delphi 一个自动控制机的硅控板检测程序，用多线程和API,没有用控件，少做改动就能用 用485开发
一个自动控制机的硅控板检测程序，用多线程和API,没有用控件，少做改动就能用
Unit CommThread;
Interface
Uses
Windows, Classes, SysUtils, Graphics, Controls, Forms,
Dialogs, ComCtrls, ExtCtrls;
Type
TThreadParam = Record
SusPended: Boolean;
BaulSpeed: integer;
Port: Byte;
Parity: Boolean;
StopBit: byte;
StartBit: Byte;
SB: TStatusBar;
LEDs: Array[0..24] Of TShape;
End;
Type
TReadThread = Class(TThread)
Private
{ Private declarations }
hComm: THandle;
Port: integer;
FErr: Boolean;
FPortDescription: String;
FShape: Array[0..24] Of TShape;
FSB: TStatusBar;
cc: TCOMMCONFIG;
Data: String;
Procedure ReadPort; //读取串行端口数据
Procedure UpdateUI;
Protected
Procedure Execute; Override;
Public
Constructor Create(ThdPrm: TThreadParam);
End;
Implementation
//uses Unit1; // 声明引用Unit1，必须放在implementation区段
Constructor TReadThread.Create(ThdPrm: TThreadParam);
Var
i: integer;
Begin
Port := thdprm.Port;
FSB := thdprm.SB;
For i := 0 To 24 Do
Begin
FShape[i] := thdPrm.LEDs[i];
End;
FreeOnTerminate := True;
Inherited Create(ThdPrm.SusPended);
End;
Procedure TReadThread.Execute;
Var
PortToOpen: String;
Begin
PortToOpen := 'COM' + inttostr(Port); // 选择所要打开的COM
hComm := CreateFile(PChar(PortToOpen), GENERIC_READ Or GENERIC_WRITE,
0, Nil, OPEN_EXISTING, 0, 0); // 打开COM
If (hComm = INVALID_HANDLE_VALUE) Then
Begin //如果COM 未打开
FErr := True;
FPortDescription := '打开端口错误!';
End
Else
Begin
FErr := False;
FPortDescription := '打开端口成功';
GetCommState(hComm, cc.dcb); // 得知目前COM 的状态
cc.dcb.BaudRate := CBR_9600; // 设置波特率为9600
cc.dcb.ByteSize := 8; //字节为 8 bit
cc.dcb.Parity := NOPARITY; // Parity 为 None
cc.dcb.StopBits := ONESTOPBIT; // 1 个Stop bit
If Not SetCommState(hComm, cc.dcb) Then
Begin // 设置COM 的状态
Ferr := True;
FPortDescription := FPortDescription + '，设置错误!';
CloseHandle(hComm); //关闭通信端口
End
Else
Begin
FErr := False;
FPortDescription := FPortDescription + '，设置成功';
While Not Terminated Do
Begin
Synchronize(ReadPort); //刚才所定义的读取数据函数
End;
Synchronize(UpdateUI);
End;
End;
End;
Procedure TReadThread.ReadPort;
Var
i: integer;
inbuff: Array[0..29] Of Char;
nBytesRead, dwEvent, dwError: LongWORD;
cs: TCOMSTAT;
Rights, Emptys, Errs: integer;
Const
RightColor = clBlue;
ErrorColor = clRed;
EmptyColor = clWhite;
Begin
Rights := 0;
Emptys := 0;
Errs := 0;
If (hComm = INVALID_HANDLE_VALUE) Then
Begin
Fsb.Panels[3].Text := FPortDescription;
Terminate; //先判断是否已打开通信端口
Exit;
End
Else
Begin
Fsb.Panels[3].Text := FPortDescription;
ClearCommError(hComm, dwError, @CS); //取得状态
ReadFile(hComm, inbuff, cs.cbInQue, nBytesRead, Nil); // 接收COM 的数据
//串行在读取数据后，会自动将缓冲区中已被读取的数据清除掉
If cs.cbInQue = 0 Then exit;
// 数据是否大于我们所准备的Buffer
If cs.cbInQue <> sizeof(inbuff) Then
Begin
PurgeComm(hComm, PURGE_RXCLEAR); // 清除COM 数据
exit;
End;
Data := Copy(inbuff, 1, cs.cbInQue); //取出数据
For i := 1 To 25 Do
Begin
If (UpperCase(Data[i]) = 'Y') Then
Begin
FShape[i].Brush.Color := RightColor;
Rights := Rights + 1;
End
Else
If (UpperCase(Data[i]) = 'N') Then
Begin
FShape[i].Brush.Color := EmptyColor;
Emptys := Emptys + 1;
End
Else
If (UpperCase(Data[i]) = 'E') Then
Begin
FShape[i].Brush.Color := ErrorColor;
Errs := Errs + 1;
End;
End;
Fsb.Panels[0].Text := '正确:' + IntTostr(Rights);
fsb.Panels[1].Text := '空槽:' + IntTostr(Emptys);
fsb.Panels[2].Text := '错误:' + IntTostr(Errs);
Fsb.Panels[3].Text := FPortDescription;
Fsb.Panels[4].Text := '数据:' + Data;
End;
End;
Procedure TReadThread.UpdateUI;
Begin
Fsb.Panels[0].Text := '正确:' + IntTostr(0);
fsb.Panels[1].Text := '空槽:' + IntTostr(0);
fsb.Panels[2].Text := '错误:' + IntTostr(0);
Fsb.Panels[3].Text := '';
Fsb.Panels[4].Text := '数据:' + Data;
End;
End.