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trabucayre / openFPGALoader

Universal utility for programming FPGA
https://trabucayre.github.io/openFPGALoader/
Apache License 2.0
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Tang Nano stuck at 99% #49

Closed pepijndevos closed 4 years ago

pepijndevos commented 4 years ago

I'm trying to program the Tang Nano but it gets stuck at 99%

$ openFPGALoader -b tangnano ../pack.fs 
Parse ../pack.fs: 
00
Done
erase SRAM Done
Flash SRAM: [==================================================] 99.902534%^C

My git reflog looks as follows:

a220226 (HEAD -> master, origin/master, origin/HEAD) HEAD@{0}: pull: Fast-forward
7a8b80d (origin/cxxopts_migration) HEAD@{1}: pull: Fast-forward
414e6ee HEAD@{2}: clone: from https://github.com/trabucayre/openFPGALoader.git

The oldest commit does not support the Tang Nano, and neither of the newer ones work. Now that I think about it I'm not sure I ever used OpenFpgaLoader with Tang Nano or only with the Trenz GW1NR-9 board.

pepijndevos commented 4 years ago

I have tested with another bitstream and precompiled binary with the same results. I have attached a strace and bitstream in case it is helpful.

pack.zip strace.txt

trabucayre commented 4 years ago

could you try with -v (verbose) I suspect you will see long list of pollFlag: xxxx If I'm true it's not a regression but the FPGA in a wrong state. I need to to find how to unlock the FPGA (it's done by gowin programmer) but datasheet has missing informations for this topic.

pepijndevos commented 4 years ago

For reference, I tried it and the FPGA finished programming. Apparently it was indeed in a wrong state.

TheFlav commented 3 years ago

I have this problem. If I use the -v, I do get a long list of pollFlag messages. Is there a workaround? I thought that maybe updating to a new ch552 firmware would help, but I don't think it has (or I have the wrong one). Any ideas?

EDIT: I built https://github.com/racerxdl/tangnano-yosys-hello and that was able to upload to my board. I was previously trying to upload the example pack.fs from apicula. Note that "openFPGALoader -b tangnano blinky-tangnano.fs" from apicula also succeeds.

trabucayre commented 3 years ago

I have lately tested different version of ch552 firmware with an external MCU, behaviour is more or less the same...

But according to your EDIT and apicula's issue I suspect an incompatible bitstream (built for a different device). A check for device and bitstream IDCode must be added and load the fs only if it's targeted for connected FPGA.