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| slagernate | I can't seem to get the software/demo working on a crosslink-nx eval board. litex_term is hanging when I try to upload anything. Same behaviour when I try e.g. the wishbone tool on this [icebreaker-litex tutorial](https://github.com/icebreaker-fpga/icebreaker-litex-examples) (although at least in this case I am getting `screen /dev/ttyUSB1 115200` | 10:00 |
|---|---|---|
| slagernate | to work. Can someone share or point me to an example crosslinknx setup? Kind of disappointed how difficult this has been.. was getting similar errors as this closed issue, https://github.com/enjoy-digital/litex/issues/814, which took a while to overcome. | 10:00 |
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| minute | i have the VideoFrameBuffer base set to 0x50000000. my memory goes from 0x40000000-0x80000000. i see a semi random pixel pattern on screen. but if i run a mem_test 0x50000000 0x100000, for example, there's no change. i think that the LiteDRAMDMAReader is somehow reading a different location. what could be the issue? | 10:47 |
| minute | i can read video_framebuffer_dma_offset and i see it is cycling. | 10:48 |
| minute | and the video_framebuffer_dma_base is > 0xf0009800 00 00 00 50 | 10:49 |
| minute | if i do mem_copy 0x50000000 0x40000000 0x100000 i also see no change on screen | 10:50 |
| minute | but mem_read 0x50000000 shows all 0xff now, so def. the content has changed | 10:51 |
| minute | is there some kind of mmu remapping involved so that i have to give the videoframebuffer a different address than the physical memory address, _florent_ ? | 10:51 |
| minute | i'm building vexriscv with --cpu-count 1 --with-coherent-dma | 10:51 |
| minute | if i do mem_write 0xf0009800 0x40000000 to change the dma base address, i can see different pixel content, but instead of all white it is just a different semi-random pattern (looks like uninitialized memory). so the base address does _something_, but does not point at the expected memory address | 10:55 |
| minute | aha, mem_write 0xf0009800 0x10000000 gives me all white! | 10:55 |
| minute | so the video dma base has to be 0 if it has to read from the start of dram | 10:56 |
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| gatecat | slagernate: unfortunately, this seems like it's probably a problem somewhere in the oss stack - testing with the evn board radiant works but oxide doesn't | 12:11 |
| gatecat | I will try and investigate but that is unlikely to be before next week as I'm heading out for some time afk fairly soon | 12:11 |
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| gatecat | slagernate: as a workaround for now, using picorv32 instead of vexriscv works | 12:17 |
| gatecat | (I think the problem might be somewhere in memory inference and related to the vexriscv caches but don't hold me on that one, still doing some investigation) | 12:17 |
| gatecat | slagernate: one last notif I promise :D if you want to try living on the wild side vexriscv hopefully works too with the patch in this last comment: https://github.com/YosysHQ/yosys/issues/3416#issuecomment-1249317118 | 12:44 |
| gatecat | I'm building the SoC from litex-boards with `python ~/litex-boards/litex_boards/targets/lattice_crosslink_nx_evn.py --toolchain oxide --build` for reference | 12:45 |
| MoeIcenowy | BTW I saw RocketChip tagged 1.4 today | 13:17 |
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| somlo | maybe it's time for an update to `pythondata-cpu-rocket` :) | 14:08 |
| somlo | I was planning on that before diving into trying to debug Fedora booting on litex+rocket, but $DAYJOB keeps getting in the way... | 14:09 |
| minute | there's no linux driver for litex i2s yet, correct? | 14:30 |
| somlo | minute: this is the most up to date list of out-of-tree litex drivers I'm aware of: https://github.com/torvalds/linux/compare/master...litex-hub:linux:litex-rebase | 14:50 |
| minute | somlo: thanks! | 14:50 |
| somlo | I try to keep things up to date w.r.t. the linus tree here: https://github.com/litex-hub/linux/tree/litex-rebase | 14:52 |
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| slagernate | gatecat: sadly, litex_term is still hanging for me even when using picorv also, likely this is a simple mistake of mine, but when using radiant as toolchain, synpwrap is failing with `Fail to run synpwrap -prj lattice_crosslink_nx_evn_impl_synplify.tcl -log lattice_crosslink_nx_evn_impl.srf` and `@E| Mal-formed command line - please check for extra | 23:19 |
| slagernate | quotes in macro specification' | 23:19 |
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