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add transmit-only UART example #41

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programmerjake merged 4 commits from programmerjake/fayalite:add-uart-example into master 2025-10-23 03:36:39 +00:00
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@ -45,6 +45,36 @@ To program the Flash also, so it stays programmed when power-cycling the board:
sudo openFPGALoader --board arty_a7_100t -f target/blinky-out/blinky.bit
```
# Building the [Transmit-only UART example] for the Arty A7 100T on Linux
[Transmit-only UART example]: crates/fayalite/examples/tx_only_uart.rs
Follow the steps above of building the Blinky example, but replace `blinky` with `tx_only_uart`.
View the output using [tio](https://github.com/tio/tio) which you can install in Debian using `apt`.
Find the correct USB device:
```bash
sudo tio --list
```
You want the device with a name like (note the `if01`, `if00` is presumably the JTAG port):
`/dev/serial/by-id/usb-Digilent_Digilent_USB_Device_210319B4A51E-if01-port0`
Connect to the serial port:
```bash
sudo tio -b115200 /dev/serial/by-id/put-your-device-id-here
```
You'll see (repeating endlessly):
```text
Hello World from Fayalite!!!
Hello World from Fayalite!!!
Hello World from Fayalite!!!
```
Press Ctrl+T then `q` to exit tio.
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