https://github.com/thotypous/tangnano9k-bsv-uart-test

UART test for Tang Nano 9k in Bluespec, synthesis with yosys+nextpnr
https://github.com/thotypous/tangnano9k-bsv-uart-test

Last synced: about 1 month ago
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UART test for Tang Nano 9k in Bluespec, synthesis with yosys+nextpnr

• Host: GitHub
• URL: https://github.com/thotypous/tangnano9k-bsv-uart-test
• Owner: thotypous
• Created: 2024-04-29T23:53:31.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2024-05-31T23:35:34.000Z (7 months ago)
• Last Synced: 2024-06-01T20:18:19.968Z (7 months ago)
• Language: Verilog
• Size: 14.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Environment

Use `bluespec-git`, `bluespec-contrib-git`, `yosys-git` and `nextpnr-git` from [Chaotic AUR](https://aur.chaotic.cx), or [docker-fpga-builder](https://github.com/thotypous/docker-fpga-builder).

# Running

```

make load

```

# Caveats

USB UART in Tang Nano 9k is an emulated FTDI which seems to be a little buggy.

The only way I found to reliably set the baud rate was a combination of GNU screen and picocom. Right after loading the bitfile to board, run:

```

screen /dev/ttyUSB1 3000000,cs8,-parenb,cstopb

```

Then close GNU screen by typing `Ctrl+a k y`.

Finally, run picocom and have fun:

```

picocom -b 3000000 -d 8 -p 1 -y n /dev/ttyUSB1

```