Using a LIN Bus via TJA1020 Transceiver needs to handle the statemachine bevor you will be able to send or receive data from the bus. This is encapsulated within this class.
none.
But this was designed for use on the Lin Stack, my Lin-Interface Library: https://github.com/mestrode/Lin-Interface-Library
Take a look into the basic example.
- Datasheet of TJA1020 https://www.nxp.com/docs/en/data-sheet/TJA1020.pdf