Yes, Dave, I think you're right. I'm unclear why the sys_clk MMCM doesn't just have hard-coded clock factors. Its input clock never changes and it's always outputting 100 MHz and 200 MHz.
On the other hand, the aux_clk MMCM does seem to have its factors hard-coded even though aux_clk can be an arbitrary frequency. Am I missing something? Side note: why are these clock factors derived in detokenize.m? Surely there's a more appropriate place to do this? Best, Rurik On Fri, May 9, 2014 at 4:53 PM, David MacMahon <[email protected]> wrote: > I think Gopal's problem with the ska-sa mlib_devel is due to commit e419ce2. > This commit changed the calculation of the "clock factors" in > xps_library/detokenize.m to be based on app_clk_rate (250 MHz in Gopal's > case) rather than 100 MHz. These clock factors are passed to the > roach_infrastructure HDL via parameters that get defined in system.mhs. > > Dave >
