791 lines
24 KiB
Plaintext
791 lines
24 KiB
Plaintext
unit WIN32COM;
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(*
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**
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** Serial and TCP/IP communication routines for DOS, OS/2 and Win9x/NT.
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** Tested with: TurboPascal v7.0, (DOS)
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** VirtualPascal v2.0, (OS/2, Win32)
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** FreePascal v0.99.15 (DOS, Win32)
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** Delphi v4.0. (Win32)
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**
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** Version : 1.01
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** Created : 21-May-1998
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** Last update : 20-Feb-2000
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**
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** Note: (c) 1998-2000 by Maarten Bekers
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**
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*)
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This unit is not supported anymore.
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Remove this in order to be compiled anyway. The next release of EleCOM will
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not include WIN32COM.PAS anymore. W32SNGL.PAS is the replacement unit.
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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INTERFACE
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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uses Windows, Combase, BufUnit, Threads
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{$IFDEF VirtualPascal}
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,Use32
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{$ENDIF};
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Const WriteTimeout = 20000; { Wait max. 20 secs }
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ReadTimeOut = 20000; { General event, 20 secs max }
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InBufSize = 1024 * 32;
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OutBufSize = 1024 * 32;
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type TWin32Obj = Object(TCommObj)
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ReadProcPtr: Pointer; { Pointer to TX/RX handler (thread) }
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WriteProcPtr: Pointer; { Pointer to TX/RX handler (thread) }
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ThreadsInitted: Boolean; { Are the thread(s) up and running? }
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SaveHandle : THandle;
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InitPortNr : Longint;
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InitHandle : Longint;
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ReadOL : TOverLapped; { Overlapped structure for ReadFile }
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WriteOL : TOverLapped; { Overlapped structure for WriteFile }
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InBuffer : ^BufArrayObj; { Buffer system internally used }
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OutBuffer : ^BufArrayObj;
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ReadEvent : PSysEventObj; { Event set by ReadFile overlapped routine }
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WriteEvent : PSysEventObj; { Event set by WriteFile overlapped routine }
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RecvEvent : PSysEventObj;
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DoTxEvent : PSysEventObj;{ Event manually set when we have to transmit }
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TxClosedEvent : PSysEventObj; { Event set when the Tx thread is closed }
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RxClosedEvent : PSysEventObj; { Event set when the Rx thread is closed }
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CriticalTx : PExclusiveObj; { Critical sections }
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CriticalRx : PExclusiveObj;
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TxThread : PThreadsObj; { The Transmit and Receive threads }
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RxThread : PThreadsObj;
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EndThreads : Boolean; { Set to true when we have to end the threads }
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constructor Init;
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destructor Done;
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function Com_Open(Comport: Byte; BaudRate: Longint; DataBits: Byte;
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Parity: Char; StopBits: Byte): Boolean; virtual;
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function Com_OpenKeep(Comport: Byte): Boolean; virtual;
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function Com_GetChar: Char; virtual;
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function Com_CharAvail: Boolean; virtual;
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function Com_Carrier: Boolean; virtual;
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function Com_SendChar(C: Char): Boolean; virtual;
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function Com_ReadyToSend(BlockLen: Longint): Boolean; virtual;
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function Com_GetBPSrate: Longint; virtual;
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function Com_GetHandle: Longint; virtual;
