STM32 CAN时间触发通讯

STM32是一款广泛使用的微控制器系列，其中包括了CAN（Controller Area Network）通信接口。CAN总线是一种常用的实时通信协议，常用于汽车电子、工业自动化等领域。

在STM32中，CAN通信可以通过两种方式进行：基本CAN和高级CAN。

对于基本CAN，可以使用时间触发模式进行通信。时间触发模式允许在特定时间间隔内发送或接收CAN消息，而不需要外部触发信号。这对于周期性的通信非常有用。

以下是一个使用时间触发模式进行CAN通信的示例代码：

#include "stm32f4xx.h"

void CAN_Configuration(void) {
    CAN_InitTypeDef CAN_InitStruct;
    CAN_FilterInitTypeDef CAN_FilterInitStruct;

    // Enable CAN1 clock
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);

    // Configure CAN1
    CAN_DeInit(CAN1);
    CAN_StructInit(&CAN_InitStruct);
    CAN_InitStruct.CAN_TTCM = DISABLE;
    CAN_InitStruct.CAN_ABOM = DISABLE;
    CAN_InitStruct.CAN_AWUM = DISABLE;
    CAN_InitStruct.CAN_NART = DISABLE;
    CAN_InitStruct.CAN_RFLM = DISABLE;
    CAN_InitStruct.CAN_TXFP = DISABLE;
    CAN_InitStruct.CAN_Mode = CAN_Mode_Normal;
    CAN_InitStruct.CAN_SJW = CAN_SJW_1tq;
    CAN_InitStruct.CAN_BS1 = CAN_BS1_9tq;
    CAN_InitStruct.CAN_BS2 = CAN_BS2_8tq;
    CAN_InitStruct.CAN_Prescaler = 3;
    CAN_Init(CAN1, &CAN_InitStruct);

    // Configure CAN filter
    CAN_FilterInitStruct.CAN_FilterNumber = 0;
    CAN_FilterInitStruct.CAN_FilterMode = CAN_FilterMode_IdMask;
    CAN_FilterInitStruct.CAN_FilterScale = CAN_FilterScale_32bit;
    CAN_FilterInitStruct.CAN_FilterIdHigh = 0x0000;
    CAN_FilterInitStruct.CAN_FilterIdLow = 0x0000;
    CAN_FilterInitStruct.CAN_FilterMaskIdHigh = 0x0000;
    CAN_FilterInitStruct.CAN_FilterMaskIdLow = 0x0000;
    CAN_FilterInitStruct.CAN_FilterFIFOAssignment = 0;
    CAN_FilterInitStruct.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&CAN_FilterInitStruct);
}

int main(void) {
    // Initialize CAN
    CAN_Configuration();

    // Enable CAN1
    CAN_Cmd(CAN1, ENABLE);

    // Wait for synchronization
    while(CAN_GetFlagStatus(CAN1, CAN_FLAG_SYNCOK) == RESET);

    // Start CAN1 transmission
    CAN_Transmit(CAN1, &TxMessage);

    while(1) {
        // Check if a message is received
        if(CAN_GetFlagStatus(CAN1, CAN_FLAG_FMP0) != RESET) {
            // Read received message
            CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);
        }
    }
}

这是一个简单的CAN通信示例，其中CAN的时间触发模式被配置为发送和接收CAN消息。你可以根据自己的需求修改和扩展这个代码。

希望这对你有帮助！如果你有任何其他问题，请随时提问。