I agree with your understanding of the standard. I guess that the Oxford guys wanted to keep the possibility of using both RTS input flow control AND half-duplex. JP Tosoni > -----Original Message----- > From: linux-serial-owner@xxxxxxxxxxxxxxx > [mailto:linux-serial-owner@xxxxxxxxxxxxxxx]On Behalf Of Grant Edwards > Sent: Monday, August 04, 2008 7:46 PM > To: linux-serial@xxxxxxxxxxxxxxx > Subject: Re: [PATCH/RFC] 8250: Auto RS485 direction control > > > On 2008-08-04, Tosoni <jp.tosoni@xxxxxxxxx> wrote: > > > Last remark: > > > > Interestingly, the RTS envelope on the Oxford chips is > > implemented with... the DTR pin. On our cards we have a piece > > of hardware which redirect the uart DTR pin to the external > > RTS in this case. > > Well, that's just plain wrong. The RS-232 standard was quite > clear that RTS is what's used to enable transmission. ;) > > -- > Grant Edwards grante Yow! I > have a VISION! It's > at a RANCID > double-FISHWICH on > visi.com an ENRICHED BUN!! > > -- > 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 > -- 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