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procedure Com_OpenQuick(Handle: Longint); virtual;
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procedure Com_Close; virtual;
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procedure Com_SendBlock(var Block; BlockLen: Longint; var Written: Longint); virtual;
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procedure Com_ReadBlock(var Block; BlockLen: Longint; var Reads: Longint); virtual;
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procedure Com_GetBufferStatus(var InFree, OutFree, InUsed, OutUsed: Longint); virtual;
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procedure Com_SetDtr(State: Boolean); virtual;
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procedure Com_GetModemStatus(var LineStatus, ModemStatus: Byte); virtual;
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procedure Com_SetLine(BpsRate: longint; Parity: Char; DataBits, Stopbits: Byte); virtual;
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procedure Com_PurgeInBuffer; virtual;
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procedure Com_PurgeOutBuffer; virtual;
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procedure Com_PauseCom(CloseCom: Boolean); virtual;
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procedure Com_ResumeCom(OpenCom: Boolean); virtual;
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procedure Com_SetFlow(SoftTX, SoftRX, Hard: Boolean); virtual;
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procedure Com_SetDataProc(ReadPtr, WritePtr: Pointer); virtual;
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procedure Com_ReadProc(var TempPtr: Pointer);
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procedure Com_WriteProc(var TempPtr: Pointer);
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function Com_StartThread: Boolean;
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procedure Com_InitVars;
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procedure Com_StopThread;
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procedure Com_InitDelayTimes;
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end; { object TWin32Obj }
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type PWin32Obj = ^TWin32Obj;
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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IMPLEMENTATION
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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uses SysUtils;
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{$IFDEF FPC}
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{$I WINDEF.FPC}
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{$ENDIF}
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const
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dcb_Binary = $00000001;
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dcb_ParityCheck = $00000002;
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dcb_OutxCtsFlow = $00000004;
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dcb_OutxDsrFlow = $00000008;
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dcb_DtrControlMask = $00000030;
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dcb_DtrControlDisable = $00000000;
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dcb_DtrControlEnable = $00000010;
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dcb_DtrControlHandshake = $00000020;
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dcb_DsrSensivity = $00000040;
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dcb_TXContinueOnXoff = $00000080;
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dcb_OutX = $00000100;
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dcb_InX = $00000200;
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dcb_ErrorChar = $00000400;
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dcb_NullStrip = $00000800;
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dcb_RtsControlMask = $00003000;
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dcb_RtsControlDisable = $00000000;
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dcb_RtsControlEnable = $00001000;
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dcb_RtsControlHandshake = $00002000;
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dcb_RtsControlToggle = $00003000;
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dcb_AbortOnError = $00004000;
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dcb_Reserveds = $FFFF8000;
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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constructor TWin32Obj.Init;
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begin
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inherited Init;
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InitPortNr := -1;
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InitHandle := -1;
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ThreadsInitted := false;
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Com_InitVars;
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end; { constructor Init }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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destructor TWin32Obj.Done;
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begin
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inherited done;
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end; { destructor Done }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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procedure TWin32Obj.Com_ReadProc(var TempPtr: Pointer);
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var EventMask : DWORD;
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Success : Boolean;
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Props : TCommProp;
