MKE1xF512VLH16 lpuart RX interrupt

[shar2021]

Hello,

              I have to implement a callback function for RX. I have a variable command which will be sent from terminal. For eg , in this data block can be 1 byte or 200 bytes and rest are fixed. 

STX , Address, SEQ Number, DataBlock(n), ETX, CRC. 

I am using Ring buffer method.

For now i am using the sample example of twrke18f_lpuart_interrupt_rb_transfer. The buffer is fixed to 8 , so it receives only 8 bytes. 

sendXfer.data = g_txBuffer;
sendXfer.dataSize = ECHO_BUFFER_SIZE;
receiveXfer.data = g_rxBuffer;
receiveXfer.dataSize = ECHO_BUFFER_SIZE;

I do get a complete data 

02 0x31 0x31 Z 0x03 0xCRC

I can not get variable frame ,For my example how do i trigger call back when ETX is received without depending on the size as above.

Attaching code files.

Please help with expert guidance

[Robin_Shen]

Hi shar2021,

Check the IDLE of "48.3.1.7 LPUART Status (STAT)".

You can enable the Idle Line Interrupt by ILIE of 48.3.1.8 LPUART Control (CTRL).

Best Regards,
Robin
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[shar2021]

Hello @Robin_Shen ,

                                 Thanks for response. I have question, Can ring buffer concept be used for variable length packet? I tried the interrupt mode too instead of ring buffer, I was unable to receive variable length packets.

Do you have any example for variable length frame?

Thanks  

[Robin_Shen]

Sorry for the delay!
Have you test the twrke18f_lpuart_edma_rb_transfer?