STM32HAL库 CAN中断接收例程
时间: 2023-09-28 17:12:04 浏览: 179
下面是一个基于STM32HAL库的CAN中断接收例程:
```c
#include "stm32f4xx_hal.h"
CAN_HandleTypeDef hcan1;
void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* hcan)
{
if (hcan->Instance == CAN1)
{
// 处理接收到的数据
uint8_t data[8];
for (int i = 0; i < 8; i++)
{
data[i] = hcan->pRxMsg->Data[i];
}
// 继续等待下一次接收
HAL_CAN_Receive_IT(&hcan1, CAN_FIFO0);
}
}
int main(void)
{
HAL_Init();
__HAL_RCC_CAN1_CLK_ENABLE();
hcan1.Instance = CAN1;
hcan1.Init.Mode = CAN_MODE_NORMAL;
hcan1.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_6TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_3TQ;
hcan1.Init.Prescaler = 2;
hcan1.Init.SJW = CAN_SJW_1TQ;
HAL_CAN_Init(&hcan1);
CAN_FilterTypeDef can_filter;
can_filter.FilterIdHigh = 0xFFFF;
can_filter.FilterIdLow = 0xFFFF;
can_filter.FilterMaskIdHigh = 0x0;
can_filter.FilterMaskIdLow = 0x0;
can_filter.FilterFIFOAssignment = CAN_FilterFIFO0;
can_filter.FilterMode = CAN_FILTERMODE_IDMASK;
can_filter.FilterScale = CAN_FILTERSCALE_32BIT;
can_filter.FilterActivation = ENABLE;
HAL_CAN_ConfigFilter(&hcan1, &can_filter);
HAL_CAN_Receive_IT(&hcan1, CAN_FIFO0);
while (1)
{
// 主循环中可以处理其他事情
}
}
```
在这个例程中,我们使用了 `HAL_CAN_RxCpltCallback()` 函数作为 CAN 接收中断的回调函数,实现了接收到数据后的处理。在 `main()` 函数中,我们先初始化 CAN 模块和过滤器,然后调用 `HAL_CAN_Receive_IT()` 函数启动接收中断。在 `while` 循环中,我们可以处理其他事情,接收中断的处理会在中断发生时自动调用回调函数。
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