[casper] DRAM (DDR3) ROACH-2

Hi all I have been working on a yellow block for the DDR3 of the ROACH-2. As far as I know this yellow block does not yet exist? The same DRAM yellow block is used and interfacing the memory remains the same (as for the ROACH-1). The DRAM also uses an asynchronous fifo to allow long write bursts

Re: [casper] strange problem in the FFT

Hi, Andrew, On Jul 23, 2013, at 10:03 PM, Andrew Martens wrote: > Well, I am certainly glad that there is a rational explanation. Me, too! > So the FFT has not been broken for ~2 years or so, just since anyone upgraded > their tools. Yes, it only affects people using the 14.x System Generator

Re: [casper] strange problem in the FFT

Hi Dave The only way that the script could generate logic that would result in correct data would be correct if; 1. The Relational block could get a latency of 1 when no latency was specified i.e default operation has latency of 1 in that toolflow version. You're right! That's exactly the pro

[casper] what is the power up option?

Greetings all! The ActelFusion MMS subsystem on the ROACH-1 boards has a "power up on reset" option. During some testing a week or so ago, this option was turned off on one of our ROACHes. So I was not surprised that I could not program the FPGA with firmware. However, I was surprised to se

Re: [casper] strange problem in the FFT

Hi, Andrew, On Jul 23, 2013, at 7:54 AM, Andrew Martens wrote: > The only way that the script could generate logic that would result in > correct data would be correct if; > 1. The Relational block could get a latency of 1 when no latency was > specified i.e default operation has latency of 1 i

Re: [casper] Idea for speeding up CASPER build times

Hi Ryan So I just finished a ROACH2 build, and everything from "copy base package" through bitgen took almost 2 hours. It looks like this is because I have 48 "shared memories", plus about another 20 "snapshots". The tools seem to be synthesizing each of these separately. I would expec

[casper] Idea for speeding up CASPER build times

Hey all, So I just finished a ROACH2 build, and everything from "copy base package" through bitgen took almost 2 hours. It looks like this is because I have 48 "shared memories", plus about another 20 "snapshots". The tools seem to be synthesizing each of these separately. I would expect

Re: [casper] strange problem in the FFT

Hi Dave Thanks for sending your test model. Since it was saved using a newer Simulink version, I had to simulate it using a newer toolflow version. Sorry about that. Doing so did indeed show the FFT problem you described. I then re-simulated my test model in the newer Simulink version and

Re: [casper] Possible CASPER workshop lecture topic

On 22 Jul 2013 18:00, "John Ford" wrote: > > > Hi Rich, > > > > In hoping to get a yellow block tutorial up and running (there is a > > tutorial Dave George wrote a few years ago which I'll use as a starting > > point), probably based around a bidirectional gpio block. But if you (or > > anyone el