Argox PA-20 Basic Programming Manual - Manual (Page 90)

PT-Basic Programming Manual Ver. 1.00 89/143
READ_COM$
Purpose： To read data from a specified COM port.
Syntax： A$ = READ_COM$(N%)
Example： ON COM(1) GOSUB READ1
CLS
PRINT "==COM TEST=="
LOCATE 0,1
PRINT "ENT TO WRITE"
SET_COM(1,1,1,2,1)
OPEN_COM(1)
CLEAR_COM(1)
SET_RTS(1,1)
LOOP2:
IF INKEY$="" THEN
GOTO LOOP2
END IF
CLOSE_COM(1)
END
READ1:
A$=READ_COM$(1)
PRINT A$
RETURN
Description： A$ is a string variable to be assigned to the data.
N% is an integer variable indicating which COM port the
data is to be read (now we only can choose 1).
If the receiver buffer is empty, an empty string will be
returned.