IMXRT1024 LPUART Get Send/Receive Count

[Lukas_Frank]

Hi all, 

I am really stucked about how can I get receive or send count in data transfer. I have three question :

Q1 : How can I get send or receive data size on bus while I am using LPUART_WriteByte and LPUART_ReadByte? Like LPUART_TransferGetSendCount and LPUART_TransferGetReceiveCount?

Q2: I am not able to get receive count in LPUART hardware flow control example in SDK what is the correct usage of that? I am calling

• int32_t count = 0;
• LPUART_TransferGetReceiveCount(DEMO_LPUART,&g_lpuartHandle,&count);

lines after LPUART_TransferSendNonBlocking function.

Q3: In my case main purpose is detecting incoming byte count in LPUART Polling approach. Then I want to read bytes as many as detected count. How can I do that? I know RXCOUNT mask can help to me but I wonder about How can I catch or detect exact byte count that coming to the bus?

Thanks and Regards.

[Alexis_A · Accepted solution]

Hello @Lukas_Frank,

Unfortunately, the UART protocol doesn't have a way to know the size of the incoming data unless you communicate previously from the other side. So you could try to sent first the size of the incoming data.

Best Regards,

Alexis Andalon