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Anfängerfrage zu DLL

Ein Thema von iphi · begonnen am 18. Jan 2010 · letzter Beitrag vom 25. Jan 2010
Antwort Antwort
Wal

Registriert seit: 22. Sep 2006
57 Beiträge
 
#1

Re: Anfängerfrage zu DLL

  Alt 25. Jan 2010, 06:04
Hatte mal eine Ansteuerung für ein USBRadio(jvhidkompo) mit Callbackfunktion in eine Dll umgesetzt, evtl. kann es für dich nützlich sein.
Die Ansteuerung war nicht von mir, nur die Dll-Umsetzung.

Das Laden der Dll und Auswerten des Callback ging so:

Delphi-Quellcode:
unit RadioDllWrapper;

interface

uses Windows, StrUtils, IniFiles;

type
  TFNInitRadio = procedure(strPath: PChar); stdcall;
  TFNCloseRadio = procedure; stdcall;
  TFNSetRadioFrequenz = procedure(Value: Integer; Tuner: Boolean); stdcall;
  TFNSetRadioIntervall = procedure(Value: Integer); stdcall;
  TFNScanRadio = procedure(direction: Boolean; Tuner: Boolean); stdcall;
  TFNSeekRadio = procedure(direction: Boolean; Tuner: Boolean); stdcall;
  TFNSetRadioVolume = procedure(Value: Integer); stdcall;
  TFNSetRadioBass = procedure(Value: Integer); stdcall;
  TFNSetRadioTreble = procedure(Value: Integer); stdcall;
  TFNSetRadioLoudnessOn = procedure(Value: Boolean); stdcall;
  TFNSetRadioLoudnessStep = procedure(Value: Boolean); stdcall;
  TFNSetRadioVolumeStep = procedure(Value: Boolean); stdcall;
  TFNSetRadioFaderStep = procedure(Value: Boolean); stdcall;
  TFNSetRadioBalanceStep = procedure(Value: Boolean); stdcall;
  TFNSetRadioBassStep = procedure(Value: Boolean); stdcall;
  TFNSetRadioTrebleStep = procedure(Value: Boolean); stdcall;
  TFNSetRadioMute = procedure(Value: Boolean); stdcall;
  TFNSetRadioRemote = procedure(Value: Boolean); stdcall;
  TFNSetRadioLoudness = procedure(Value: Integer); stdcall;
  TFNSetRadioBalance = procedure(Value: Integer); stdcall;
  TFNSetRadioFader = procedure(Value: Integer); stdcall;
  TFNSetRadioAntenne = procedure(Tuner: Boolean; Antenne: Boolean); stdcall;
  TFNSetRadioAFOn = procedure(Value: Boolean); stdcall;
  TFNSaveRadioValue = procedure; stdcall;
  TFNRadioCallBack = procedure(Value: Pointer); stdcall;

  function LoadRadioDll: Boolean;
  function CloseRadioDll: Boolean;

  //Dll-Callback
  procedure RCallBack(Index: Integer; Data: PChar; IntData: Integer);

const
  RADIO_CLOSE = 0;
  RADIO_OPEN = 1;
  RADIO_FRQ1 = 2;
  RADIO_FRQ2 = 3;
  RADIO_PI1 = 4;
  RADIO_PI2 = 5;
  RADIO_FS1 = 6;
  RADIO_FS2 = 7;
  RADIO_RDSNAME1 = 8;
  RADIO_RDSNAME2 = 9;
  RADIO_RDSTEXT1 = 10;
  RADIO_RDSTEXT2 = 11;
  RADIO_PTY1 = 12;
  RADIO_PTY2 = 13;
  RADIO_MONO1 = 14;
  RADIO_MONO2 = 15;
  RADIO_TP1 = 16;
  RADIO_TP2 = 17;
  RADIO_INTERVALL = 200;
  RADIO_REMOTE = 201;
  RADIO_ERROR = 255;
  RADIO_MESSAGE = 100;

  
var
  InitRadio: TFNInitRadio= nil;
  CloseRadio: TFNCloseRadio = nil;
  SetRadioFrequenz: TFNSetRadioFrequenz = nil;
  SetRadioIntervall: TFNSetRadioIntervall = nil;
  ScanRadio: TFNScanRadio = nil;
  SeekRadio: TFNSeekRadio = nil;
  SetRadioVolume: TFNSetRadioVolume = nil;
  SetRadioBass: TFNSetRadioBass = nil;
  SetRadioTreble: TFNSetRadioTreble = nil;
  SetRadioLoudnessOn: TFNSetRadioLoudnessOn = nil;
  SetRadioLoudnessStep: TFNSetRadioLoudnessStep = nil;
  SetRadioVolumeStep: TFNSetRadioVolumeStep = nil;
  SetRadioFaderStep: TFNSetRadioFaderStep = nil;
  SetRadioBalanceStep: TFNSetRadioBalanceStep = nil;
  SetRadioBassStep: TFNSetRadioBassStep = nil;
  SetRadioTrebleStep: TFNSetRadioTrebleStep = nil;
  SetRadioMute: TFNSetRadioMute = nil;
  SetRadioRemote: TFNSetRadioRemote = nil;
  SetRadioLoudness: TFNSetRadioLoudness = nil;
  SetRadioBalance: TFNSetRadioBalance = nil;
  SetRadioFader: TFNSetRadioFader = nil;
  SetRadioAntenne: TFNSetRadioAntenne = nil;
  SetRadioAFOn: TFNSetRadioAFOn = nil;
  SaveRadioValue: TFNSaveRadioValue = nil;
  RadioCallBack: TFNRadioCallBack = nil;
  RadioLib: HMODULE;


implementation

uses
  Radio, RadioUnit;