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ReturnCode: Longint;
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DidRead : DWORD;
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BlockLen : Longint;
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RecvOL : tOverlapped;
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begin
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New(RecvEvent, Init);
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if NOT RecvEvent^.CreateEvent(true) then EXIT;
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FillChar(RecvOL, SizeOf(tOverLapped), 0);
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RecvOL.hEvent := RecvEvent^.SemHandle;
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EventMask := EV_RXCHAR;
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SetCommMask(SaveHandle, EventMask); { Signal us if anything is received }
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repeat
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WaitCommEvent(SaveHandle, EventMask, @RecvOL);
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if EndThreads then EXIT;
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repeat
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ReturnCode := WaitForSingleObject(RecvOL.hEvent, 500);
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if ReturnCode = WAIT_OBJECT_0 then
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begin
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Success := true
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end { if }
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else Success := false;
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if EndThreads then BREAK;
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until (Success);
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DidRead := 00;
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if (NOT Success) OR (EventMask = 0) then EXIT;
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if (EndThreads) then EXIT;
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{----------------- Start reading the gathered date ---------------------}
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CriticalRx^.EnterExclusive;
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FillChar(Props, SizeOf(TCommProp), 0);
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if GetCommProperties(SaveHandle, Props) then
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if InBuffer^.BufRoom > 0 then
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begin
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BlockLen := Props.dwCurrentRxQueue;
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if BlockLen > InBuffer^.BufRoom then
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BlockLen := InBuffer^.BufRoom;
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Success := ReadFile(SaveHandle,
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InBuffer^.TmpBuf^,
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BlockLen,
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DidRead,
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@ReadOL);
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if NOT Success then
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begin
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ReturnCode := GetLastError;
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if ReturnCode = ERROR_IO_PENDING then
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begin
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ReturnCode := WaitForSingleObject(ReadOL.hEvent, ReadTimeOut);
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if ReturnCode = WAIT_OBJECT_0 then
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begin
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GetOverLappedResult(SaveHandle, ReadOL, DidRead, false);
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end; { if }
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end; { if }
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end
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else GetOverlappedResult(SaveHandle, ReadOL, DidRead, false);
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if DidRead > 00 then
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InBuffer^.Put(InBuffer^.TmpBuf^, DidRead);
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end; { if }
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CriticalRx^.LeaveExclusive;
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until EndThreads;
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RxClosedEvent^.SignalEvent;
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ExitThisThread;
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end; { proc. ComReadProc }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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procedure TWin32Obj.Com_WriteProc(var TempPtr: Pointer);
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var BlockLen : Longint;
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Written : DWORD;
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ReturnCode: Longint;
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Success : Boolean;
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begin
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repeat
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if DoTxEvent^.WaitForEvent(WriteTimeOut) then
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if NOT EndThreads then
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begin
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CriticalTx^.EnterExclusive;
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DoTxEvent^.ResetEvent;
