Messages in this thread | | | Subject | Re: Handshaking on USB serial devices | From | Krzysztof Halasa <> | Date | Thu, 14 Feb 2008 23:39:09 +0100 |
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Gene Heskett <gene.heskett@gmail.com> writes:
> Apparently they do not Alan, the pl2303 in particular is a problem child, > throwing several lost com errors a day when doing nothing more strenuous than > talking to my belkin UPS from apcupsd, very small packets there, 20 bytes I > believe at several second intervals.
Is your UPS using "modern" hardware handshaking (CTS = PC can send, with RTS practically always asserted)? Or perhaps the "old", "half-duplex" V.24-style (RTS asserted before TX and then waiting for CTS)?
Are you sure it uses hw handshaking at all? Most (all?) UPSes I used had only TxD and RxD (for RS-232). -- Krzysztof Halasa
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