S32K144

zq1 — Thu, 31 Aug 2023 02:46:53 GMT

i am using lin api sdk to build my project ,but sometimes , send data will enter LIN_READBACK_ERROR,

below is my lincallback:

LIN_DRV_Init(INST_LIN1, &lin1_InitConfig0, &lin1_State);
LIN_DRV_InstallCallback(INST_LIN1, LINCallBack);
LIN_DRV_EnableIRQ(INST_LIN1);
INT_SYS_EnableIRQ(LPUART2_RxTx_IRQn);
INT_SYS_EnableIRQGlobal();

void LINCallBack(uint32_t instance, void * linState)

{

static LIN_Message_T Lin_msg_temp ={0};

(void)instance;

const lin_state_t * linCurrentState = linState;

Lin_msg_temp.id = linCurrentState->currentId;

status_t result = STATUS_UNSUPPORTED;

switch (linCurrentState->currentEventId)

{

case LIN_PID_OK: //正确帧头事件

if(0x3C == Lin_msg_temp.id)

{

//LIN_DRV_SetTimeoutCounter(INST_LIN1, 8);

result = LIN_DRV_ReceiveFrameData(INST_LIN1, g_aLINRxBuf, 8u);

if(result != STATUS_SUCCESS)

{

break;

}

else if(0x3D == Lin_msg_temp.id)

{

LIN_UDS_Tx_Processor();

// LIN_DRV_SendFrameData(INST_LIN1,UnSegDataReq.MessageTxData, UnSegDataReq.Length);

// LIN_DRV_SetTimeoutCounter(INST_LIN1, 8);

// result = LIN_DRV_SendFrameData(INST_LIN1, g_aLINTxBuf, sizeof(g_aLINTxBuf));

}

break;

case LIN_TX_COMPLETED:

{

if(tx_finished == true)

{

LIN_UDS_NL_USData_Con(&UnSegDataCon,&UnSegDataReq, pci_type);

tx_finished =false;

// pci_type = Unknown;

}

break;

case LIN_RX_COMPLETED:

{

for(uint8 i = 0;i<sizeof(g_aLINRxBuf);i++)

{

Lin_msg_temp.data[i] = g_aLINRxBuf[i];

}

Lin_msg_temp.length = linCurrentState->rxSize;

LIN_UDS_Receive_Message_FI(Lin_msg_temp);

}

break;

case LIN_CHECKSUM_ERROR:

{

num++;

}

break;

case LIN_FRAME_ERROR:

{

}

break;

case LIN_READBACK_ERROR:

{

num--;

}

case LIN_WAKEUP_SIGNAL:

{

}

break;

default:

/* do nothing */

break;

}

i want to know how to deal with the LIN_READBACK_ERROR and why LIN_READBACK_ERROR occurs

hope you人reply

Re: S32K144

PetrS — Tue, 05 Sep 2023 13:26:15 GMT

Hi,

for LIN transmitted byte is monitored back, if not the same, a transmission is stopped and LIN state is set to idle. The LIN_READBACK_ERROR event is called when LIN master is sending payload/checksum and received byte is not the same as transmitted one. Driver finally sets current state to IDLE after returning from callback.

BR, Petr

Re: S32K144

zq1 — Wed, 18 Oct 2023 06:31:26 GMT

thank you very much, but, i want to konw how to solve this problem,hope your reply

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