CAN 发送数据少了一帧

只看该作者 · 2021-5-19 14:13

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分析下为什么少了一帧数据

只看该作者 · 2021-5-19 14:16

/*******************************************************************************
功能: CAN 数据处理函数
*******************************************************************************/
void DealCanSlave(void )
{
CANMSG *Pcanmsg =&CanMsgData ;
Pcanmsg->std_id=0x761;

TxHeader.StdId=CanMsgData.std_id;
TxHeader.ExtId = 0x01;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.IDE = CAN_ID_STD;
TxHeader.DLC = 8;
TxHeader.TransmitGlobalTime = DISABLE;

Pcanmsg->TxData[0]=LOBYTE(pv_sys_cond_out/10);  // pv_sys_cond_out/10;
Pcanmsg->TxData[1]=HIBYTE(pv_sys_cond_out/10);
Pcanmsg->TxData[2]=0x01;
Pcanmsg->TxData[3]=0x01;
Pcanmsg->TxData[4]=0x01;
Pcanmsg->TxData[5]=0x01;
Pcanmsg->TxData[6]=0x01;
Pcanmsg->TxData[7]=0x01;
HAL_CAN_AddTxMessage(&CAN1_Handler, &TxHeader, Pcanmsg->TxData, &Pcanmsg->TxMailbox) ;

Pcanmsg->std_id=0x762;

TxHeader.StdId=CanMsgData.std_id;
TxHeader.ExtId = 0x01;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.IDE = CAN_ID_STD;
TxHeader.DLC = 8;
TxHeader.TransmitGlobalTime = DISABLE;

Pcanmsg->TxData[0]=LOBYTE(pv_sys_cond_out/10);  // pv_sys_cond_out/10;
Pcanmsg->TxData[1]=HIBYTE(pv_sys_cond_out/10);
Pcanmsg->TxData[2]=0x02;
Pcanmsg->TxData[3]=0x02;
Pcanmsg->TxData[4]=0x02;
Pcanmsg->TxData[5]=0x02;
Pcanmsg->TxData[6]=0x02;
Pcanmsg->TxData[7]=0x02;
HAL_CAN_AddTxMessage(&CAN1_Handler, &TxHeader, Pcanmsg->TxData, &Pcanmsg->TxMailbox) ;

Pcanmsg->std_id=0x763;

TxHeader.StdId=CanMsgData.std_id;
TxHeader.ExtId = 0x01;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.IDE = CAN_ID_STD;
TxHeader.DLC = 8;
TxHeader.TransmitGlobalTime = DISABLE;

Pcanmsg->TxData[0]=LOBYTE(pv_sys_cond_out/10);  // pv_sys_cond_out/10;
Pcanmsg->TxData[1]=HIBYTE(pv_sys_cond_out/10);
Pcanmsg->TxData[2]=0x03;
Pcanmsg->TxData[3]=0x03;
Pcanmsg->TxData[4]=0x03;
Pcanmsg->TxData[5]=0x03;
Pcanmsg->TxData[6]=0x03;
Pcanmsg->TxData[7]=0x03;
HAL_CAN_AddTxMessage(&CAN1_Handler, &TxHeader, Pcanmsg->TxData, &Pcanmsg->TxMailbox) ;

Pcanmsg->std_id=0x764;

TxHeader.StdId=CanMsgData.std_id;
TxHeader.ExtId = 0x01;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.IDE = CAN_ID_STD;
TxHeader.DLC = 8;
TxHeader.TransmitGlobalTime = DISABLE;

Pcanmsg->TxData[0]=LOBYTE(pv_sys_cond_out/10);  // pv_sys_cond_out/10;
Pcanmsg->TxData[1]=HIBYTE(pv_sys_cond_out/10);
Pcanmsg->TxData[2]=0x04;
Pcanmsg->TxData[3]=0x04;
Pcanmsg->TxData[4]=0x04;
Pcanmsg->TxData[5]=0x04;
Pcanmsg->TxData[6]=0x04;
Pcanmsg->TxData[7]=0x04;
HAL_CAN_AddTxMessage(&CAN1_Handler, &TxHeader, Pcanmsg->TxData, &Pcanmsg->TxMailbox) ;
}

只看该作者 · 2023-11-16 11:15

可能是总线负荷增加或数据吞吐量增加，导致数据传输速度跟不上数据的生成速度，从而导致数据丢失。