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Clarification on SDRAM chip on ULX3S for Litex #50
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Hi Matt, From what I'm seeing in the tech sheet, it seems that IS42S16160G is very similar to the other chips supported by LiteX (except that it supports higher freq). There are good chances that it can work with one of the other chips supported by LiteX, did you try ? LiteX BIOS has a sdram_test command that can help detecting if something goes wrong. Best, |
Hi Bruno, sdram_test didn't work with AS4C32M16, it worked with MT48LC16M16 (but only tested first megabyte - not sure if that's expected). Not tried AS4C16M16 yet - got sidetracked by food....will try shortly. Thanks, |
AS4C16M16 also appears to work - and also only 1Mbyte is tested. |
LiteX BIOS has several commands to do various tests. litex> mem_list then you can do: you can also do: |
Using MT48LC16M16 I get
So its all probably working.... |
Sounds good ! |
Just tried the demos and they seem fine. |
Hi,
I was following
learn-fpga/FemtoRV/TUTORIALS/litex.md
and it says:However, mine, like the majority of ULX3S has a IS42S16160G in them (see here at the bottom of the page)
Could these instructions be updated to state what value the SDRAM variable should be set to for this case?
Thanks,
Matt
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