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40 RETURN
b. Send out one character to COM1
10
REM Enabled 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 Disabled 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
NOTE: The RS-485 of the FP8082 uses COM1. If you want to program it and
hardware setup, please refer to the
for COM1 address setup.
60
