Forum Discussion

tsoundi's avatar
tsoundi
Icon for New Contributor rankNew Contributor
2 years ago
Solved

Unrecognized output fir II

Hi, I made a fir filter using the FIR II in the ip catalog of Quartus Prime Lite Edition. When implementing my fir filter I get an Unrecognized signal at the output of the filter. I made a testbe...
Simulation
  • Kshitij_Intel's avatar
    Kshitij_Intel
    2 years ago

    Hi,


    When you are using the FIR II IP with Lite edition there will be time limited SOF will generate.


    Are you giving any reset to the FIR IP? If Yes, try changing the reset polarity on HW(eg. active low to active high).


    Thank you

    Kshitij Goel


Kshitij_Intel's avatar
Kshitij_Intel
Icon for Frequent Contributor rankFrequent Contributor
2 years ago

Hi Daoud,


Do you mean you are using Lite edition? FIR II IP will work but it will need license to generate full bitstream, else it will be time-limited bitstream. If you are able to generate the SOF then it should work on HW.


How are you trying to see the output data? Are you trying to capture using STP?


Thank you

Kshitij Goel


  • tsoundi's avatar
    tsoundi
    Icon for New Contributor rankNew Contributor
    2 years ago

    Hi,

    Yes, I am using Quartus Prime Lite edition. I am utilizing the Nuand bladeRF with a Cyclone V FPGA. You can find instructions on how to build the project and deploy it on the board in this GitHub repository: https://github.com/Nuand/bladeRF/wiki/FPGA-Development. I am executing specific Linux commands to build the project, which generates an ".rbf" file containing the bitstream. Afterwards, I load this file onto the FPGA.

    To observe the output, I have SMA connections on the bladeRF which receives and send data with antennas, as shown in the picture below. I connect the bladeRF to my computer and utilize the GNU Radio software to view the output. I have successfully implemented numerous codes without the FIR II filter, where the output is clearly visible. However, when I incorporate the FIR filter, I am unable to observe any output.

    Thank you,

    Daoud