配置STM32 中断引脚 -- DWM1000 IRQ 【STM32 基础知识】 - 51uwb.cn

#define DECAIRQ GPIO_Pin_0
#define DECAIRQ_GPIO GPIOB
#define DECAIRQ_EXTI EXTI_Line0
#define DECAIRQ_EXTI_PORT GPIO_PortSourceGPIOB
#define DECAIRQ_EXTI_PIN GPIO_PinSource0
#define DECAIRQ_EXTI_IRQn EXTI0_IRQn
#define DECAIRQ_EXTI_USEIRQ ENABLE
#define DECAIRQ_EXTI_NOIRQ DISABLE

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void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(DECAIRQ_EXTI)!= RESET)
{
EXTI_ClearITPendingBit(DECAIRQ_EXTI);
led_on(LED_ALL);
}
}

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int NVIC_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// Enable GPIO used as DECA IRQ for interrupt
GPIO_InitStructure.GPIO_Pin = DECAIRQ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //IRQ pin should be Pull Down to prevent unnecessary EXT IRQ while DW1000 goes to sleep mode
GPIO_Init(DECAIRQ_GPIO, &GPIO_InitStructure);
/* Connect EXTI Line to GPIO Pin */
GPIO_EXTILineConfig(DECAIRQ_EXTI_PORT, DECAIRQ_EXTI_PIN);
/* Configure EXTI line */
EXTI_InitStructure.EXTI_Line = DECAIRQ_EXTI;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //MPW3 IRQ polarity is high by default
EXTI_InitStructure.EXTI_LineCmd = DECAIRQ_EXTI_USEIRQ;
EXTI_Init(&EXTI_InitStructure);
/* Set NVIC Grouping to 16 groups of interrupt without sub-grouping */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Enable and set EXTI Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = DECAIRQ_EXTI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = DECAIRQ_EXTI_USEIRQ;
NVIC_Init(&NVIC_InitStructure);
/* Enable the RTC Interrupt */
//NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 10;
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//NVIC_Init(&NVIC_InitStructure);
return 0;
}

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void peripherals_init (void)
{
……
NVIC_Configuration();
//AT24C16_TEST();while(1);
}

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