without
mbed_official 77:b5886236e6f0 7 * modification, are permitted provided that the following conditions are met:
mbed_official 77:b5886236e6f0 8 *
mbed_official 77:b5886236e6f0 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 77:b5886236e6f0 10 * this list of conditions and the following disclaimer.
mbed_official 77:b5886236e6f0 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 77:b5886236e6f0 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 77:b5886236e6f0 13 * and/or other materials provided with the distribution.
mbed_official 77:b5886236e6f0 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 77:b5886236e6f0 15 * may be used to endorse or promote products derived from this software
mbed_official 77:b5886236e6f0 16 * without specific prior written permission.
mbed_official 77:b5886236e6f0 17 *
mbed_official 77:b5886236e6f0 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 77:b5886236e6f0 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 77:b5886236e6f0 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 77:b5886236e6f0 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 77:b5886236e6f0 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 77:b5886236e6f0 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 77:b5886236e6f0 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 77:b5886236e6f0 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 77:b5886236e6f0 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 77:b5886236e6f0 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 77:b5886236e6f0 28 *******************************************************************************
mbed_official 77:b5886236e6f0 29 */
mbed_official 77:b5886236e6f0 30 #include <stddef.h>
mbed_official 77:b5886236e6f0 31 #include "cmsis.h"
mbed_official 77:b5886236e6f0 32
mbed_official 77:b5886236e6f0 33 #include "gpio_irq_api.h"
mbed_official 77:b5886236e6f0 34 #include "pinmap.h"
mbed_official 77:b5886236e6f0 35 #include "error.h"
mbed_official 77:b5886236e6f0 36
mbed_official 77:b5886236e6f0 37 #define EDGE_NONE (0)
mbed_official 77:b5886236e6f0 38 #define EDGE_RISE (1)
mbed_official 77:b5886236e6f0 39 #define EDGE_FALL (2)
mbed_official 77:b5886236e6f0 40 #define EDGE_BOTH (3)
mbed_official 77:b5886236e6f0 41
mbed_official 77:b5886236e6f0 42 #define CHANNEL_NUM (3)
mbed_official 77:b5886236e6f0 43
mbed_official 77:b5886236e6f0 44 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0};
mbed_official 77:b5886236e6f0 45 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0};
mbed_official 77:b5886236e6f0 46 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0};
mbed_official 77:b5886236e6f0 47
mbed_official 77:b5886236e6f0 48 static gpio_irq_handler irq_handler;
mbed_official 77:b5886236e6f0 49
mbed_official 77:b5886236e6f0 50 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 77:b5886236e6f0 51 // Retrieve the gpio and pin that generate the irq
mbed_official 77:b5886236e6f0 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 77:b5886236e6f0 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 77:b5886236e6f0 54
mbed_official 77:b5886236e6f0 55 // Clear interrupt flag
mbed_official 77:b5886236e6f0 56 if (EXTI_GetITStatus(pin) != RESET)
mbed_official 77:b5886236e6f0 57 {
mbed_official 77:b5886236e6f0 58 EXTI_ClearITPendingBit(pin);
mbed_official 77:b5886236e6f0 59 }
mbed_official 77:b5886236e6f0 60
mbed_official 77:b5886236e6f0 61 if (channel_ids[irq_index] == 0) return;
mbed_official 77:b5886236e6f0 62
mbed_official 77:b5886236e6f0 63 // Check which edge has generated the irq
mbed_official 77:b5886236e6f0 64 if ((gpio->IDR & pin) == 0) {
mbed_official 77:b5886236e6f0 65 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 77:b5886236e6f0 66 }
mbed_official 77:b5886236e6f0 67 else {
mbed_official 77:b5886236e6f0 68 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 77:b5886236e6f0 69 }
mbed_official 77:b5886236e6f0 70 }
