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improve loop timing accuracy measure #1

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improve loop timing accuracy measure #1

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baa85c0
improve timming accuracy measure
Lx37 Jul 25, 2022
9dc5567
move the print to improve timing accuracy
Lx37 Jul 28, 2022
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29 changes: 16 additions & 13 deletions controller/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -257,9 +257,13 @@ def run(self):
# Check accuracy
lastEffectiveDuration = (datetime.datetime.now() - startTime).total_seconds() * 1000
lastWantedDuration = (endTime-startTime).total_seconds() * 1000
print('Cycle Accuracy: ')
print('\tLast cycle duration (real/target): ', round(lastEffectiveDuration, 2), '/', round(lastWantedDuration,2), 'ms')
print('\tError:', round(lastEffectiveDuration-lastWantedDuration, 2), 'ms' )

# Start next sample timing
startTime = datetime.datetime.now()
audioTime = startTime + datetime.timedelta(milliseconds= audio_duration*1000) # end of audio: time to turn off GPIO
stopTime = audioTime + datetime.timedelta(milliseconds= isi_duration*1000-10) # end of audio+ISI-10ms: stop audio stream
endTime = audioTime + datetime.timedelta(milliseconds= isi_duration*1000) # end of audio+ISI: start next sample


# Pause
if self.paused():
Expand All @@ -270,15 +274,7 @@ def run(self):
# check Stop
if not self.playing():
break

# ----

# Start next sample timing
startTime = datetime.datetime.now()
audioTime = startTime + datetime.timedelta(milliseconds= audio_duration*1000) # end of audio: time to turn off GPIO
stopTime = audioTime + datetime.timedelta(milliseconds= isi_duration*1000-10) # end of audio+ISI-10ms: stop audio stream
endTime = audioTime + datetime.timedelta(milliseconds= isi_duration*1000) # end of audio+ISI: start next sample


self.core.emit('playing-at', row['Stimulus'], index)

# Play Sample
Expand All @@ -295,10 +291,12 @@ def run(self):

# Wait for audio duration : stream.write() might return before audio buffer is completely flushed
self.wait(audioTime, 'audio')



# UnTrigger GPIO
if is_RPI():
GPIO.output(GPIO_trigOn, 0)
GPIO.output(GPIO_trigOn, 0)

except sd.PortAudioError:
if self._playing:
Expand All @@ -310,6 +308,11 @@ def run(self):
self._playing = False
break

# Print cycle accuracy
print('Cycle Accuracy: ')
print('\tLast cycle duration (real/target): ', round(lastEffectiveDuration, 2), '/', round(lastWantedDuration,2), 'ms')
print('\tError:', round(lastEffectiveDuration-lastWantedDuration, 2), 'ms' )


# Still playing: let last sample/isi terminate
if self.playing():
Expand Down