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48 lines
1.4 KiB
48 lines
1.4 KiB
/*
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* ext_interrupt.c
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*
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* Created on: 3 Sep 2019
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* Author: maximilian
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*/
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#include "ext_interrupt.h"
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void initExtInt(void)
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{
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// Initialization structs
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GPIO_InitTypeDef exti_gpio;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
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//Additionally we need to initialize corresponding GPIOs
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exti_gpio.GPIO_Pin = GPIO_Pin_8;
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exti_gpio.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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exti_gpio.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOC, &exti_gpio);
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GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);
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EXTI_InitTypeDef EXTI_InitStructure;
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EXTI_InitStructure.EXTI_Line = EXTI_Line8;
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EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
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EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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EXTI_Init(&EXTI_InitStructure);
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NVIC_InitTypeDef NVIC_InitStructure;
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NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //Enable keypad external interrupt channel
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F; //Priority 2,
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; //Sub priority 2
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //Enable external interrupt channel
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NVIC_Init(&NVIC_InitStructure);
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osPrintf("Ext. int initialized.");
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}
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void EXTI9_5_IRQHandler(void)
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{
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osPrintf("Got interrupt.");
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if(EXTI_GetITStatus(EXTI_Line8) != RESET) {
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EXTI_ClearITPendingBit(EXTI_Line0);
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}
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}
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