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if OutBuffer^.BufUsed > 00 then
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begin
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Written := 00;
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BlockLen := OutBuffer^.Get(OutBuffer^.TmpBuf^, OutBuffer^.BufUsed, false);
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Success := WriteFile(SaveHandle,
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OutBuffer^.TmpBuf^,
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BlockLen,
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Written,
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@WriteOL);
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if NOT Success then
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begin
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ReturnCode := GetLastError;
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if ReturnCode = ERROR_IO_PENDING then
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begin
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ReturnCode := WaitForSingleObject(WriteOL.hEvent, WriteTimeOut);
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if ReturnCode = WAIT_OBJECT_0 then
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begin
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if GetOverLappedResult(SaveHandle, WriteOL, Written, false) then
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begin
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ResetEvent(WriteOL.hEvent);
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end; { if }
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end; { if }
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end; { result is pending }
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end { if }
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else begin
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if GetOverLappedResult(SaveHandle, WriteOL, Written, false) then
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begin
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ResetEvent(WriteOL.hEvent);
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end; { if }
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end; { if (did succeed) }
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ReturnCode := OutBuffer^.Get(OutBuffer^.TmpBuf^, Written, true);
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if Written <> BlockLen then
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DoTxEvent^.SignalEvent;
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end; { if }
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CriticalTx^.LeaveExclusive;
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end; { if }
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until EndThreads;
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TxClosedEvent^.SignalEvent;
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ExitThisThread;
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end; { proc. ComWriteProc }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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function TWin32Obj.Com_StartThread: Boolean;
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begin
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Result := false;
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EndThreads := false;
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if ThreadsInitted then EXIT;
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ThreadsInitted := true;
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{----------------------- Create all the events ----------------------------}
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New(ReadEvent, Init);
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if NOT ReadEvent^.CreateEvent(true) then EXIT;
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New(WriteEvent, Init);
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if NOT WriteEvent^.CreateEvent(true) then EXIT;
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New(DoTxEvent, Init);
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if NOT DoTxEvent^.CreateEvent(false) then EXIT;
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New(RxClosedEvent, Init);
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if NOT RxClosedEvent^.CreateEvent(false) then EXIT;
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New(TxClosedEvent, Init);
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if NOT TxClosedEvent^.CreateEvent(false) then EXIT;
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{-------------- Startup the buffers and overlapped events -----------------}
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FillChar(WriteOL, SizeOf(tOverLapped), 0);
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FillChar(ReadOL, SizeOf(tOverLapped), 0);
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WriteOl.hEvent := WriteEvent^.SemHandle;
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ReadOl.hEvent := ReadEvent^.SemHandle;
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New(InBuffer, Init(InBufSize));
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New(OutBuffer, Init(OutBufSize));
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if (InBuffer^.TxtArr=nil) OR (InBuffer^.TmpBuf=nil) then EXIT;
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if (OutBuffer^.TxtArr=nil) OR (OutBuffer^.TmpBuf=nil) then EXIT;
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{-------------------- Startup a seperate write thread ---------------------}
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New(CriticalTx, Init);
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CriticalTx^.CreateExclusive;
