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
