On Friday 15 June 2007 18:03, Marcel Moolenaar wrote: > The loop is formed by the transmit interrupt of the UART. > When UART_TRANSMIT() is called, the FIFO of the UART is > written and transmission starts. Eventually the UART will > raise a "transmission done" interrupt, which will trigger > the next iteration.
I see. However: > If the UART has no FIFO (in the 16550-sense), then sc_txfifosz > is still 1. But where is this set? The ns8250_bus_probe() function returns early when it detects a FIFO-less device, leaving sc_txfifosz at its pre-initialized value (i.e. zero). And it doesn't seem to get set anywhere else, either. Regards, Christian Kandeler _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
