[fnordlicht-mini] / firmware / doc / pwm_table.py

#!/usr/bin/python
#
#  compute pwm reference table

clock = 16000000
basefreq = 125
levels = 256
interval_cycles = 64000

if __name__ == "__main__":
    last = 0
    sum = 0
    for i in range(1,levels):
        cycles = (i/float(levels-1))**2*float(clock)/float(basefreq)
        delta = round(cycles-last)
        print "%6d: %10d %6d %6d" % (i, round(cycles), delta, round(cycles) % interval_cycles)
        last = cycles
        sum+=delta

print "sum: %d" % sum
Commit	Line	Data
ec1bef8e	1	#!/usr/bin/python
	2	#
	3	# compute pwm reference table
	4
	5	clock = 16000000
	6	basefreq = 125
	7	levels = 256
	8	interval_cycles = 64000
	9
	10	if __name__ == "__main__":
	11	last = 0
	12	sum = 0
	13	for i in range(1,levels):
	14	cycles = (i/float(levels-1))*2float(clock)/float(basefreq)
	15	delta = round(cycles-last)
	16	print "%6d: %10d %6d %6d" % (i, round(cycles), delta, round(cycles) % interval_cycles)
	17	last = cycles
	18	sum+=delta
	19
	20	print "sum: %d" % sum