mbed_official 77:b5886236e6f0 71
mbed_official 77:b5886236e6f0 72 // The irq_index is passed to the function
mbed_official 77:b5886236e6f0 73 static void gpio_irq0(void) {handle_interrupt_in(0);}
mbed_official 77:b5886236e6f0 74 static void gpio_irq1(void) {handle_interrupt_in(1);}
mbed_official 77:b5886236e6f0 75 static void gpio_irq2(void) {handle_interrupt_in(2);}
mbed_official 77:b5886236e6f0 76
mbed_official 77:b5886236e6f0 77 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 77:b5886236e6f0 78
mbed_official 77:b5886236e6f0 79 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 77:b5886236e6f0 80 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 77:b5886236e6f0 81 uint32_t vector = 0;
mbed_official 77:b5886236e6f0 82 uint32_t irq_index;
mbed_official 77:b5886236e6f0 83
mbed_official 77:b5886236e6f0 84 if (pin == NC) return -1;
mbed_official 77:b5886236e6f0 85
mbed_official 77:b5886236e6f0 86 uint32_t port_index = STM_PORT(pin);
mbed_official 77:b5886236e6f0 87 uint32_t pin_index = STM_PIN(pin);
mbed_official 77:b5886236e6f0 88
mbed_official 77:b5886236e6f0 89 // Select irq number and interrupt routine
mbed_official 77:b5886236e6f0 90 switch (pin) {
mbed_official 77:b5886236e6f0 91 case PC_13: // User button
mbed_official 77:b5886236e6f0 92 irq_n = EXTI4_15_IRQn;
mbed_official 77:b5886236e6f0 93 vector = (uint32_t)&gpio_irq0;
mbed_official 77:b5886236e6f0 94 irq_index = 0;
mbed_official 77:b5886236e6f0 95 break;
mbed_official 77:b5886236e6f0 96 case PA_0:
mbed_official 77:b5886236e6f0 97 irq_n = EXTI0_1_IRQn;
mbed_official 77:b5886236e6f0 98 vector = (uint32_t)&gpio_irq1;
mbed_official 77:b5886236e6f0 99 irq_index = 1;
mbed_official 77:b5886236e6f0 100 break;
mbed_official 77:b5886236e6f0 101 case PB_3:
mbed_official 77:b5886236e6f0 102 irq_n = EXTI2_3_IRQn;
mbed_official 77:b5886236e6f0 103 vector = (uint32_t)&gpio_irq2;
mbed_official 77:b5886236e6f0 104 irq_index = 2;
mbed_official 77:b5886236e6f0 105 break;
mbed_official 77:b5886236e6f0 106 default:
mbed_official 77:b5886236e6f0 107 error("This pin is not supported\n");
mbed_official 77:b5886236e6f0 108 return -1;
mbed_official 77:b5886236e6f0 109 }
mbed_official 77:b5886236e6f0 110
mbed_official 77:b5886236e6f0 111 // Enable GPIO clock
mbed_official 77:b5886236e6f0 112 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 77:b5886236e6f0 113
mbed_official 77:b5886236e6f0 114 // Enable SYSCFG clock
mbed_official 77:b5886236e6f0 115 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 77:b5886236e6f0 116
mbed_official 77:b5886236e6f0 117 // Connect EXTI line to pin
mbed_official 77:b5886236e6f0 118 SYSCFG_EXTILineConfig(port_index, pin_index);
mbed_official 77:b5886236e6f0 119
mbed_official 77:b5886236e6f0 120 // Configure EXTI line
mbed_official 77:b5886236e6f0 121 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 122 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 77:b5886236e6f0 123 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 77:b5886236e6f0 124 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 77:b5886236e6f0 125 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 77:b5886236e6f0 126 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 127
mbed_official 77:b5886236e6f0 128 // Enable and set EXTI interrupt to the lowest priority
mbed_official 77:b5886236e6f0 129 NVIC_InitTypeDef NVIC_InitStructure;
mbed_official 77:b5886236e6f0 130 NVIC_InitStructure.NVIC_IRQChannel = irq_n;
mbed_official 77:b5886236e6f0 131 NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
mbed_official 77:b5886236e6f0 132 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
mbed_official 77:b5886236e6f0 133 NVIC_Init(&NVIC_InitStructure);
mbed_official 77:b5886236e6f0 134
mbed_official 77:b5886236e6f0 135 NVIC_SetVector(irq_n, vector);
mbed_official 77:b5886236e6f0 136 NVIC_EnableIRQ(irq_n);
mbed_official 77:b5886236e6f0 137
mbed_official 77:b5886236e6f0 138 // Save informations for future use
