LIN bus

[peter]

 s this possible do LIN  with NRF5340 (uart) hardware and software wise

[Hung Bui]

Hi Peter, 
LIN bus isn't supported on the hardware on the nRF53. The software, I don't think we have anything.

There had been some questions in the past regarding this:
LIN-bus SW driver for nRF5x

 Does the nRF51822 UART support LIN bus? 

The NRF54 will support CAN bus, but I'm not so sure about LIN. 

[peter]

Lin bus uart requirements:

normal data bytes in lin are 8 bits with start and stop as normal uart comm. 

The bitrate is max 20kbit.

The sync break field is the one that is not like normal uart comm.

its a SYNC BREAK of min 13 bit (low) followed by

a SYNC DELIMITER (High)

Is this not possible with nrf5340 uart ?

If not can it be done in another way with a timer/capture/compare or so?

[Hung Bui]

Hi Peter, 

I checked around internally but I don't think we have done any study on this. The UART driver in Zephyr is quite non-flexible that you can't really use a TIMER to access the pin when it's already assigned to UART peripheral. 
It should be possible with big banging (use a timer as you said) for the SYNC BREAK but you will have to skip the default driver.