Thanks, Jay, So is everything (other than the adc16_test_rev2x8.bof file from the wiki) working for you now? It sounds like the adc16_test_rev2x8.bof file on the wiki has issues. I'll look into it.
Thanks again, Dave On May 8, 2014, at 3:28 PM, Jay Brady wrote: > Dave - > > I've attached the output of the init, status and dump_chans scripts using > the bitstream from the wiki (Adc16_test_rev2x8). There is only 1 adc > installed using ZDOK0. Clock is +6 dBm at 200MHz. Signal input is on channel > a4. > > After deleting and re-installing your gem, I tried a bitstream of my own and > everything worked as it should. However, going back to the bitstream from the > wiki I still get the duplication problem (as if I'm only getting lane A). I > just regenerated that bitstream using the model you provided me a while ago, > and I don't see any issues. > > As for the offset binary issue I was having, I'll chalk that up to user > error. I haven't been able to reproduce it since I saw it the other day. > > Jay > > > Subject: Re: [casper] adc16x250 issue > > From: [email protected] > > Date: Tue, 6 May 2014 15:46:03 -0700 > > CC: [email protected] > > To: [email protected] > > > > Hi, Jay, > > > > The yellow block does indeed convert the ADC's straight offset binary (the > > default mode) to two's complement. If you configure the ADC to output in > > two's complement, then the yellow block will convert that two's complement > > to straight offset binary. > > > > What is the power level of the clock you're providing the ADCs? Is it as > > described in: > > > > https://casper.berkeley.edu/wiki/ADC16x250-8_coax_rev_2#ADC16x250-8_coax_rev_2_Inputs > > > > Can you please send a copy of your "adc16_init.rb" command line and its > > output? > > > > Other things that could be interesting are the output of "adc16_status.rb > > -c" and "adc16_dump_chans.rb"? > > > > Thanks, > > Dave > > > > On May 6, 2014, at 2:22 PM, Jay Brady wrote: > > > > > Hi all, > > > > > > I'm working on getting a system up and running using the adc16x250. To > > > get started I've been using the sample model,ruby gem, and user guide > > > text file from the wiki. I've got two issues, but I don't know if the > > > problems are in the yellow block, the ruby control scripts or in the > > > model. The Ruby gem was installed from > > > http://astro.berkeley.edu/~davidm/gems adc16 > > > > > > For my tests, I have a 200MHz clock and a simple sine wave being fed into > > > one of the inputs. > > > > > > Here's the two problems: > > > > > > 1. The adc16x250-8 yellow block is putting data out in the 'straight > > > offset binary' format. In the adc16.rb file, there is a comment that says > > > the yellow block should converts this to two's complement (line 290ish). > > > Is that true, or should I plan on the yellow block not converting it and > > > set the adc control reg to give me two's complement instead of the offset > > > binary? > > > > > > 2. The data coming out of the yellow block is the same for two > > > consecutive clocks and it seems to skip every other sample (i.e [0 0 2 2 > > > 4 4] instead of [ 0 1 2 3 4 5]). It seems like it's not switching between > > > lanes A/B. > > > > > > I've looked through the adc16_init.rb, adc16_plot_chans.rb and adc16.rb > > > scripts and some of the yellow block vhdl, but I'm not seeing anything > > > that jumps out at me. Perhaps someone else knows what I need to do? > > > > > > Thanks, > > > Jay Brady > > > > > > > > > <status.log><init.log><dump_chans.log>
