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Pulse Train in python
#1
Question 
hello, i am currently implementing a pulse train with ten bursts of three 1ms pulses, 20ms apart. each burst 200ms apart
my code is as follows:

## times to trigger (ten bursts of three 1ms pulses 20ms apart, each burst 200ms apart)
pulseTimes = [0.000, 0.020, 0.040,
             0.240, 0.260, 0.280,
             0.480, 0.500, 0.520,
             0.720, 0.740, 0.760,
             0.960, 0.980, 1.000,
             1.200, 1.220, 1.240,
             1.440, 1.460, 1.480,
             1.680, 1.700, 1.720,
             1.920, 1.940, 1.960,
             2.160, 2.180, 2.200]
## voltages for each trigger, PowerMag triggers on 5V
voltages = [5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
           5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
           5, 5, 5, 5, 5, 5, 5, 5, 5, 5]

myPulsePal.sendCustomPulseTrain(1, pulseTimes,
                               voltages)  # Send arrays to PulsePal, as custom train 1 (of 2 possible)
## setoutputchannel 1 to use 1 ms pulses
myPulsePal.programOutputChannelParam('phase1Duration', 1, 0.001)
## set output channel 1 to use custom pulse train 1

myPulsePal.programOutputChannelParam('customTrainID', 1, 1)
print(pulseTimes)

output>>[0.0, 400.0, 800.0, 4800.0, 5200.0, 5600.000000000001, 9600.0, 10000.0, 10400.0, 14400.0, 14800.0, 15200.0, 19200.0, 19600.0, 20000.0, 24000.0, 24400.0, 24800.0, 28800.0, 29200.0, 29600.0, 33600.0, 34000.0, 34400.0, 38400.0, 38800.0, 39200.0, 43200.0, 43600.0, 44000.0]



These outputs are supposed to be converting the inputs in seconds to multiples of 100us if I understand the code correctly, however, the self.cycleFrequency = 20000; 
This means that it is actually converting my input times into multiples of 200us. can you please explain if this is correct? 

*edit: I now realize that the code is indeed translating to the correct time, but not multiples of 100us. it is multiples of 50us: 

1s/20000 = 50us= .00005s; 400*50us = .02s.

also is there a better way to implement this?


pps. Are you planning to update to python 3.7 anytime soon?

Thank you so much for this wonderful device, cheers,
Bryce
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Messages In This Thread
Pulse Train in python - by Bryce_ds - 07-27-2020, 08:50 PM

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