function LoadRadioDll: Boolean;
var
  ini: TMemIniFile;
  RadioDll: String;
begin
  result := False;
  try
    Ini:=TMemIniFile.Create('Radio.ini');
    RadioDll := Ini.ReadString('Global','RadioDll','');
  finally
    ini.Free;
  end;
  if RadioDll <> 'then
  RadioLib := LoadLibrary(PChar(RadioDll));
  if RadioLib <> 0 then
  begin
    @InitRadio := GetProcAddress(RadioLib, 'InitRadio');
    @CloseRadio := GetProcAddress(RadioLib, 'CloseRadio');
    @SetRadioFrequenz := GetProcAddress(RadioLib, 'SetRadioFrequenz');
    @SetRadioIntervall := GetProcAddress(RadioLib, 'SetRadioIntervall');
    @ScanRadio := GetProcAddress(RadioLib, 'ScanRadio');
    @SeekRadio := GetProcAddress(RadioLib, 'SeekRadio');
    @SetRadioVolume := GetProcAddress(RadioLib, 'SetRadioVolume');
    @SetRadioBass := GetProcAddress(RadioLib, 'SetRadioBass');
    @SetRadioTreble := GetProcAddress(RadioLib, 'SetRadioTreble');
    @SetRadioLoudnessOn := GetProcAddress(RadioLib, 'SetRadioLoudnessOn');
    @SetRadioLoudnessStep := GetProcAddress(RadioLib, 'SetRadioLoudnessStep');
    @SetRadioVolumeStep := GetProcAddress(RadioLib, 'SetRadioVolumeStep');
    @SetRadioFaderStep := GetProcAddress(RadioLib, 'SetRadioFaderStep');
    @SetRadioBalanceStep := GetProcAddress(RadioLib, 'SetRadioBalanceStep');
    @SetRadioBassStep := GetProcAddress(RadioLib, 'SetRadioBassStep');
    @SetRadioTrebleStep := GetProcAddress(RadioLib, 'SetRadioTrebleStep');
    @SetRadioMute := GetProcAddress(RadioLib, 'SetRadioMute');
    @SetRadioRemote := GetProcAddress(RadioLib, 'SetRadioRemote');
    @SetRadioLoudness := GetProcAddress(RadioLib, 'SetRadioLoudness');
    @SetRadioBalance := GetProcAddress(RadioLib, 'SetRadioBalance');
    @SetRadioFader := GetProcAddress(RadioLib, 'SetRadioFader');
    @SetRadioAntenne := GetProcAddress(RadioLib, 'SetRadioAntenne');
    @SetRadioAFOn := GetProcAddress(RadioLib, 'SetRadioAFOn');
    @SaveRadioValue := GetProcAddress(RadioLib, 'SaveRadioValue');
    @RadioCallBack := GetProcAddress(RadioLib, 'RadioCallBack');
    result := True;
  end;
end;


function CloseRadioDll: Boolean;
begin
  if RadioLib <> 0 then
  begin
    FreeLibrary(RadioLib);
    result := True;
  end else
    result := False;
end;


//Diese Funktion soll das Hauptprogramm aufrufen bei einer Dll-Nachricht
procedure RCallBack(Index: Integer; Data: PChar; IntData: Integer);
begin
  case Index of
  RADIO_CLOSE : begin RadioOn := False; end;
  RADIO_OPEN : begin
                      SetRadioFrequenz(LastRadioFrq, False);
                      SetRadioMute(False);
                      if RadioAF then SetRadioAFOn(True);
                      RadioOn := True;
                    end;
  RADIO_FRQ1 : begin
                      frmMain.Flash.SetVariable('RADIOFREQ', String(Data));
                      RadioFrequenz1 := String(Data);
                      Frequenz := IntData;
                    end;
  RADIO_FRQ2 : begin frmMain.Flash.SetVariable('AFFREQ', String(Data)); end;
  RADIO_PI1 : begin
                      frmMain.Flash.SetVariable('PICODE', String(Data));
                      PICode := String(Data);
                      frmMain.Flash.SetVariable('RADIOLOGO', AppPath + '\Radio\' + PICode + '.jpg');
                    end;
  RADIO_PI2 : begin frmMain.Flash.SetVariable('AFPICODE', String(Data)); end;
  RADIO_FS1 : begin frmMain.Flash.SetVariable('RDSSIGNAL', String(Data)); end;
  RADIO_FS2 : begin frmMain.Flash.SetVariable('AFFS', String(Data)); end;
  RADIO_RDSNAME1 : begin
                      frmMain.Flash.SetVariable('RDSNAME', String(Data));
                      Radioname := String(Data);
                    end;
  RADIO_RDSNAME2 : begin end;
  RADIO_RDSTEXT1 : begin
                      frmMain.Flash.SetVariable('RDSTEXT', String(Data));
                    end;
  RADIO_RDSTEXT2 : begin end;
  RADIO_PTY1 : begin frmMain.Flash.SetVariable('RADIOGENRE', String(Data)); end;
  RADIO_PTY2 : begin end;
  RADIO_MONO1 : begin frmMain.Flash.SetVariable('RADIOSTEREO', String(Data)); end;
  RADIO_MONO2 : begin end;
  RADIO_TP1 : begin frmMain.Flash.SetVariable('TP', String(Data)); end;
  RADIO_TP2 : begin end;
  RADIO_INTERVALL : begin OutputDebugString(Data); end;
  RADIO_REMOTE : begin frmMain.Remote(IntData); end;
  RADIO_ERROR : begin OutputDebugString(Data); end;
  RADIO_MESSAGE : begin OutputDebugString(Data); end;
  end;
end;


end.
Angehängte Dateien
Dateityp: zip hqctdll_176.zip (11,2 KB, 3x aufgerufen)
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