I am now working on 5748G EVB using the Freescale examples (AN4830) to transmit LIN frames. However, I found the EVB fails to send out a LIN frame sometimes using the same code. I have checked the LIN transceiver power and it was OK. When the error occurs, the in LINESR the stuck at zero bit (SZF) and bit error flag(BEF) is set, and the there is no frame send out. I am sure the code once worked, is there something else I could have omitted?