Programming instructions

Intermec Fingerprint v7.61 – Programmer’s Reference Manual Ed. 746
Chapter 2 Program Instructions
COMSET
Field of Application Statement setting the parameters for background reception of data to the
buffer of a specifi ed communication channel (see COMBUF$).
Syntax COMSET<nexp
1
>,<sexp
1
>,<sexp
2
>,<sexp
3
>,<sexp
4
>,<nexp
2
>
<nexp
1
> is one of the following communication channels:
1 = "uart1:"
2 = "uart2:"
3 = "uart3:"
4 = "centronics:"
5 = "net1:"
6 = "usb1:"
<sexp
1
> specifi es the start of the message string (max. 12 char).
<sexp
2
> specifi es the end of the message string (max. 12 char).
<sexp
3
> specifi es characters to be ignored (max. 42 char).
<sexp
4
> specifi es the attention string (max. 12 char).
<nexp
2
> specifi es the max. number of characters to be received.
Enter a value ≥1. (If <nexp2> = 0, the fi rst character
will be lost.)
Remarks
Data can be received by a buffer on each of the communication channels
without interfering with the running of the current program. At an appropriate
moment, the program can fetch the data in the buffer and use them according
to your instructions. Such background reception has priority over any
ON KEY GOSUB statement.
Related instructions are COMSTAT, ON COMSET GOSUB, COMSET ON,
COMSET OFF, COM ERROR ON/OFF, and COMBUF$.
The communication channels are explained in connection with the
DEVICES statement.
The start and end strings are character sequences which tells the printer when
to start or stop receiving data. Max. 12 characters, may be "".
It is possible to make the printer ignore certain characters. Such characters
are specifi ed in a string, where the order of the individual characters does
not matter. Max. 42 characters, may be "".
The attention string interrupts the reception. Max. 12 characters, may be "".
The length of the afore-mentioned COMSET strings are checked before
they are copied into the internal structure. If any of these strings are too long,
Error 26, “Parameter too large” will occur.
When the printer has received the specifi ed maximum number of characters,
without previously having encountered any end string or attention string, the
transmission will be interrupted. The maximum number of characters also
decides how much of the memory will be allocated to the buffer.