Remote-processing BASIC 52 Instrukcja Użytkownika Pobierz pdf (Strona 29)

RPBASIC-52 PROGRAMMING GUIDE

2-10

NOTE: This command takes approximately 27 ms to process. This is because the reader sends a bit of

information every 1 ms. Serial and timing interrup ts are processed a t the hardware level. However,

commands such as ONTICK and ONITR are delayed until CARD$ is finished processing the data.

CONFIG LINE

ERROR

BAD ARGUMENT When expr > 3 or negative

EXAMPLE

The following example reads the card. CONFIG LIN E is performed only once. The error code is returned in

B if no card was swiped.

CONFIG LINE 100,12,0,255,0,0

10 STRING 200,10

100 GOSUB 1000

110 IF B = 1 THEN 100

120 PRINT "Card number: ",$(0)

130 GOTO 100

1000 $(0) = CARD$(0)

1010 IF ASC($(0),1)= 45 THEN 1040:REM See if '-'

1020 B=0

1030 RETURN

1040 B = ASC($(0),2)-48:REM Return error number

1050 $(0)= ""

1060 RETURN

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Remote-processing BASIC 52 Instrukcja Użytkownika Strona 29