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unit ULCD;
interface
type
TLCD = class
private
Enabled: boolean;
Text: array[1..6] of string;
StartPos: integer;
LineBR: integer;
Position: integer;
procedure WriteCommand(B: byte);
procedure WriteData(B: byte);
procedure WriteString(S: string);
public
HalfInterface: boolean;
constructor Create;
procedure Enable;
procedure Clear;
procedure WriteText(Line: integer; S: string);
procedure MoveCursor(Line, Pos: integer);
procedure ShowCursor;
procedure HideCursor;
// for 2x16
procedure AddTextBR(S: string);
procedure MoveCursorBR(Pos: integer);
procedure ScrollUpBR;
procedure AddTextArray(Line:integer; S: string);
end;
var
LCD: TLCD;
const
Data = $378; // domy�lny adres portu
Status = Data + 1;
Control = Data + 2;
implementation
uses
SysUtils,
zlportio,
UTime;
procedure TLCD.WriteCommand(B: Byte);
// Wysylanie komend sterujacych
begin
if not HalfInterface then begin
zlioportwrite(Control, 0, $02);
zlioportwrite(Data, 0, B);
zlioportwrite(Control, 0, $03);
end else begin
zlioportwrite(Control, 0, $02);
zlioportwrite(Data, 0, B and $F0);
zlioportwrite(Control, 0, $03);
TimeSleep(0.1);
zlioportwrite(Control, 0, $02);
zlioportwrite(Data, 0, (B * 16) and $F0);
zlioportwrite(Control, 0, $03);
end;
if (B=1) or (B=2) then
Sleep(2)
else
TimeSleep(0.1);
end;
procedure TLCD.WriteData(B: Byte);
// Wysylanie danych
begin
if not HalfInterface then begin
zlioportwrite(Control, 0, $06);
zlioportwrite(Data, 0, B);
zlioportwrite(Control, 0, $07);
end else begin
zlioportwrite(Control, 0, $06);
zlioportwrite(Data, 0, B and $F0);
zlioportwrite(Control, 0, $07);
TimeSleep(0.1);
zlioportwrite(Control, 0, $06);
zlioportwrite(Data, 0, (B * 16) and $F0);
zlioportwrite(Control, 0, $07);
end;
TimeSleep(0.1);
Inc(Position);
end;
procedure TLCD.WriteString(S: string);
// Wysylanie slow
var
I: integer;
begin
for I := 1 to Length(S) do
WriteData(Ord(S[I]));
end;
constructor TLCD.Create;
begin
//
end;
procedure TLCD.Enable;
var
A: byte;
B: byte;
begin
Enabled := true;
if not HalfInterface then
WriteCommand($38)
else begin
WriteCommand($33);
WriteCommand($32);
WriteCommand($28);
end;
// WriteCommand($06);
// WriteCommand($0C);
// sleep(10);
end;
procedure TLCD.Clear;
begin
if Enabled then begin
WriteCommand(1);
WriteCommand(2);
Text[1] := '';
Text[2] := '';
Text[3] := '';
Text[4] := '';
Text[5] := '';
Text[6] := '';
StartPos := 1;
LineBR := 1;
end;
end;
procedure TLCD.WriteText(Line: integer; S: string);
begin
if Enabled then begin
if Line <= 2 then begin
MoveCursor(Line, 1);
WriteString(S);
end;
Text[Line] := '';
AddTextArray(Line, S);
end;
end;
procedure TLCD.MoveCursor(Line, Pos: integer);
var
I: integer;
begin
if Enabled then begin
Pos := Pos + (Line-1) * 40;
if Position > Pos then begin
WriteCommand(2);
for I := 1 to Pos-1 do
WriteCommand(20);
end;
if Position < Pos then
for I := 1 to Pos - Position do
WriteCommand(20);
Position := Pos;
end;
end;
procedure TLCD.ShowCursor;
begin
if Enabled then begin
WriteCommand(14);
end;
end;
procedure TLCD.HideCursor;
begin
if Enabled then begin
WriteCommand(12);
end;
end;
procedure TLCD.AddTextBR(S: string);
var
Word: string;
W: integer;
P: integer;
L: integer;
begin
if Enabled then begin
if LineBR <= 6 then begin
L := LineBR;
P := Pos(' ', S);
if L <= 2 then
MoveCursor(L, 1);
while (L <= 6) and (P > 0) do begin
Word := Copy(S, 1, P);
if (Length(Text[L]) + Length(Word)-1) > 16 then begin
L := L + 1;
if L <= 2 then
MoveCursor(L, 1);
end;
if L <= 6 then begin
if L <= 2 then
WriteString(Word);
AddTextArray(L, Word);
end;
Delete(S, 1, P);
P := Pos(' ', S)
end;
LineBR := L + 1;
end;
end;
end;
procedure TLCD.MoveCursorBR(Pos: integer);
var
I: integer;
L: integer;
begin
if Enabled then begin
Pos := Pos - (StartPos-1);
if Pos <= Length(Text[1]) then
MoveCursor(1, Pos);
if Pos > Length(Text[1]) then begin
// bez zawijania
// Pos := Pos - Length(Text[1]);
// MoveCursor(2, Pos);
// z zawijaniem
Pos := Pos - Length(Text[1]);
ScrollUpBR;
MoveCursor(1, Pos);
end;
end;
end;
procedure TLCD.ScrollUpBR;
var
T: array[1..5] of string;
SP: integer;
LBR: integer;
begin
if Enabled then begin
T[1] := Text[2];
T[2] := Text[3];
T[3] := Text[4];
T[4] := Text[5];
T[5] := Text[6];
SP := StartPos + Length(Text[1]);
LBR := LineBR;
Clear;
StartPos := SP;
WriteText(1, T[1]);
WriteText(2, T[2]);
WriteText(3, T[3]);
WriteText(4, T[4]);
WriteText(5, T[5]);
LineBR := LBR-1;
end;
end;
procedure TLCD.AddTextArray(Line: integer; S: string);
begin
if Enabled then begin
Text[Line] := Text[Line] + S;
end;
end;
end.
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