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New(TxThread, Init);
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if NOT TxThread^.CreateThread(16384, { Stack size }
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@WriteProcPtr, { Actual procedure }
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nil, { Parameters }
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0) { Creation flags }
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then EXIT;
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{-------------------- Startup a seperate read thread ----------------------}
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New(CriticalRx, Init);
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CriticalRx^.CreateExclusive;
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New(RxThread, Init);
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if NOT RxThread^.CreateThread(16384, { Stack size }
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@ReadProcPtr, { Actual procedure }
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nil, { Parameters }
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0) { Creation flags }
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then EXIT;
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Result := true;
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end; { proc. Com_StartThread }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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procedure TWin32Obj.Com_InitVars;
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begin
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DoTxEvent := nil;
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RxClosedEvent := nil;
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TxClosedEvent := nil;
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RecvEvent := nil;
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ReadEvent := nil;
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WriteEvent := nil;
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TxThread := nil;
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RxThread := nil;
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InBuffer := nil;
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OutBuffer := nil;
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CriticalRx := nil;
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CriticalTx := nil;
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end; { proc. Com_InitVars }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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procedure TWin32Obj.Com_StopThread;
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begin
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EndThreads := true;
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ThreadsInitted := false;
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if DoTxEvent <> nil then DoTxEvent^.SignalEvent;
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if TxThread <> nil then TxThread^.CloseThread;
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if RxThread <> nil then RxThread^.CloseThread;
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if TxClosedEvent <> nil then
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if NOT TxClosedEvent^.WaitForEvent(1000) then
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TxThread^.TerminateThread(0);
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if RxClosedEvent <> nil then
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if NOT RxClosedEvent^.WaitForEvent(1000) then
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RxThread^.TerminateThread(0);
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if TxThread <> nil then Dispose(TxThread, Done);
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if RxThread <> nil then Dispose(RxThread, Done);
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if DoTxEvent <> nil then Dispose(DoTxEvent, Done);
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if RxClosedEvent <> nil then Dispose(RxClosedEvent, Done);
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if TxClosedEvent <> nil then Dispose(TxClosedEvent, Done);
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if CriticalTx <> nil then Dispose(CriticalTx, Done);
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if CriticalRx <> nil then Dispose(CriticalRx, Done);
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if InBuffer <> nil then Dispose(InBuffer, Done);
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if OutBuffer <> nil then Dispose(OutBuffer, Done);
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if RecvEvent <> nil then Dispose(RecvEvent, Done);
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if ReadEvent <> nil then Dispose(ReadEvent, Done);
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if WriteEvent <> nil then Dispose(WriteEvent, Done);
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Com_InitVars;
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end; { proc. Com_StopThread }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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procedure TWin32Obj.Com_InitDelayTimes;
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var CommTimeOut: TCommTimeouts;
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RC : Longint;
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begin
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FillChar(CommTimeOut, SizeOf(TCommTimeOuts), 00);
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CommTimeOut.ReadIntervalTimeout := MAXDWORD;
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if NOT SetCommTimeOuts(SaveHandle, CommTimeOut) then
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begin
