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somlo>
lkcl: good news, congrats! So, that's with standard litex-bios leveling code and everything, right ?
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lkcl>
yes - but only in simulation
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lkcl>
which is both hilarious and odd
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lkcl_>
that's... interesting. the memtest "data" answers (MEMTEST_DATA_DEBUG) are always offset/rotated by 16 bits
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lkcl_>
[data 0xf238]: 0x6a29d42e vs 0xd42e3517
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lkcl_>
[data 0xf239]: 0x3517ea37 vs 0xea371a88
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lkcl_>
[data 0xf23a]: 0x1a88751b vs 0x751b8d44
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lkcl_>
the hypothesis here is that some internal litex arbiter-counters (the ones that monitor N-to-M transfers) get out-of-sync
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daveshah>
I have seen similar issues where the problem is the bitslip/latency config of the DDR3 interface
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lkcl_>
ah? you mean that line "read_latency = 2 + cl_sys_latency + 2 + log2_int(4//nphases) + 5,"
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lkcl_>
in ecp5ddrphy.py?
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