AR-B1380/AR-B1380A User’ s Guide
Page 77
(4) Receive data
The RS-485’ s operation of receiving data is the same as RS-232’ s.
(5) Basic Language Example
a.) Initialize 86C450 UART
10
OPEN “ COM1:9600,m,8,1” AS #1 LEN=1
20
REM Reset DTR
30
OUT &H3FC, (INP(%H3FC) AND &HFA)
40
RETURN
b.) Send out one character to COM1
10
REM Enable transmitter by setting DTR ON
20
OUT &H3FC, (INP(&H3FC) OR &H01)
30
REM Send out one character
40
PRINT #1, OUTCHR$
50
REM Check transmitter holding register and shift register
60
IF ((INP(&H3FD) AND &H60) >0) THEN 60
70
REM Disable transmitter by resetting DTR
80
OUT &H3FC, (INP(&H3FC) AND &HEF)
90
RETURN
c.) Receive one character from COM1
10
REM Check COM1: receiver buffer
20
IF LOF(1)<256 THEN 70
30
REM Receiver buffer is empty
40
INPSTR$”
50
RETURN
60
REM Read one character from COM1: buffer
70
INPSTR$=INPUT$(1,#1)
80
RETURN
Summary of Contents for AR-B1380
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