mirror of https://github.com/ArduPilot/ardupilot
53 lines
1.2 KiB
Python
53 lines
1.2 KiB
Python
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#!/usr/bin/env python
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'''
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decode a Saleae logic CSV export file as PWM values. Used for
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testing output values on PWM channels
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'''
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import csv, sys
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filename = sys.argv[1]
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c = open(filename, 'r')
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data = csv.reader(c)
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pulse_start = []
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prev_values = []
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pwm = []
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nchannels = 0
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for row in data:
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# skip header
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if row[0].startswith('Time'):
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continue
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changed = False
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if len(row) > nchannels+1:
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nchannels = len(row)-1
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while len(pwm) < nchannels:
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pwm.append(0)
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pulse_start.append(0)
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prev_values.append(0)
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# time in microseconds
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t = int(float(row[0])*1e6)
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# current value of each channel
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values = [int(row[i]) for i in range(1,len(row))]
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for c in range(nchannels):
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if values[c] == 0 and prev_values[c] == 1 and pulse_start[c] != 0:
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pulse = t - pulse_start[c]
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if pulse < 10000:
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pwm[c] = pulse
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changed = True
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if values[c] == 1 and prev_values[c] == 0:
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pulse_start[c] = t
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prev_values[c] = values[c]
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if changed:
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for c in range(nchannels):
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sys.stdout.write("%4u " % pwm[c])
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sys.stdout.write("%.3f\n" % float(row[0]))
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