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Communication parameters
(7) Program example
Program
General flowchart
To change the operation mode to computer link operation
1000 *REC
1010 IF LOC(1)=0 THEN RETURN
1020 PRINT"RECEIVE DATA"
1040 RETURN
140 GOTO 50
Interrupt data receive
1030 PRINT INPUT$(LOC(1),#1)
130 PRINT#1,D$
Data send
Initial setting of I/O fileLine number
Interrupt occurrence during data receive
30 ON COM(1)GOSUB*REC
20 COMST1,1,1:COMST1,2,1
10 OPEN"COM1:9600,E,8,2,HD"AS #1
Opening the communication file
40 COM(1)ON
50 D$="01FB10000"
Send data setting
Sum code calculation
80 A$=MID$(D$,I,1)
90 A=ASC(A$)
100 S=S+A
110 NEXT I
70 FOR I=1 TO LEN(D$)
60 S=0
Addition of control and sum codes
120 D$=CHR$(&H5)+D$+RIGHT$(HEX$(S),2)
ON/OFF setting of circuit control signals (RS, ER)
Interrupt enable
Interrupt definition for data receive
to
to
Line number
I/O file initial
setting
50
140
to
10
40
1000
1040
Interrupt
Receive data processing
Data import
Screen display
Send data processing
Data setting
Sum code calculation
Data send