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RS232.Mod
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RS232.Mod
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MODULE RS232; (*NW 3.1.2012*)
IMPORT SYSTEM;
CONST data = -56; stat = -52;
PROCEDURE Send*(x: INTEGER);
BEGIN
REPEAT UNTIL SYSTEM.BIT(stat, 1);
SYSTEM.PUT(data, x)
END Send;
PROCEDURE Rec*(VAR x: INTEGER);
BEGIN
REPEAT UNTIL SYSTEM.BIT(stat, 0);
SYSTEM.GET(data, x)
END Rec;
PROCEDURE SendInt*(x: INTEGER);
VAR i: INTEGER;
BEGIN Send(1); i := 4;
REPEAT i := i-1; Send(x); x := ROR(x, 8) UNTIL i = 0
END SendInt;
PROCEDURE SendHex*(x: INTEGER);
VAR i: INTEGER;
BEGIN Send(2); i := 4;
REPEAT i := i-1; Send(x); x := ROR(x, 8) UNTIL i = 0
END SendHex;
PROCEDURE SendReal*(x: REAL);
VAR i, u: INTEGER;
BEGIN Send(3); u := ORD(x); i := 4;
REPEAT i := i-1; Send(u); u := ROR(u, 8) UNTIL i = 0
END SendReal;
PROCEDURE SendStr*(x: ARRAY OF CHAR);
VAR i, k: INTEGER;
BEGIN Send(4); i := 0;
REPEAT k := ORD(x[i]); Send(k); INC(i) UNTIL k = 0
END SendStr;
PROCEDURE RecInt*(VAR x: INTEGER);
VAR i, x0, y: INTEGER;
BEGIN i := 4; x0 := 0;
REPEAT i := i-1; Rec(y); x0 := ROR(x0+y, 8) UNTIL i = 0;
x := x0
END RecInt;
PROCEDURE RecReal*(VAR x: REAL);
VAR i, x0, y: INTEGER;
BEGIN i := 4; x0 := 0;
REPEAT i := i-1; Rec(y); x0 := ROR(x0+y, 8) UNTIL i = 0;
x := SYSTEM.VAL(REAL, x0)
END RecReal;
PROCEDURE RecStr*(VAR x: ARRAY OF CHAR);
VAR i, k: INTEGER;
BEGIN i := 0;
REPEAT Rec(k); x[i] := CHR(k); INC(i) UNTIL k = 0
END RecStr;
PROCEDURE Line*;
BEGIN Send(6)
END Line;
PROCEDURE End*;
BEGIN Send(7)
END End;
BEGIN END RS232.