Date: Wed, 20 Feb 2002 22:02:38 -0500 From: David VanHorn <[EMAIL PROTECTED]> Subject: Re: [LIB] Some answers please?
> >I was more talking the fact that if it did multiplex the DTR/DSR, RTS/CTS >and CD/RI lines onto the TX/RX lines in software (and the IrDA dongle on >the other end reconstructed them) you'd not be able to hit 115200 and >you'd experience a significantly higher processor overhead as the >processor now has to do what the serial driver chip would have done ... It does sort of, but that's not what happens. The handshake is generated by your IRDA interface, according to the link state, and the rate at which the other end can take data. On the other end, handshake is from the peripheral to the irda device, and events here, you may never see. Same is true in the other direction. The one thing they DONT do, is echo the handshake lines of the peripheral directly back to you. > if the things were designed to permit IrDA printing though I doubt this > would be done because as I said, all printers really need is TX/RX (and > software flow control). > >Oh and yes proper IrDA devices negotiate the link speed based on >conditions but remember, we're trying to trick non-IrDA devices to link >into IrDA ... unfortunately not many standard serial devices will >autonegotiate a speed. That's only happening on the IRDA link. On the cable, that's up to dipswitches and such. The IR link, and the physical cable ends are not directly coupled, and that's one of the good features of irda. ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://libretto.basiclink.com/archive - Archives http://www.picante.com/~gtaylor/portable/faq.html - FAQ -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
