I have some questions about LPUART1 of 'S32K142'.I use it with LIN transceiver 'ATA663211'.
I use it to be master.
My transmit function is right,but receive function is stranger.
When I want to receive data form slave,I transmit head first.Then I receive data.
I use code like this 'if(LPUART1->STS & rdrf mask) else if(LPUART1->STS & tc mask)' in the interrupt.
The problem is when I want to transmit data,the rdrf is '1',so it do the receive work.I don't know how rdrf to be '1'.
I clear it at first.
So I want to know whether other status would change the rdrf.
Such as over run status,if it's '1',can I clear the rdrf by reading data register.