Forum Discussion

ESama's avatar
ESama
Icon for New Contributor rankNew Contributor
5 years ago
Solved

FIR II Placement

Hello I would like to use a FIR II decimation filter in a Cyclone 10GX target. During the fitter placement process, I get the following message: "Cannot place the following 19 DSP cells -- a legal ...
  • ESama's avatar
    ESama
    4 years ago

    Hi

    Thank you for your reply.

    I therefore built a simple project to mimic the FIR decimation filter alone and every thing is OK. So, the PB seems to come from some other parts of my project.

    Best regards

CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi,


As I understand it, you observe some Fitter problem with your design with only 1 FIR IP instance. As I checked the part that you have selected, there are quite a number of DSP blocks. I have created a simple test design in Q20.2Pro with 1 FIR instance mimic your configuration and seems to be able to fit. My simple design uses 19 DSP blocks.


To facilitate further debugging, would you mind to share with me a simple test design of yours so that I could perform replication on my side.


Please let me know if there is any concern. Thank you.



Best regards,

Chee Pin