mbed_official 77:b5886236e6f0 139 obj->irq_n = irq_n;
mbed_official 77:b5886236e6f0 140 obj->irq_index = irq_index;
mbed_official 77:b5886236e6f0 141 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 142 channel_ids[irq_index] = id;
mbed_official 77:b5886236e6f0 143 channel_gpio[irq_index] = gpio_add;
mbed_official 77:b5886236e6f0 144 channel_pin[irq_index] = pin_index;
mbed_official 77:b5886236e6f0 145
mbed_official 77:b5886236e6f0 146 irq_handler = handler;
mbed_official 77:b5886236e6f0 147
mbed_official 77:b5886236e6f0 148 return 0;
mbed_official 77:b5886236e6f0 149 }
mbed_official 77:b5886236e6f0 150
mbed_official 77:b5886236e6f0 151 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 152 channel_ids[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 153 channel_gpio[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 154 channel_pin[obj->irq_index] = 0;
mbed_official 77:b5886236e6f0 155 // Disable EXTI line
mbed_official 77:b5886236e6f0 156 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 157 EXTI_StructInit(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 158 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 159 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 160 }
mbed_official 77:b5886236e6f0 161
mbed_official 77:b5886236e6f0 162 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 77:b5886236e6f0 163 EXTI_InitTypeDef EXTI_InitStructure;
mbed_official 77:b5886236e6f0 164
mbed_official 77:b5886236e6f0 165 uint32_t pin_index = channel_pin[obj->irq_index];
mbed_official 77:b5886236e6f0 166
mbed_official 77:b5886236e6f0 167 EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index);
mbed_official 77:b5886236e6f0 168 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 77:b5886236e6f0 169
mbed_official 77:b5886236e6f0 170 if (event == IRQ_RISE) {
mbed_official 77:b5886236e6f0 171 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 77:b5886236e6f0 172 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 77:b5886236e6f0 173 obj->event = EDGE_BOTH;
mbed_official 77:b5886236e6f0 174 }
mbed_official 77:b5886236e6f0 175 else { // NONE or RISE
mbed_official 77:b5886236e6f0 176 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
mbed_official 77:b5886236e6f0 177 obj->event = EDGE_RISE;
mbed_official 77:b5886236e6f0 178 }
mbed_official 77:b5886236e6f0 179 }
mbed_official 77:b5886236e6f0 180
mbed_official 77:b5886236e6f0 181 if (event == IRQ_FALL) {
mbed_official 77:b5886236e6f0 182 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 77:b5886236e6f0 183 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 77:b5886236e6f0 184 obj->event = EDGE_BOTH;
mbed_official 77:b5886236e6f0 185 }
mbed_official 77:b5886236e6f0 186 else { // NONE or FALL
mbed_official 77:b5886236e6f0 187 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 77:b5886236e6f0 188 obj->event = EDGE_FALL;
mbed_official 77:b5886236e6f0 189 }
mbed_official 77:b5886236e6f0 190 }
mbed_official 77:b5886236e6f0 191
mbed_official 77:b5886236e6f0 192 if (enable) {
mbed_official 77:b5886236e6f0 193 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
mbed_official 77:b5886236e6f0 194 }
mbed_official 77:b5886236e6f0 195 else {
mbed_official 77:b5886236e6f0 196 EXTI_InitStructure.EXTI_LineCmd = DISABLE;
mbed_official 77:b5886236e6f0 197 }
mbed_official 77:b5886236e6f0 198
mbed_official 77:b5886236e6f0 199 EXTI_Init(&EXTI_InitStructure);
mbed_official 77:b5886236e6f0 200 }
mbed_official 77:b5886236e6f0 201
mbed_official 77:b5886236e6f0 202 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 203 NVIC_EnableIRQ(obj->irq_n);
mbed_official 77:b5886236e6f0 204 }
mbed_official 77:b5886236e6f0 205
mbed_official 77:b5886236e6f0 206 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 77:b5886236e6f0 207 NVIC_DisableIRQ(obj->irq_n);
mbed_official 77:b5886236e6f0 208 obj->event = EDGE_NONE;
mbed_official 77:b5886236e6f0 209 }