Exactly. This is my greatest fear.
In data venerdì 02 aprile 2010 15:54:27, Andrew Kohlsmith (mailing lists account) ha scritto: : > On Thursday 01 April 2010 09:38:15 pm Philippe De Muyter wrote: > > We use a pure user-level solution with > > > > ioctl(fd, TIOCMBIS, TIOCM_RTS); > > /* wait some delay or rely on a CTS */ > > write(fs, message, message_len); > > /* eventually wait for a message_len based delay*/ > > tcdrain(fd); > > ioctl(fd, TIOCMBIC, TIOM_RTS); > > The biggest problem with that is not being able to have good control of the > delay between the tcdrain() and ioctl(); for things like ModBus you end up > with corrupted responses because the unit you've addressed has already > started writing its response before you have shut off your transmitter. > > For ModBus slave devices this solution would work without much issue at > all. > > -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 > -- Fabio Giovagnini Aurion s.r.l. P.I e C.F. 00885711200 Tel. +39.051.594.78.24 Cell. +39.335.83.50.919 _______________________________________________ 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
