Remote-processing CAMBASIC Manual do Utilizador descarregar pdf (Página 55)

Commands - 22

COM$

Process Function

SYNTAX: n$ = COM$(n)

PURPOSE: To return a string from the serial input buffer. This function is usually used in conjunction with ON

COM $.

REMARK S: n = legal serial port number (1 or 2).

COM$ returns the characters in the buffer up to the terminating character (if specified) or the total

number of characters in the buffer.

When COM$ is executed, the characters in the buffer are removed. Immediately executing COM$

again will produce a null string.

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: CLEAR COM$, ON COM$, CONFIG COM$

EXAMPLE: See the ON COM $ statemen t.

ERROR: < Data negative> – for n

< Illegal argument> – if n is not a legal serial port number

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Remote-processing CAMBASIC Manual do Utilizador Página 55