> -----Original Message----- > From: ZhangXiao > Sent: June 25, 2008 4:07 AM > > Based on theses lines, characters should be written to the THR > continuous, no matter if it had already move the character to the TSR. I > think it is not safe in some cases so I add a line > > wait_for_xmitr(up, UART_LSR_THRE); > > before line 3. And then the issue in my target was disappeared. This is > a static function that was already exist in the same file. It just check > and wait until the THR was empty. Do you have the FIFO's disabled, but transmit_chars() thinks they are enabled? Sounds to me like that might be your problem and without the wait_for_xmitr() call you are overrunning the transmitter. In other words, if you have FIFOs disabled, up->tx_loadsz should be 1. What UART are you using? ..Chris -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
