Hello Christian, I had the suspicion that a UART reset in the code is missing, however I could not verify that because I never had those problems with wrong bytes. Out of curiousity, have you tried if just the following line is enough to fix the problems you noticed ?

+ uart_reg_write(uart, MDR1, 0x07); /* turn off UART */

This should cause the UART to be reset and I would expect that setting the XON/XOFF characters is not needed as long XON/XOFF handshake is not turned on. Thanks and best regards, Dieter -- Dieter Spaar, Germany spaar@mirider.augusta.de