Multiple pins

Comments

• Mike Green Posts: 23,101

  2007-04-30 20:26 edited 2007-04-30 20:26

  You can directly access groups of 4 or 8 pins using names like OUTL/OUTH and the nibble equivalents. Look at the section of the PBasic manual that talks about memory for the BS2. It lists all of these special names (and suffixes) and gives examples of their use.
• StarMan Posts: 306

  2007-05-01 01:38 edited 2007-05-01 01:38

  Thanks Mike.· I read the similar section in the Pbasic editor help file but the manual is clearer.· I get it now.
• StarMan Posts: 306

  2007-05-02 22:02 edited 2007-05-02 22:02

  Hmmm,· Well, I thought I understood but I guess not.· My understanding is that if I use OUTD = 1, pins 12 thru 15 will output high.· But only pin 12 goes high.
  
  I tried this little piece of test code with LEDs on pins 12 thru 15.· The HIGH commands work, OUTD does not.· Only pin 12 goes high with OUTD.
  
  '

  ---

  [noparse][[/noparse] Initialization ]

  ---

  DIRS = %1111000000000000
  
  
  
  '

  ---

  [noparse][[/noparse] Program Code ]

  ---

  
  Main:
  HIGH 12
  PAUSE 1000
  LOW 12
  PAUSE 1000
  HIGH 13
  PAUSE 1000
  LOW 13
  PAUSE 1000
  HIGH 14
  PAUSE 1000
  LOW 14
  PAUSE 1000
  HIGH 15
  PAUSE 1000
  LOW 15
  PAUSE 1000
  
  OUTD = 1
  PAUSE 1000
  OUTD = 0
  PAUSE 1000
  
  GOTO Main
  
  It has to be something simple.· Any Guidance?
  
  Thanks,
  
  Chris I.
• Mike Green Posts: 23,101

  2007-05-02 22:19 edited 2007-05-02 22:19

  When you write "OUTD = 1", you're really writing "OUTD = %0001" which sets the pins the way you're seeing. If you want to set all of them high, you have to write "OUTD = %1111" or "OUTD = $F" or "OUTD = 15"
• StarMan Posts: 306

  2007-05-02 22:36 edited 2007-05-02 22:36

  Ha!· More simple than I thought.
  
  Thanks Mike.