picoscope 6403 series -

I use ps6403 in which the following problem is seen only using my code:

first time picoscope driver calls the callback function only when there is trigger. but if do stop and then start the capture again, picoscope seems to call the callback very frequently even when there are no triggers happened

pls help where am i missing

<picoscope opened successfully> posting code after picoscope open:

Code: Select all

ps6000SetEtsEx(handlePico, PS6000_ETS_OFF, 0, 0, NULL); // Turn off ETS

analogueOffset  = 2.0;

ps6000SetChannelEx(handlePico,PS6000_CHANNEL_A,iChanelAEnabled,iCouplingChannelA ,(enPS6000Range)m_iVoltageRangeA, analogueOffset, PS6000_BW_FULL);

m_iTimeBase = 127; //0x7F

ps6000GetTimebaseEx(handlePico,m_iTimeBase,(unsigned long) m_iCurrentBufferSize,&timeIntervalNanoseconds ,0,(unsigned long*)&maxSamples,(unsigned long)0);

//timeIntervalNanoseconds  returned from above call is 787L (0x00000313)

struct tTriggerChannelProperties sourceDetails = {iThreshold,iHysteresis
                                                    iThreshold,
                                                    iHysteresis,
                                                    (enPS6000Channel) iChannel,
                                                    PS6000_LEVEL };

ps6000SetTriggerChannelProperties(handlePico,&sourceDetails,1,0,m_iCaptureTimeMilliseconds);

ps6000SetTriggerChannelDirectionsEx(handlePico,trig6000Cha,NONE,NONE,NONE,NONE,NONE);
TRIGGER_CONDITIONS conditions = {CONDITION_TRUE ,
                                                             CONDITION_DONT_CARE,
                                                             CONDITION_DONT_CARE,
                                                             CONDITION_DONT_CARE,
                                                             CONDITION_DONT_CARE,
                                                             CONDITION_DONT_CARE,
                                                             CONDITION_DONT_CARE };

ps6000SetTriggerChannelConditions(handlePico,&conditions,1);

ps6000SetDataBufferEx(handlePico,PS6000_CHANNEL_A,w_PicoBufferA.obItems,m_iCurrentBufferSize,0);