#!/usr/bin/env python """ Generate the stepper delay lookup table for Marlin firmware. """ import argparse __author__ = "Ben Gamari <bgamari@gmail.com>" __copyright__ = "Copyright 2012, Ben Gamari" __license__ = "GPL" parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('-f', '--cpu-freq', type=int, default=16, help='CPU clockrate in MHz (default=16)') parser.add_argument('-d', '--divider', type=int, default=8, help='Timer/counter pre-scale divider (default=8)') args = parser.parse_args() cpu_freq = args.cpu_freq * 1000000 timer_freq = cpu_freq / args.divider print "#ifndef SPEED_LOOKUPTABLE_H" print "#define SPEED_LOOKUPTABLE_H" print print '#include "Marlin.h"' print print "const uint16_t speed_lookuptable_fast[256][2] PROGMEM = {" a = [ timer_freq / ((i*256)+(args.cpu_freq*2)) for i in range(256) ] b = [ a[i] - a[i+1] for i in range(255) ] b.append(b[-1]) for i in range(32): print " ", for j in range(8): print "{%d, %d}," % (a[8*i+j], b[8*i+j]), print print "};" print print "const uint16_t speed_lookuptable_slow[256][2] PROGMEM = {" a = [ timer_freq / ((i*8)+(args.cpu_freq*2)) for i in range(256) ] b = [ a[i] - a[i+1] for i in range(255) ] b.append(b[-1]) for i in range(32): print " ", for j in range(8): print "{%d, %d}," % (a[8*i+j], b[8*i+j]), print print "};" print print "#endif"