Servo Pulsout

Comments

• allanlane5 Posts: 3,815

  2004-11-02 15:53 edited 2004-11-02 15:53

  Umm, the Basic Stamp 2 Programming Manual, under the PULSOUT entry, says the PULSOUT 'tick' size for the BS2p is 1.18 uSec. The BS2sx uses 0.8 usec. Thus your math is good for the BS2sx, *not* the BS2p.
  
  For the BS2p, you would need 1.5 mSec/1.18 uSec == 1271 'ticks'.
  
  (To check, 1271 * 1.18 uSec == 1.49978 mSec. *Should* be close enough.)
• Newzed Posts: 2,503

  2004-11-02 16:03 edited 2004-11-02 16:03

  
  Allan, the current Help file for the Editor says .8 for the BS2P and the BS2SX.· I wonder which is right?
  
  One other question:
  
  I just want to make sure of something before I wrap up this big PC board.
  If I read, say GP0, and get %10000001, the first 1(msb) is GP0.7 and the last 1 (lsb) is GP0.0.· Correct?
  
  
  
  Sid
  
  
  
• allanlane5 Posts: 3,815

  2004-11-02 16:13 edited 2004-11-02 16:13

  Yes, the MSBit (Most Significant Bit) is considered Bit 7. The LSB is Bit 0. This is done by convention, and that *is* the convention for the BS2 (and the PIC it is based on). Good question.
  
  For the pulse width -- the fastest way to know for sure is to try it. Just checked the on-line help, and darn if you arn't correct. So now we have two standards which each say something different. Help me, Mr. Wizard (Jon)!
• Jon Williams Posts: 6,491

  2004-11-02 18:14 edited 2004-11-02 18:14

  The current help file has a conditional compilation example for PULSOUT that should help you with different BASIC Stamp modules.
  
  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  Jon Williams
  Applications Engineer, Parallax
  Dallas Office
• dandreae Posts: 1,375

  2004-11-02 18:44 edited 2004-11-02 18:44

  Hello,
  
  Actually the 0.8uS is correct for the BS2sx and BS2p.
  
  Dave