comparison: create_speed_lookuptable.py
create_speed_lookuptable.py
- changeset 0
- 2c8ba1964db7
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| -1:000000000000 | 0:2c8ba1964db7 |
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| 1 #!/usr/bin/env python | |
| 2 | |
| 3 """ Generate the stepper delay lookup table for Marlin firmware. """ | |
| 4 | |
| 5 import argparse | |
| 6 | |
| 7 __author__ = "Ben Gamari <bgamari@gmail.com>" | |
| 8 __copyright__ = "Copyright 2012, Ben Gamari" | |
| 9 __license__ = "GPL" | |
| 10 | |
| 11 parser = argparse.ArgumentParser(description=__doc__) | |
| 12 parser.add_argument('-f', '--cpu-freq', type=int, default=16, help='CPU clockrate in MHz (default=16)') | |
| 13 parser.add_argument('-d', '--divider', type=int, default=8, help='Timer/counter pre-scale divider (default=8)') | |
| 14 args = parser.parse_args() | |
| 15 | |
| 16 cpu_freq = args.cpu_freq * 1000000 | |
| 17 timer_freq = cpu_freq / args.divider | |
| 18 | |
| 19 print "#ifndef SPEED_LOOKUPTABLE_H" | |
| 20 print "#define SPEED_LOOKUPTABLE_H" | |
| 21 print | |
| 22 print '#include "Marlin.h"' | |
| 23 print | |
| 24 | |
| 25 print "const uint16_t speed_lookuptable_fast[256][2] PROGMEM = {" | |
| 26 a = [ timer_freq / ((i*256)+(args.cpu_freq*2)) for i in range(256) ] | |
| 27 b = [ a[i] - a[i+1] for i in range(255) ] | |
| 28 b.append(b[-1]) | |
| 29 for i in range(32): | |
| 30 print " ", | |
| 31 for j in range(8): | |
| 32 print "{%d, %d}," % (a[8*i+j], b[8*i+j]), | |
| 33 print | |
| 34 print "};" | |
| 35 print | |
| 36 | |
| 37 print "const uint16_t speed_lookuptable_slow[256][2] PROGMEM = {" | |
| 38 a = [ timer_freq / ((i*8)+(args.cpu_freq*2)) for i in range(256) ] | |
| 39 b = [ a[i] - a[i+1] for i in range(255) ] | |
| 40 b.append(b[-1]) | |
| 41 for i in range(32): | |
| 42 print " ", | |
| 43 for j in range(8): | |
| 44 print "{%d, %d}," % (a[8*i+j], b[8*i+j]), | |
| 45 print | |
| 46 print "};" | |
| 47 print | |
| 48 | |
| 49 print "#endif" | |
| 50 |
