ON 20050504@6:41:30 PM at page:
http://www.piclist.com/techref/member/SSI-WSU-444/index.htm#38476.7788078704
  [ve7it-shaw-] Says

Looking for stepper code to provide trapezoidal motion profiles (accell,const velocity,decel type moves). This exists for servo systems, but I need to optimize the moves on a stepper system. A 16,24 or 32 bit position accumulator would be adequate.  cheers Lawrence VE7IT