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Update sipeed_tang_nano_9k.py so serial works #564

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@blark blark commented Feb 14, 2024

I wanted to save folks the three hours of troubleshooting why there was no serial terminal that I went through yesterday :) I confirmed that with these lines uncommented I cannot connect to the device, when I comment them out the terminal/bios works fine.

Commenting these lines out was the advice I found in a number of issues. I am not sure why it's not in the board file already, I figured I'd try and help out.

I wanted to save folks the three hours of troubleshooting why there was no serial terminal that I went through yesterday :) I confirmed that with these lines uncommented I cannot connect to the device, when I comment them out the terminal/bios works fine.

Commenting these lines out was the advice I found in a number of issues. I am not sure why it's not in the board file already, I figured I'd try and help out.
@trabucayre
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Hi,
As mentioned in another issues, tang nano 9k FPGA is quite small: shipping CPU firmware is an extra cost (RAM, FF, ...). Of course it's possible to do like that but free space, for extra cores, wil be near to 0...
Have you tried to write the firmware using external flash (as required):

openFPGALoader --external-flash -o 0 build/sipeed_tang_nano_9k/software/bios/bios.bin

?

Thanks

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