Remote Processing CAMBASIC User Manual
Page 55
Comm ands - 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:
C L E AR C O M $, O N C O M$ , C ON F I G C O M $
EXAMPLE:
See the ON COM $ statemen t.
ERROR:
< Data negative> – for n
< Illegal argument> – if n is not a legal serial port number