Page 1 of 1
Creating high-speed FPGA design using Qorc-SDK
Posted: Tue Sep 05, 2023 1:45 pm
by Vesuvius
Hi,
We are trying to create LPC controller design to work as LPC slave (on EOS-S3 FPGA) and we are having serious problems with meeting timing requirements. One of the problems is that we cannot use any CLOCK pads as these don't work - there is no input, just as if pad was not connected. Input works only BIDIR pads which don't have CLOCK functionality. For development I'm using latest Qorc SDK release, however I tried also using F4PGA, with the same effect.
Artur
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Fri Jan 19, 2024 3:19 pm
by Robert
What frequency external clock are you trying to use?
I would suggest bring the clock in on a FBIO pin and then instantiating a global clock buffer. I will look at creating an example if this is still an issue.
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Tue Mar 05, 2024 9:14 am
by Annata23
Robert wrote: ↑Fri Jan 19, 2024 3:19 pm
What frequency external clock are you trying to use?
I would suggest bring the clock in on a FBIO pin and then instantiating a global clock buffer. I will look at creating an example if this is still an issue.
Can you create an example for it? I still don't quite
word hurdle understand this issue
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Wed Sep 11, 2024 6:52 am
by meltobserve
Vesuvius wrote: ↑Tue Sep 05, 2023 1:45 pm
Hi,
We are trying to create LPC controller design to work as LPC slave (on EOS-S3 FPGA) and we are having serious problems with meeting timing requirements. One of the problems is that we cannot use any CLOCK pads as these don't work - there is no input, just as if pad was not connected. Input works only BIDIR pads which don't have CLOCK functionality. For development I'm using latest Qorc SDK release, however I tried also using F4PGA, with the same effect.
Artur
Based on your description, it seems like only BIDIR pads are functioning for input, while CLOCK pads remain unresponsive, which could be causing your timing problems. You’ve tried both the latest Qorc SDK and F4PGA but are encountering the same issue.
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Mon Sep 23, 2024 6:38 am
by benchcivil
Robert wrote: ↑Fri Jan 19, 2024 3:19 pm
What frequency external clock are you trying to use?
I would suggest bring the clock in on a FBIO pin and then instantiating a global clock buffer. I will look at creating an example if this is still an issue.
Please give me an
coreball example, thanks!
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Wed Oct 02, 2024 8:09 am
by firsthandrain
Robert wrote: ↑Fri Jan 19, 2024 3:19 pm
What frequency external clock are you trying to use?
I would suggest bring the clock in on a FBIO pin and then instantiating a global clock buffer. I will look at creating an example if this is still an issue.
connections game
I'm not understanding how using an external clock frequency affects and relates to this?
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Thu Oct 03, 2024 9:43 am
by visoroptimistic
Do you have any more answers to this question? Please share more.
geometry dash lite
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Wed Nov 20, 2024 9:26 am
by FreddyBlackwell
Vesuvius wrote: ↑Tue Sep 05, 2023 1:45 pm
Hi,
We are trying to create LPC controller design to work as LPC slave (on EOS-S3 FPGA) and we are having serious problems with meeting timing requirements. One of the problems is that we cannot use any CLOCK pads as these don't work - there is no input, just as if pad was not connected.
ragdoll hit Input works only BIDIR pads which don't have CLOCK functionality. For development I'm using latest Qorc SDK release, however I tried also using F4PGA, with the same effect.
Artur
The problem you're describing with the CLOCK pads not functioning suggests that there might be either an issue with the FPGA configuration or an incompatibility with the specific pads being used.
Re: Creating high-speed FPGA design using Qorc-SDK
Posted: Thu Jan 16, 2025 2:59 am
by ColeHarry
It sounds like a challenging issue you're facing with the LPC controller design. If the CLOCK pads aren't functioning as expected and only BIDIR pads are working, it could be worth double-checking the pin configurations and constraints in your design files. Sometimes, incorrect pin assignments or missing configurations in the Qorc SDK or F4PGA can lead to such behavior.