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RC := GetLastError;
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{ ErrorStr := 'Error setting communications timeout: #'+IntToStr(RC) + ' / ' + SysErrorMessage(rc)); }
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end; { if }
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end; { proc. InitDelayTimes }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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function TWin32Obj.Com_GetHandle: Longint;
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begin
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Result := SaveHandle;
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end; { func. Com_GetHandle }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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procedure TWin32Obj.Com_OpenQuick(Handle: Longint);
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var LastError: Longint;
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begin
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SaveHandle := Handle;
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InitHandle := Handle;
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FillChar(ReadOl, SizeOf(ReadOl), 00);
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FillChar(WriteOl, SizeOf(WriteOl), 00);
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Com_InitDelayTimes;
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if NOT SetupComm(Com_GetHandle, 1024, 1024) then
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begin
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LastError := GetLastError;
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{ ErrorStr := 'Error setting up communications buffer: #'+IntToStr(LastError) + ' / '+SysErrorMessage(LastError); }
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end; { if }
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InitFailed := NOT Com_StartThread;
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Com_SetLine(-1, 'N', 8, 1);
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end; { proc. TWin32Obj.Com_OpenQuick }
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(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
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function TWin32Obj.Com_OpenKeep(Comport: Byte): Boolean;
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var TempSave : THandle;
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Security : TSECURITYATTRIBUTES;
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LastError : Longint;
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begin
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InitPortNr := Comport;
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FillChar(ReadOl, SizeOf(ReadOl), 00);
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FillChar(WriteOl, SizeOf(WriteOl), 00);
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FillChar(Security, SizeOf(TSECURITYATTRIBUTES), 0);
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Security.nLength := SizeOf(TSECURITYATTRIBUTES);
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Security.lpSecurityDescriptor := nil;
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Security.bInheritHandle := true;
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TempSave := CreateFile(PChar('\\.\COM' + IntToStr(ComPort)),
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GENERIC_READ or GENERIC_WRITE,
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0,
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@Security, { No Security }
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OPEN_EXISTING, { Creation action }
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FILE_ATTRIBUTE_NORMAL or FILE_FLAG_OVERLAPPED,
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0); { No template }
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LastError := GetLastError;
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if LastError <> 0 then
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ErrorStr := 'Unable to open communications port';
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SaveHandle := TempSave;
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Result := (TempSave <> INVALID_HANDLE_VALUE);
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if Result then { Make sure that "CharAvail" isn't going to wait }
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begin
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Com_InitDelayTimes;
|
|
end; { if }
|
|
|
|
if NOT SetupComm(Com_GetHandle, 1024, 1024) then
|
|
begin
|
|
LastError := GetLastError;
|
|
|
|
{ ErrorStr := 'Error setting up communications buffer: #'+IntToStr(LastError) + ' / '+SysErrorMessage(LastError); }
|
|
end; { if }
|
|
|
|
InitFailed := NOT Com_StartThread;
|
|
end; { func. Com_OpenKeep }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_Open(Comport: Byte; BaudRate: Longint; DataBits: Byte;
|
|
Parity: Char; StopBits: Byte): Boolean;
|
|
begin
|
|
Com_Open := Com_OpenKeep(Comport);
|
|
Com_SetLine(Baudrate, Parity, DataBits, StopBits);
|
|
end; { func. TWin32Obj.Com_OpenCom }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_SetLine(BpsRate: longint; Parity: Char; DataBits, Stopbits: Byte);
|
|
var DCB : TDCB;
|
|
BPSID : Longint;
|
|
begin
|
|
if BpsRate = 11520 then
|
|
BpsRate := 115200;
|
|
|
|
GetCommState(Com_GetHandle, DCB);
|
|
|
|
if NOT (Parity in ['N', 'E', 'O', 'M']) then Parity := 'N';
|
|
if BpsRate >= 0 then dcb.BaudRate := BpsRate;
|
|
dcb.StopBits := ONESTOPBIT;
|
|
|
|
Case Parity of
|
|
'N' : dcb.Parity := NOPARITY;
|
|
'E' : dcb.Parity := EVENPARITY;
|
|
'O' : dcb.Parity := ODDPARITY;
|
|
'M' : dcb.Parity := MARKPARITY;
|
|
end; { case }
|
|
|
|
