Programmer's Reference Manual Intermec Fingerprint® v8.70.0 ...

Chapter —Program Instructions
COMSET, cont.
The reception of data to the buffer can be interrupted by four conditions:
• If an end string being encountered.
• If an attention string being encountered.
• If the maximum number of characters being received.
• If error-handling is enabled for the communication channel in question
(see COM ERROR ON/OFF) and an communication error occurs.
This condition can be checked by a COMSTAT function.
Any interruption will have a similar effect as a COMSET OFF statement,
that is close the reception, but the buffer will not be emptied and can still
be read by a COMBUF$ function. After the reception has been interrupted,
an ON COMSET GOSUB statement can be issued to control what
will happen next.
COMSET does not support auto-hunting (see SETSTDIO).
Example This example shows how "uart1:" is opened for background communication.
Any record starting with the character # and ending with the character
& will be received. The characters Z, Y and X will be ignored. The
character = will stop the reception. Max. 50 characters are allowed.
1 REM Exit program with #STOP&
10 COMSET1,"#","&","ZYX","=",50
20 ON COMSET 1 GOSUB 2000
30 COMSET 1 ON
40 IF A$ "STOP" THEN GOTO 40
50 COMSET 1 OFF
.....
.....
1000 END
2000 A$= COMBUF$(1)
2010 PRINT A$
2020 COMSET 1 ON
2030 RETURN
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