AURIX™ Forum Discussions

[PaulY]

Hello,

I have questions about ASCLIN communication in TC36x. 

I want to send response to header of master node in slave mode for LIN communication using RX interrupt.

I configure to enable interrupt when EVB receives header from masternode by setting FLAGSENABLE.RHE bit.

actually the interrupt occurs when the EVB received header, but doesn't happend exactly.

I expected to happen interrupt after STOP bit of ID field in header frame, but interrupt is occured before STOP bit. 

so now, I implemented to send response function in RX interrupt service routine. Sometimes, It has frame error problem that response frame overlaps the end of header frames (overlaps stopbit of ID field). I checked this situation with a scope. 

I don't know what I am missing to configure. I want solution about this problem.

thanks.

[dw]

Please refer to 36.3.7.3 LIN Slave Sequences in user manual. If any question please feel free to ask.

[PaulY]

Hello dw, thank you for your reply to me

I refered to 36.3.7.2 LIN Master Sequences in user manual. because I want to send response to the latest header. 

Can I use this sequence in RX interrupt service routine? After EVB receives header from master node, It has a RX interrupt and I implement user manual sequence in RX ISR 

but I dont know why response frame overlaps the end of header frame(exactly stopbit of ID Field) that is transmitted by master node.

So, I guess that RX interrupt is occured earlier than expected. and than EVB sends response before header frame end (stopbit)

 - RX interrupt timing in id field of header frame

[dw]

Have you checked there is any settings about the delay after Stop Bit? I have not fully examined the part, please read the manual to look up the delay or something else?

[PaulY]

Hello dw, 

I can't find delay parameter in this MCU. and I configure stopbit to 1 cuz LIN communication is neccesary 1 stopbit. 

I will also read more user manual to find about this situation to configure.

thank you.