Contents, cont'd. - Intermec

COMSET
Chapter 2 Program Instructions
Field of Application Statement setting the parameters for background reception of data to
the buffer of a specified communication channel.
Syntax COMSET,,,,,
1 1 2 3 4 2
is one of the following communication channels:
1
1 = "uart1:"
2 = "uart2:"
3 = "uart3:"
4 = "centronics:"
specifies the start of the message string (max. 12 char.).
1
specifies the end of the message string (max. 12 char.).
2
specifies characters to be ignored (max. 42 char.).
3
specifies the attention string (max. 12 char.).
4
specifies the max. number of characters to be received.
2
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
specified 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
condition 26 (“Parameter too large”) will occur.
When the printer has received the specified maximum number of characters,
without previously having encountered any end string or attention string, the
transmission will be interrupted. The max. number of characters also decides
how much of the memory will be allocated to the buffer.
Intermec Fingerprint 7.2 – Reference Manual Ed. 3 43