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<
animatrix >
i'm trying to build verilog rtl of litedram for arty
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<
animatrix >
i'm not sure what to do though, can anyone help me out ?
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<
animatrix >
please help me out
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<
_florent_ >
and do litedram_gen arty.yml
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<
_florent_ >
and re-run
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<
animatrix >
yeah i found an issue with some data of how to use
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<
animatrix >
why does litedram use ISERDES in networking mode and not memory mode
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<
animatrix >
i see people reading the input dqs strobe and using that as a clock to the DQ iserdes but that doesn't seem to be what's going on here
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<
animatrix >
also memory mode is only capable of 1:4 and not 1:8 like networking, i'm not sure what the compromises are of using either in this situation
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<
animatrix >
2. I tried simulating litedram for 100us with a ddr3 model, i see a lot of 'X' on the address lines. The controller keeps repeating a precharge all and doesn't do the init sequence and init_done never becomes true.
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<
tpb >
Title: image — ImgBB (at ibb.co)
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<
animatrix >
i'm unable to get init_done to go high :(, all the simulation shows is PRE command followed by refresh command every 7-8us
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<
animatrix >
i've simulated it for around 200us and no dice
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<
animatrix >
am i doing something wrong ? I thought once i let go of the reset the controller should start initializing the system
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<
animatrix >
mode register programming and all that
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<
animatrix >
nothing seems to be going on
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<
animatrix >
my testbench is fairly simple, 200Mhz clock. hold reset for the first 1000ns and let go.
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<
animatrix >
using vivado so all the xilinx modules can be simulated too
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<
animatrix >
is there a discord or something for litex ?
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<
zyp >
this is the something, as far as I'm aware :)
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