On Thursday 01 April 2010 01:48:21 pm Lennart Sorensen wrote: > Yeah I have only ever done it using a UART that can automatically control > the direction based on the transmit FIFO containing data or not (with > a programable delay before switching of the transmitter of course).
> I would hate to try and do it from software with an interrupt. Yuck. It's not that bad. :-) IRQ on transmit holding or shift register empty (ideally the latter). If you have only a THRE type interrupt then you have to set a timer for 1 word time (usually 9 bits) and after that timer, disable the transmitter. Of course when you go to send data again you have to make sure you turn on the transmitter. So you end up with two IRQs if you don't have a shift register empty type of interrupt. -A. _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
