关于STM32中CAN中断的使用

“如果你用的CAN引脚是PA11和PA12，接收中断用CAN1_RX0_IRQn。如果CAN引脚用的是PB8和PB9，也就是用重定义的引脚，接收中断用CAN1_RX1_IRQn。由于PA11和PA12也是USB的引脚，所以非互联型且带CAN控制器的微控制器的库文件在起名字时用了USB_LP_CAN1_RX0_IRQn。”具体的定义可以参考stm32F10x.h文件，其中对不同型号的中断有具体的定义。

示例如下：

1. 配置过滤器

CAN_FilterInitStructure.CAN_FilterNumber = 0;

CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;

CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;

CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;

CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;

CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;

CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;//关联FIFO0

CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;

CAN_FilterInit(&CAN_FilterInitStructure);

CAN_FilterInitStructure.CAN_FilterNumber = 14;

CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO1;//关联FIFO1

CAN_FilterInit(&CAN_FilterInitStructure);

2. 开启CAN中断

CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);

CAN_ITConfig(CAN1, CAN_IT_FMP1, ENABLE);

CAN_ITConfig(CAN2, CAN_IT_FMP0, ENABLE);

CAN_ITConfig(CAN2, CAN_IT_FMP1, ENABLE);

3. 中断处理函数

void CAN1_RX0_IRQHandler(void)

{
CAN_Receive(CAN1, CAN_FIFO0, &CAN1_RxMsg);

//
}

void CAN1_RX1_IRQHandler(void)

{
CAN_Receive(CAN1, CAN_FIFO1, &CAN1_RxMsg);

//
}

void CAN2_RX0_IRQHandler(void)

{

CAN_Receive(CAN2, CAN_FIFO0, &CAN2_RxMsg);
//
}

void CAN2_RX1_IRQHandler(void)

{
CAN_Receive(CAN2, CAN_FIFO1, &CAN2_RxMsg);
//
}