4 Replies Latest reply on Apr 3, 2016 8:31 PM by aussiesusan

    DFB examples using the DALIGN options

    aussiesusan

      I have a 12-bit ADC that I want to filter using a DFB and then (for test purposes) output to an 8-bit VDAC. (I want the 12-bit ADC to get a reasonable resolution on my signal and I don't really want to drop down to 8-bits. The VDAC output is only for initial testing purposes as I really want the output of the DFB so I can output it on an OLED display so the more bits the better

         

      All of the examples I can find use an 8-bit ADC when using DBA to the DFB. (I've looked in the examples projects, on the Cypress web side and used Google.)

         

      I must admit that I do find the DFB datasheet a little confusing at the moment - perhaps when I understand what it is actually saying then it might make sense.

         

      I can use the CPU to read the ADC and write to the DFB and similarly read the DFB holding register and write a shifted value to the VDAC but I really want to know how to set up the DFB to accept a 12-bit value via DMA into the staging registers.

         

      PSOC 5LP on an -059 kit.

         

      Thanks

         

      Susan