if StopBits = 1 then
|
|
dcb.StopBits := ONESTOPBIT;
|
|
dcb.ByteSize := DataBits;
|
|
dcb.Flags := dcb.Flags OR dcb_Binary or Dcb_DtrControlEnable;
|
|
|
|
if not SetCommState (Com_GetHandle, DCB) then
|
|
begin
|
|
BPSId := GetLastError;
|
|
|
|
{ ErrorStr := 'Error setting up communications parameters: #'+IntToStr(BpsId) + ' / '+SysErrorMessage(BpsId); }
|
|
end; { if }
|
|
end; { proc. TWin32Obj.Com_SetLine }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_Close;
|
|
begin
|
|
if DontClose then EXIT;
|
|
|
|
if Com_GetHandle <> INVALID_HANDLE_VALUE then
|
|
begin
|
|
Com_StopThread;
|
|
CloseHandle(Com_GetHandle);
|
|
|
|
SaveHandle := INVALID_HANDLE_VALUE;
|
|
end;
|
|
|
|
end; { func. TWin32Obj.Com_CloseCom }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_SendChar(C: Char): Boolean;
|
|
var Written: Longint;
|
|
begin
|
|
Com_SendBlock(C, SizeOf(C), Written);
|
|
Com_SendChar := (Written = SizeOf(c));
|
|
end; { proc. TWin32Obj.Com_SendChar }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_GetChar: Char;
|
|
var Reads: Longint;
|
|
begin
|
|
Com_ReadBlock(Result, SizeOf(Result), Reads);
|
|
end; { func. TWin32Obj.Com_GetChar }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_SendBlock(var Block; BlockLen: Longint; var Written: Longint);
|
|
begin
|
|
if OutBuffer^.BufRoom < BlockLen then
|
|
repeat
|
|
{$IFDEF WIN32}
|
|
Sleep(1);
|
|
{$ENDIF}
|
|
|
|
{$IFDEF OS2}
|
|
DosSleep(1);
|
|
{$ENDIF}
|
|
until (OutBuffer^.BufRoom >= BlockLen) OR (NOT Com_Carrier);
|
|
|
|
CriticalTx^.EnterExclusive;
|
|
Written := OutBuffer^.Put(Block, BlockLen);
|
|
CriticalTx^.LeaveExclusive;
|
|
|
|
DoTxEvent^.SignalEvent;
|
|
end; { proc. TWin32Obj.Com_SendBlock }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_ReadBlock(var Block; BlockLen: Longint; var Reads: Longint);
|
|
begin
|
|
if InBuffer^.BufUsed < BlockLen then
|
|
begin
|
|
repeat
|
|
Sleep(1);
|
|
until (InBuffer^.BufUsed >= BlockLen) OR (NOT Com_Carrier);
|
|
end; { if }
|
|
|
|
CriticalRx^.EnterExclusive;
|
|
Reads := InBuffer^.Get(Block, BlockLen, true);
|
|
CriticalRx^.LeaveExclusive;
|
|
end; { proc. TWin32Obj.Com_ReadBlock }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_CharAvail: Boolean;
|
|
begin
|
|
Result := (InBuffer^.BufUsed > 0);
|
|
end; { func. TWin32Obj.Com_CharAvail }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_Carrier: Boolean;
|
|
var Status: DWORD;
|
|
begin
|
|
GetCommModemStatus(Com_GetHandle,
|
|
Status);
|
|
|
|
Result := (Status AND MS_RLSD_ON) <> 00;
|
|
end; { func. TWin32Obj.Com_Carrier }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_GetModemStatus(var LineStatus, ModemStatus: Byte);
|
|
var Data: DWORD;
|
|
begin
|
|
GetCommModemStatus(Com_GetHandle, Data);
|
|
|
|
ModemStatus := ModemStatus and $0F;
|
|
ModemStatus := ModemStatus or Byte(Data);
|
|
end; { proc. TWin32Obj.Com_GetModemStatus }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_SetDtr(State: Boolean);
|
|
begin
|
|
if State then
|
|
EscapeCommFunction(Com_GetHandle, SETDTR)
|
|
else EscapeCommFunction(Com_GetHandle, CLRDTR);
|
|
end; { proc. TWin32Obj.Com_SetDtr }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_GetBpsRate: Longint;
|
|
var DCB : TDCB;
|
|
BPSID : Longint;
|
|
begin
|
|
GetCommState(Com_GetHandle, DCB);
|
|
|
|
Com_GetBpsRate := dcb.Baudrate;
|
|
end; { func. TWin32Obj.Com_GetBpsRate }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_GetBufferStatus(var InFree, OutFree, InUsed, OutUsed: Longint);
|
|
begin
|
|
InFree := InBuffer^.BufRoom;
|
|
OutFree := OutBuffer^.BufRoom;
|
|
InUsed := InBuffer^.BufUsed;
|
|
OutUsed := OutBuffer^.BufUsed;
|
|
end; { proc. TWin32Obj.Com_GetBufferStatus }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_PurgeInBuffer;
|
|
begin
|
|
CriticalRx^.EnterExclusive;
|
|
|
|
InBuffer^.Clear;
|
|
PurgeComm(Com_GetHandle, PURGE_RXCLEAR);
|
|
|
|
CriticalRx^.LeaveExclusive;
|
|
end; { proc. TWin32Obj.Com_PurgeInBuffer }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_PurgeOutBuffer;
|
|
begin
|
|
CriticalTx^.EnterExclusive;
|
|
|
|
OutBuffer^.Clear;
|
|
PurgeComm(Com_GetHandle, PURGE_TXCLEAR);
|
|
|
|
CriticalTx^.LeaveExclusive;
|
|
end; { proc. TWin32Obj.Com_PurgeInBuffer }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
function TWin32Obj.Com_ReadyToSend(BlockLen: Longint): Boolean;
|
|
begin
|
|
Result := OutBuffer^.BufRoom >= BlockLen;
|
|
end; { func. ReadyToSend }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_PauseCom(CloseCom: Boolean);
|
|
begin
|
|
if CloseCom then Com_Close
|
|
else Com_StopThread;
|
|
end; { proc. Com_PauseCom }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_ResumeCom(OpenCom: Boolean);
|
|
begin
|
|
if OpenCom then
|
|
begin
|
|
if InitPortNr <> -1 then Com_OpenKeep(InitPortNr)
|
|
else Com_OpenQuick(InitHandle);
|
|
end
|
|
else InitFailed := NOT Com_StartThread;
|
|
end; { proc. Com_ResumeCom }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_SetFlow(SoftTX, SoftRX, Hard: Boolean);
|
|
var DCB : TDCB;
|
|
BPSID : Longint;
|
|
begin
|
|
GetCommState(Com_GetHandle, DCB);
|
|
|
|
if Hard then
|
|
dcb.Flags := dcb.Flags OR dcb_OutxCtsFlow OR dcb_RtsControlHandshake;
|
|
|
|
if SoftTX then
|
|
dcb.Flags := dcb.Flags OR dcb_OutX;
|
|
|
|
if SoftRX then
|
|
dcb.Flags := dcb.Flags OR dcb_InX;
|
|
|
|
if not SetCommState (Com_GetHandle, DCB) then
|
|
begin
|
|
BPSId := GetLastError;
|
|
|
|
{ ErrorStr := 'Error setting up communications parameters: #'+IntToStr(BpsId) + ' / '+SysErrorMessage(BpsId); }
|
|
end; { if }
|
|
end; { proc. Com_SetFlow }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
procedure TWin32Obj.Com_SetDataProc(ReadPtr, WritePtr: Pointer);
|
|
begin
|
|
ReadProcPtr := ReadPtr;
|
|
WriteProcPtr := WritePtr;
|
|
end; { proc. Com_SetDataProc }
|
|
|
|
(*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-+-*-*)
|
|
|
|
end.
|