Microchip MCP23X GPIO expander

Comments

• Newzed Posts: 2,503

  2006-10-03 21:44 edited 2006-10-03 21:44

  The MCP23016 is an I2C chip and works best with a BS2p or a BS2pe.· It will tun on a BS2 or BS2E, but it requires a special program.· What Stamp are you using?· I have codes for the BS2pe and the BS2.
  
  Sid
  
  
  
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  Sid Weaver
  Need a TV Module?
  
  Newzed@aol.com
  ·
• Chris Savage Parallax Engineering Posts: 14,406

  2006-10-03 21:46 edited 2006-10-03 21:46

  Hello,
  ·
  ·· 16 outputs can be gotten easier using the 74HC595 Shift Register using only 3 I/O lines.· The MCP23X will require more code to do the same work.· Of course this is assuming you’re just trying to make certain pins HIGH/LOW.· I hope this helps.· Take care.
  
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  Chris Savage
  Parallax Tech Support
• tigershark35 Posts: 60

  2006-10-04 12:29 edited 2006-10-04 12:29

  Thanks Chris and Sid. I have one a sample of the MCP23X so I thought I would give it a try. I would like to see the code Sid. But Chris - i have some of the 74HC595 s on order and have seen the code from one of the experiments.
  
  Thanks
  JG
• tigershark35 Posts: 60

  2006-10-04 12:30 edited 2006-10-04 12:30

  Oh, I forgot, I am using a BS2
  
  JG
• Newzed Posts: 2,503

  2006-10-04 12:47 edited 2006-10-04 12:47

  JG, here is the code for a BS2.
  
  Sid
  
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  Sid Weaver
  Need a TV Module?
  
  Newzed@aol.com
  

  BS2

  BS2

  MCP23016_Bs2 Rev B.BS2

  7K

  MCP23016_Bs2 Rev B.BS2 6.9K
• tigershark35 Posts: 60

  2006-10-04 15:43 edited 2006-10-04 15:43

  Thanks
  JG