Gary, Can you confirm the same mlib_devel checkout was used for both compiles?
--Laura On Thu, Sep 19, 2013 at 11:12 AM, Gary, Dale E. <dale.e.g...@njit.edu>wrote: > Hi All, > > I am not sure how many out there are using or planning to use the KatADC > boards in their projects, but I thought I would report on our experience, > which contains a warning: Do not use Xilinx version 11.x for ROACH2 > development that includes KatADC. We started with that version, and did > not want to slow development by upgrading. However, snap blocks that > capture the ADC time-domain output showed numerous "glitches" like that > shown in the attached file. The top plot shows the histogram of the two > ADC channels on a single KatADC board, while the middle plot shows the > time-domain data. The green channel was behaving well, but the blue > channel shows many glitches, both positive and negative. The behavior > changes whenever the ROACHes are reloaded, so that which channels are > affected can change, and can be better or worse at different times. > > We created a test design to demonstrate the problem, compiled on 11.x, and > then asked Dave MacMahon to compile the same model again on Xilinx system > generator 13.3. We found that when the new bof file is loaded there is no > sign of the glitches. We are now upgrading to 14.5, and will report our > experience with that later. > > There may be other reasons not to use 11.x on ROACH2, but we did not see > any other problems, including earlier tests with iADC boards. It was only > when we began using the KatADCs that we saw these anomalies. > > Regards, > Dale >
