S32K

[zq1]

i am building a project with lpuart_lin ,using RTD,but i did not found the api about receive data, what i can find like this only in Lpuart_Lin_Ip.c,but they are static ,

what api function could i use to receive data or send data?

thank you

[danielmartynek]

Hi @zq1,

Please specify the MCU part.

Is the MCU used as LIN Master or Slave?

The static function you mentioned is called from the LIN interrupt handler, and it calls a callback function at the end.

It was discussed here:

https://community.nxp.com/t5/S32K/S32K148-EVB-How-to-send-recieve-LIN-bus-message-with-Real-Time/m-p...

Regards,

Daniel

[zq1]

thank you very much, the mcu is S32K312,   s32k1XX i had finished my project 3 months ago,the S32K3 is much different with S32K1xx, 

[danielmartynek]

Hi @zq1,

There are S32K3xx RTD examples you can refer to.

As I said, you need to use the callback.

Regards,

Daniel

[zq1]

first of all, thank you very much, but there is still a problem i did not work out, my lpuart_lin can send frame,but can not receive data,the case LPUART_LIN_IP_RX_COMPLETED can not enter

void LIN_CallBack(const uint8 Instance, const Lpuart_Lin_Ip_StateStructType *LinState)

{

(void)Instance;

//const Lpuart_Lin_Ip_StateStructType * linCurrentState = LinState;

Lin_msg_temp.id = LinState->CurrentPid & 0x3f;

//Lpuart_Lin_Ip_StateStructType 没有id的成员，这里需要搞清楚pid与id的关系

switch (LinState->CurrentEventId)

{

case LPUART_LIN_IP_RECV_HEADER_OK:

if(0x3C == Lin_msg_temp.id)

{

memcpy(g_aLINRxBuf,LinState->RxBuff,LinState->CntByte);

num++;

}

    else if(0x3D == Lin_msg_temp.id)

{

    Lpuart_Lin_Ip_SendFrame(INST_LIN2, &LinLpuartPdu);

    num++;

}

   break;

case LPUART_LIN_IP_RX_COMPLETED:

{

memcpy(g_aLINRxBuf,LinState->RxBuff,LinState->CntByte);

Lin_msg_temp.length = LinState->CntByte;

num++;

}

break;

case LPUART_LIN_IP_TX_COMPLETED:

{

//clear tx buffer

num++;

}

break;

default:

  /* do nothing */

break;

}

}

in rtd lpuart_lin_Ip.c,it can not enter  case LPUART_LIN_IP_NODE_STATE_RECV_DATA:

[cuongnguyenphu]

Could you confirm my understanding about your issue as below diagram:

Your LIN frame is sent from MASTER, and the Response field is from Master
In Slave side, you used LIN_Callback() to receive data. And your current issue is this LIN_Callback cannot reach LPUART_LIN_IP_RX_COMPLETED state?

Furthermore, I saw in your code that after receive Header, you will call this function to store data:
Lpuart_Lin_Ip_SendFrame(INST_LIN2, &LinLpuartPdu);

What is parameters of LinLpuartPdu? Because I expect that LinLpUartPdu should have parameter LIN_FRAMERESPONSE_RX to receive data

[zq1]

Lpuart_Lin_Ip_SendFrame(INST_LIN2, &LinLpuartPdu);  this  function is to send data?not receive data?

[cuongnguyenphu]

This function receive data when LinLpuartPdu has parameter LIN_FRAMERESPONSE_RX