dabes

Hi All, I'd like to output a simple sine wave that is triggered by a rising edge on one of the inputs. I'm currently using the following python code to achieve this: I use the AnalogInTrigger detection setup shown below #set up trigger cSamples = 1024 hzRate = 100e6 dwf.FDwfAnalogInTriggerAutoTimeoutSet(hdwf, c_double(0)) #disable auto trigger dwf.FDwfAnalogInTriggerSourceSet(hdwf, trigsrcDetectorAnalogIn) #one of the analog in channels dwf.FDwfAnalogInTriggerTypeSet(hdwf, trigtypeEdge) dwf.FDwfAnalogInTriggerChannelSet(hdwf, c_int(0)) # first channel dwf.FDwfAnalogInTriggerLevelSet(hdwf, c_double(3.0)) # 0.0V dwf.FDwfAnalogInTriggerConditionSet(hdwf, DwfTriggerSlopeRise) # relative to middle of the buffer, with time base/2 T0 will be the first sample dwf.FDwfAnalogInTriggerPositionSet(hdwf, c_double(0.5*cSamples/hzRate)) dwf.FDwfAnalogInConfigure(hdwf, c_int(1), c_int(0)) # wait at least 2 seconds with Analog Discovery for the offset to stabilize, before the first reading after device open or offset/range change time.sleep(2) dwf.FDwfAnalogInConfigure(hdwf, c_int(0), c_int(1)) Followed by a loop structure to check the trigger on every iteration of the loop while True: dwf.FDwfAnalogInStatus(hdwf, c_int(1), byref(sts)) if sts.value == 2 : # done break # Generating sine wave dwf.FDwfAnalogOutConfigure(hdwf, channel, c_int(1)) time.sleep(0.5) dwf.FDwfAnalogOutConfigure(hdwf, channel, c_int(0)) Unfortunately this yields a large delay (~2.5ms) between the rising edge of the input, and the start of the sine waveform. Furthermore, this delay has some jitter to it (i.e. it is not a consistent delay). Is there a better way to do this that doesn't require polling from FDwfAnalogInStatus? It would be helpful to be able to do this with a minimal delay bias and variance.