Though the types of devices interacting with the printer's
ports may vary greatly, internal to the printer, the ports are all
handled in the same way. These ports are opened with the ZBI
OPEN
command
and closed with the ZBI
CLOSE
command. When one
of these ports is opened, it is disconnected from the ZPL parser
and any data in the buffer will be redirected to the ZBI environment.
Example
In the following example,
"SER"
could
be replaced by
"PAR"
,
"USB"
, or
"BLU"
depending
on the application.
10 CLOSE ALL
20 LET INPORT = 1
25 SLEEP 1
30 OPEN #INPORT: NAME "SER"
35 ON ERROR GOTO 25
40 PRINT #INPORT: "Enter your name:";
50 INPUT #INPORT: YOURNAME$
55 ON ERROR GOTO 70
60 PRINT #INPORT: "You entered: "; YOURNAME$
70 CLOSE #INPORT
