[sdiy] SPI Digital Potentiomters and PIC 18.. not working.. help!

Bill Berzinskas wberzinskas at nc.rr.com
Mon Mar 14 17:42:14 CET 2005


this is how my mssp registers are set.. 
the other hardware does work..  i've got an lcd hooked up
to it as well..   

    movlw  b'01000000'  
    movwf  SSPSTAT 
    movlw  b'00100001' 
    movwf  SSPCON1 
  ----- Original Message ----- 
  From: Jay Schwichtenberg 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Monday, March 14, 2005 10:40 AM
  Subject: RE: [sdiy] SPI Digital Potentiomters and PIC 18.. not working.. help!


  Not a lot of info here Bill.

  Do you have any indication that any of the program that you put in the unit is working (ie does the hardware work)?

  Did you program the MSSP and clocks correctly for SPI?

  You have to get the MSSP port programmed correctly before anything will happen.

  Good luck!
  Jay S.
    -----Original Message-----
    From: owner-synth-diy at dropmix.xs4all.nl [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Bill Berzinskas
    Sent: Monday, March 14, 2005 6:50 AM
    To: synth-diy at dropmix.xs4all.nl
    Subject: [sdiy] SPI Digital Potentiomters and PIC 18.. not working.. help! 


    I'm using a microhip spi digital potentiometer..  i'm sending data as follows

    CS high > low
    write command byte (00010001)
    write data byte
    cd low > high

    and nothing is working..   what am i missing?    i'm sending the data from a pic18f

    please help
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20050314/e5c288d7/attachment.htm>


More information about the Synth-diy mailing list