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XON/XOFF values

by talexb (Chancellor)
on Aug 01, 2002 at 03:11 UTC ( [id://186666] : note . print w/replies, xml ) Need Help??

in reply to Re: Reading data from the Serial Port
in thread Reading data from the Serial Port

XON is ^Q, XOFF is ^S -- I just remember that they are S and Q, with the S standing for Stop and the Q for Qontinue. ^A has a hex value of 1 (0x01), so if you know that T is the twentieth letter in the alphabet, then you can figure out that ^S is 0x13 and ^Q is 0x11. SOme ASCII charts have them as DC3 and DC1, respectively -- the DC part stands for Device Control.

--t. alex

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Re: XON/XOFF values
by BrowserUk (Patriarch) on Aug 01, 2002 at 03:21 UTC

    ++. I couldn't remember, its been a long time since I played with comm ports. 14 & 15 are of course ShiftIn and ShiftOut which are (or maybe have been) used for similar handshaking purposes under some protocols.