SPI interfacing with BS2...examples please

Comments

• Jon Williams Posts: 6,491

  2004-09-25 05:12 edited 2004-09-25 05:12

  What device, specifically? If you look at the help file under SHIFTOUT and SHIFTIN you'll find examples that will get you going. Just understand that the BASIC Stamp is the SPI master and can only send (SHIFTOUT) or receive (SHIFTIN) -- not both functions at the same time.
  
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  Jon Williams
  Applications Engineer, Parallax
  Dallas Office
• cwolff Posts: 24

  2004-09-25 05:16 edited 2004-09-25 05:16

  Jon,
  
  Thank you for your reply.· I'm trying to interface with a v2xe compass.· I threw together some code but didn't get much output..except "0"
  
  ' {$STAMP BS2p}
  COMpin········· CON············ 11··············· 'bs input pin
  COMpout········ CON············ 12
  CLK············ CON············ 15··············· 'clock pin
  CS············· CON············ 14··············· 'SS pin
  degree········· VAR············ Word············ 'data coming from compass
  Main:
  LOW CS······································ 'activate the compass
  SHIFTIN COMpin, CLK, MSBFIRST, [noparse][[/noparse]degree]··········· 'shift in the data
  HIGH CS········································· 'deactivate the compass
  DEBUG ? degree
  PAUSE 1000
  GOTO Main:
  
  Any suggestions, as always, are always appreciated.
  
  Regards,
  Christopher
• Jon Williams Posts: 6,491

  2004-09-25 16:17 edited 2004-09-25 16:17

  Take a look at this thread: http://forums.parallax.com/forums/default.aspx?f=5&m=4551
  
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  Jon Williams
  Applications Engineer, Parallax
  Dallas Office
• cwolff Posts: 24

  2004-09-25 20:28 edited 2004-09-25 20:28

  Jon,
  
  Thanks, i'll move this discussion over there.· Your help is greatly appreciated.