Re: [casper] PRESTO and ROACH+QuadADC

2017-04-04 Thread indrajit
Dear Rolando, 1) rolando@rolando-MS-7815:/media/rolando/pocobe4/gulp$ sudo ./gulp -i eth1 > pulsar0.dat Will write the filtered data in pcap format. 2) Are you peeling out the filter channel data from the pcap format and arranging it ? 3)PRESTO needs floating data, I have to convert my

Re: [casper] Minimum Clock Frequency (ROACH2)

2017-04-04 Thread Franco
Ok, thanks for the suggestion, I'll try it out. Franco On 04/04/17 09:50, James Smith wrote: Hello Franco, If you're only using 1 sample at a time, you needn't use a CASPER FFT, the Xilinx ones do the trick nicely. You can use an asynchronous 1-input PFB if you want to as well. You would

Re: [casper] Minimum Clock Frequency (ROACH2)

2017-04-04 Thread James Smith
Hello Franco, If you're only using 1 sample at a time, you needn't use a CASPER FFT, the Xilinx ones do the trick nicely. You can use an asynchronous 1-input PFB if you want to as well. You would probably need to rework your down-stream stuff though. Regards, James On Tue, Apr 4, 2017 at 2:48

Re: [casper] Minimum Clock Frequency (ROACH2)

2017-04-04 Thread Franco
Oh, that may be exactly what I need, I'll try it out. Thanks! Franco On 04/04/17 03:14, Andrew Martens wrote: Hey Franco Many of the CASPER blocks were updated a while ago so that you can use them asynchronously i.e data does not need to be fed to the blocks on every clock cycle. You can

Re: [casper] Minimum Clock Frequency (ROACH2)

2017-04-04 Thread Franco
Hi Jack, I though of that, but the thing is, if I only take 1 sample per clock cycle, I'm not sure how to use a 8 input FFT and still keep the same number of output channels. Maybe I could implement serial-to-parallel block, and read the FFT every 8 cycles, but I don't know if that's an

Re: [casper] ROACH1 serial to USB connection

2017-04-04 Thread Marc Welz
This is a bit hazy, but I think that might be because the processor hasn't stopped properly - some permutation of rebooting, unplugging and pressing the halt button on the GUI repeatedly sometimes helps. Also check if the processor isn't running in an overclocked configuration regards marc On

Re: [casper] Minimum Clock Frequency (ROACH2)

2017-04-04 Thread Andrew Martens
Hey Franco Many of the CASPER blocks were updated a while ago so that you can use them asynchronously i.e data does not need to be fed to the blocks on every clock cycle. You can then run your FPGA at a higher clock rate than the input data rate. Regards Andrew On Tue, Apr 4, 2017 at 4:22 AM,