Hallo, I have a Virtex-4FX, and I have a design made with edk 7.1i. I have opened it into edk 8.1i and the applet asks me to upgrade it.
During upgrade process the applet asks if I want upgrade powerpc wrapper from 1.00.a to 1.01.a
If I do it the system downloaded into fpga doesn't work. Instead I don't upgrade, the system works well.
Has anyone had the same trouble? In which way can be solved?
Many Thanks in Advance Marco Toschi
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Marco,
The revised core ppc405_virtex4_v1_01_a is expected to be a drop-in = replacement for v1_00_a under all conditions, and this is the first = report I've seen indicating any problems resulting from upgrading to it. = The fix in v1.01.a redefines the default value of parameter = C_APU_CONTROL to avoid a potential intermittent PPC start-up failure = that had been observed in some (not all) V4FX designs when the APU = interface is not used. Assuming your design does not use the APU = interface, an alternative to upgrading the PPC is to just set parameter = C_APU_CONTROL =3D 0b1101111000000000 on the ppc405_virtex4_v1_00_a = instance in your design to guard against the potential start-up failure, = as described in Xilinx Answer Record: 22179. In designs that use APU, = the fix is irrelevant, so upgrading the PPC could just be bypassed.
Please let me know if you continue have difficulty with this issue after = trying the above workaround.
Regards, Jeff Seltzer, Xilinx Embedded Processor snipped-for-privacy@xilinx.com
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