Remote-processing CAMBASIC Bedienungsanleitung PDF herunterladen (Seite 179)

CONFIG C ommands - 6

CONFIG COM$

Tasking Statement

SYNTAX: CONFIG C OM$ n,terminator, length,XON ,echo

PURPOSE: To configure a communication port to interr upt when the progr ammed conditions are met.

REMARK S: The CONFIG COM $ statement is used in conjunction with the ON COM $ statement so that the

foreground program is interrupted when either a specific message length has been received or a

specified termination character has been received.

n = legal serial port number.

The terminator is equal to the termination character of the incoming string. This is normally a

carriage retur n (13) but it ma y be any character from 1 to 127. If you specify 0, C AMBASIC will

not test for a terminator.

In some cases there is no termination character. The length of the message is always the same. In

this case the length parameter should be set to the message length. T he range is 1 to 127 char acters.

If you specify “0”, CAMBASIC will not check for length.

The XON parameter enables or disables XON/X OFF protocol checking by the serial port. Setting

this param eter to ” 1” enables the pr otocol, and setting it to “ 0” disables the protocol.

The echo param eter determines when the in coming characters are to be echoed. W hen a “ 1” is

specified, the characters are echoed. Characters ar e not echoed when the parameter is “ 0”.

See the Multitasking Chapters for more inform ation.

RPC-2350 NOTE: The CAM BASIC statement BIT 128,4, 0 may need to be executed before you

will receive any characters. This command enables the CTS line to the sender.

RELATED: ON COM$, COM$

EXAMPLE: 10 CONFIG COM$ 2,13,0,0,0

This exam ple configur es COM2 so that the term inator is a ca rriage return. T here is no length

checking, XON/X OFF protocol and no character echo.

ERROR: < Data negative> – for n,terminator,length,XON ,echo

< Data out of range> – if n is not 1, 2 or 3; terminator or length > 127;

XON or echo > 1

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Remote-processing CAMBASIC Bedienungsanleitung Seite 179