Generating pulse output using 6212

[satvir]

I am working on usb 6212 to generate pulses from this boad to drive stepper motor.i have to drive multiple stepper motors(using L298) through this board so i need many pins to genrate stepper motor driving sequence pulses.i have tried generating pulses using delay and switching the port pins alternately.but i am not able to generate high frequency pulses by doing so.will be gratefull to get ur help in solving my problem

satvir

[zgut]

Look to my simple procedure (delphi)

procedure TForm1.Button2Click(Sender: TObject);
var
 NumPoints:integer;
 der:integer;
 maxfreq:double;
 rate:real;
begin
rate:=1000;
Error:=DAQmxCreateTask('',@cnt0Handle);
MemoStatus.Lines.Add('Create cnt0 Task: status error'+IntToStr(Error));
Error:=DAQmxCreateCOPulseChanFreq(cnt0Handle,'Dev4/ctr0','',DAQmx_Val_FrequencyUnits_Hz,DAQmx_Val_Low,0.0,rate,0.50);
MemoStatus.Lines.Add('Create COPulse: status error '+IntToStr(Error));
Error:=DAQmxCfgImplicitTiming(cnt0Handle,DAQmx_Val_AcquisitionType_ContSamps,nr_sample);
Error:=DAQmxCfgImplicitTiming(cnt0Handle,DAQmx_Val_AcquisitionType_FiniteSamps,100);
MemoStatus.Lines.Add('Cfg Implicit Timing: status error '+IntToStr(Error));

  Error:=DAQmxGetDevCOMaxTimebase('dev4',@maxfreq);
  MemoStatus.Lines.Add('Cfg Implici Timing: status error '+IntToStr(Error));

  MemoStatus.Lines.Add('Max Freq: '+FloatToStr(maxfreq));

  Error:=DAQmxCreateTask('',@DOHandle);
  MemoStatus.Lines.Add('Create DO Task: status error '+IntToStr(Error));
  Error:=DAQmxGetDevDOMaxRate('dev4',@maxfreq);
  MemoStatus.Lines.Add('Max Freq DO: '+FloatToStr(maxfreq));

  Error:=DAQmxCreateDOChan(DOHandle,'Dev4/port0','',DAQmx_Val_ChanForAllLines);
  MemoStatus.Lines.Add('Create DO Chanel: status error '+IntToStr(Error));
  Error:=DAQmxCfgSampClkTiming(DOHandle,'/Dev4/Ctr0InternalOutput',rate,DAQmx_Val_Rising,DAQmx_Val_AcquisitionType_FiniteSamps,nr_sample);
  MemoStatus.Lines.Add('Sample Clk Timing: status error '+IntToStr(Error));
  Error:=DAQmxWriteDigitalU32(DOHandle,nr_sample,True,10.0,DAQmx_Val_GroupByChannel,@data[0],@writter,nil);
  MemoStatus.Lines.Add('Write Digital: status error '+IntToStr(Error));

  Error:=DAQmxStartTask(cnt0Handle);
  MemoStatus.Lines.Add('Start Cnt0: status error '+IntToStr(Error));

end;

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[sumit.sen]

Are you using LabVIEW?