AN4101

Implementing a LIN slave node with STM8AF board

Doc ID 23127 Rev 1

11/21

5.2.2

LINUART interrupt

The LINUART interrupt reads and clears the hardware flags in the LINUART registers, and

sets the appropriate software flags to allow transitions in the basic LIN driver state machine:

●

HeaderReceived, which is set if the header detection flag (LHDF) is set in the interrupt

routine

●

DataReceived, which is set if the RXNE flag is set

●

IdentifierParityError, which might be set if the header detection flag is set, after first

checking the parity flag

●

ReceptionError, which is set if the case framing error flag (FE), the overrun flag (OR),

or the LIN synchro flag (LSF) is set