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

[Bill Berzinskas]

Well.. I got this working..    not as i would have liked to.. but it is working.. i found the application note on their site for SPI to their digital potentiometers via a pic16f877..  which is a diff processor then i'm using, but most of the code is the same.. after making the appropriate changes to the code (registers n such), i loaded it up, and have been hacking at it all day..  then i ran across another sample code in there.. for firmware implementation..   so that what i tried.. works like a charm..    any ideas why my hardware SPI port never worked tho? 

  ----- Original Message ----- 
  From: Bill Berzinskas 
  To: Jay Schwichtenberg ; synth-diy at dropmix.xs4all.nl 
  Sent: Monday, March 14, 2005 11:42 AM
  Subject: Re: [sdiy] SPI Digital Potentiomters and PIC 18.. not working.. help!


  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
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