UBI EasyCoder 201 IISA Manual de instrucciones descargar pdf (Pagina 78)

Intermec Fingerprint 6.13 – Programmer's Guide

7. INPUT TO FINGERPRINT, cont'd.

8. Background

Communication, cont'd.

LOF (Length-of-File)

The LOF function returns the status of the buffers in an OPENed

communication channel:

- If a channel is OPENed for INPUT, the remaining free space

(bytes) in the receive buffer is returned.

- If a channel is OPENed for OUTPUT, the remaining number of

characters to be transmitted from the transmitter buffer is returned.

The example shows how the number of free bytes in the receive

buffer of communication channel "uart2:" is calculated:

10 OPEN "uart2:" FOR INPUT AS #2

20 A%=LOF(2)

30 PRINT A%

...

80 COMSET 1 ON

90 IF QDATA$="" THEN GOTO 90

100 END

1000 QDATA$=COMBUF$(1)

1010 IF COMSTAT(1) AND 2 THEN PRINT A$

1020 IF COMSTAT(1) AND 4 THEN PRINT B$

1030 IF COMSTAT(1) AND 8 THEN PRINT C$

1040 IF COMSTAT(1) AND 32 THEN PRINT D$

1050 PRINT QDATA$

1060 RETURN

RUN

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 180 181

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UBI EasyCoder 201 IISA Manual de instrucciones Pagina 78