1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:
90:
91:
92:
93:
94:
95:
96:
97:
98:
99:
100:
101:
102:
103:
104:
105:
106:
107:
108:
109:
110:
111:
112:
113:
114:
115:
116:
117:
118:
119:
120:
121:
122:
123:
124:
125:
126:
127:
128:
129:
130:
131:
132:
133:
134:
135:
136:
137:
138:
139:
140:
141:
142:
143:
144:
145:
146:
147:
148:
149:
150:
151:
152:
153:
154:
155:
156:
157:
158:
159:
160:
161:
162:
163:
164:
165:
166:
167:
168:
169:
170:
171:
172:
173:
174:
175:
176:
177:
178:
179:
180:
181:
182:
183:
184:
185:
186:
187:
188:
189:
190:
191:
192:
193:
194:
195:
196:
197:
198:
199:
200:
201:
202:
203:
204:
205:
206:
207:
208:
209:
210:
211:
212:
213:
214:
215:
216:
217:
218:
219:
220:
221:
222:
223:
224:
225:
226:
227:
228:
229:
230:
231:
232:
233:
234:
235:
236:
237:
238:
239:
240:
241:
242:
243:
244:
245:
246:
247:
248:
249:
250:
251:
252:
253:
254:
255:
256:
257:
258:
259:
260:
261:
262:
263:
264:
| program com5test;
uses
Forms,
main in 'main.pas' ;
{$R *.res}
begin
Application.Initialize;
Application.CreateForm(TForm1, Form1);
Application.Run;
end.
--------------
unit main;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
Button8: TButton;
Button9: TButton;
Button10: TButton;
Button11: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure Button6Click(Sender: TObject);
procedure Button7Click(Sender: TObject);
procedure Button8Click(Sender: TObject);
procedure Button9Click(Sender: TObject);
procedure Button10Click(Sender: TObject);
procedure Button11Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
public
end;
var
Form1: TForm1;
PortTimeout : _COMMTIMEOUTS;
PortHandle : Integer;
PortDCB : TDCB;
PortNr : Integer;
PortState : Cardinal;
WriteOverlapped,ReadOverlapped,StatusOs: TOverlapped;
implementation
{$R *.dfm}
Uses SetupAPI;
procedure InitOverlapped(var Overlapped : TOverlapped);
begin
Overlapped.Offset := 0;
Overlapped.OffsetHigh := 0;
Overlapped.Internal := 0;
Overlapped.InternalHigh := 0;
Overlapped.hEvent := CreateEvent(nil,True,False,'');
procedure TForm1.Button10Click(Sender: TObject);
begin
SetCommMask(PortHandle,0);
end;
procedure TForm1.Button11Click(Sender: TObject);
begin
type
TSerialThread = class(TThread)
protected
fComEvent: cardinal;
procedure Execute; override;
public
constructor Create;
property ComEvent: cardinal read fComEvent;
end;
constructor TSerialThread.Create;
begin
FreeOnTerminate:= True;
inherited Create(False);
end;
procedure TSerialThread.Execute;
var
SerialEvent, WaitResult, BytesRead: Cardinal;
begin
SetCommMask(PortHandle,EV_CTS or EV_BREAK or EV_DSR or
EV_ERR or EV_RING or EV_RLSD or EV_RXCHAR or EV_RXFLAG or EV_TXEMPTY);
if not WaitCommEvent(PortHandle,SerialEvent,@StatusOs) then
begin
if (GetLastError = ERROR_IO_PENDING) then
begin
WaitResult := WaitForSingleObject(StatusOs.hEvent,INFINITE);
case WaitResult of
WAIT_OBJECT_0:
begin
if GetOverlappedResult(PortHandle,StatusOs,BytesRead,false) then
ReleaseEvent(SerialEvent);
end;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
end;
end else ReleaseEvent(SerialEvent);
procedure TForm1.Button1Click(Sender: TObject);
begin
function OpenCOM(Port: byte): boolean; stdcall;
PortHandle :=
CreateFile(PChar('\\.\COM'+IntToStr(Port)),GENERIC_READ or GENERIC_WRITE,0,
nil,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,LongInt(0));
if PortHandle > 0 then
begin
Result := true;
InitOverlapped(WriteOverlapped);
InitOverlapped(ReadOverlapped);
InitOverlapped(StatusOs);
end else Result := false;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
procedure CloseCOM; stdcall;
PurgeComm(PortHandle, PURGE_RXABORT or PURGE_RXCLEAR or PURGE_TXABORT or PURGE_TXCLEAR);
SetCommMask(PortHandle,0); CloseHandle(PortHandle);
PortHandle := 0;
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
function ComAvailable(ComNr: byte): boolean; stdcall;
var
TestHandle : integer;
TestHandle :=
CreateFile(PChar('\\.\COM'+IntToStr(ComNr)),GENERIC_READ or GENERIC_WRITE,0,
nil,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,LongInt(0));
if (TestHandle <= 0) then
Result := false
else
begin
Result := true;
CloseHandle(TestHandle);
end;
end;
procedure TForm1.Button4Click(Sender: TObject);
begin
function SetBaudRate(baud: cardinal): boolean; stdcall;
GetCommState(PortHandle,PortDCB);
PortDCB.BaudRate := baud;
Result := SetCommState(PortHandle,PortDCB);
end;
procedure TForm1.Button5Click(Sender: TObject);
begin
var PortState: cardinal;
GetCommModemStatus(PortHandle,PortState); if ((Portstate and MS_CTS_ON) <> 0) then Result := true
else Result := false;
end;
procedure TForm1.Button6Click(Sender: TObject);
begin
procedure SetDTR; stdcall;
if (PortHandle <> 0) then EscapeCommFunction(PortHandle,5);
end;
procedure TForm1.Button7Click(Sender: TObject);
begin
procedure ClearDTR; stdcall;
if (PortHandle <> 0) then EscapeCommFunction(PortHandle,CLRDTR);
end;
procedure TForm1.Button8Click(Sender: TObject);
begin
function SendString(Str: PChar): boolean; stdcall;
var
written : cardinal;
tmpStr : string;
i: LongBool;
begin
if (PortHandle <> 0) then
begin
tmpStr := string(Str);
Result := not WriteFile(PortHandle,tmpStr[1],Length(tmpStr),written,@WriteOverlapped);
end;
end;
end;
procedure TForm1.Button9Click(Sender: TObject);
begin
function ReadString(var Buf: PChar): Cardinal; stdcall;
var
StrBuf: string;
Error,BytesRead: DWORD;
Status: TComStat;
RdSuccess: boolean;
begin
BytesRead := 0;
if (PortHandle <> -1) then
begin
ClearCommError(PortHandle,Error,@Status);
case Error of
CE_BREAK,CE_DNS,CE_FRAME,CE_IOE,CE_MODE,CE_OOP,CE_OVERRUN,CE_PTO,CE_RXOVER,
CE_RXPARITY,CE_TXFULL:
begin
BytesRead := 0;
end
else
begin
SetLength(StrBuf,Status.cbInQue);
RdSuccess := ReadFile(PortHandle,StrBuf[1],Status.cbInQue,BytesRead,@ReadOverlapped);
if not RdSuccess then BytesRead := 0;
end;
end;
end;
if (BytesRead > 0) then
begin
Result := BytesRead;
try
StrPCopy(Buf,StrBuf);
except
Result := 0;
end;
end else Result := 0;
end. |
Christian S.: Topic aus Delphi Tutorials verschoben am Mi 05.10.2011 um 09:40
