Running example designs¶

This section desribes how to properly connect your board. It also helps you configure and run any other software that is necessary to observe results.

Connecting development boards¶

Arty board¶

Connect the board to your computer using the USB cable:
Connect the board to your computer using the Ethernet cable (only if you want to test the LiteX Linux Example)

Basys 3 board¶

Connect the Basys3 Board to your computer using the USB cable:

Connecting to UART¶

First check available teletypes with:

ls -l /dev | grep ttyUSB

You should see at least one, e.g.:

crw-rw----+ 1 root  plugdev   188,   0 11-06 13:58 ttyUSB0
crw-rw----+ 1 root  plugdev   188,   1 11-06 13:58 ttyUSB1

Simply use picocom to connect:

picocom -b 115200 --imap lfcrlf /dev/ttyUSB1

Warning

Substitute 115200 with the baud rate that your design uses!

Warning

Please note that /dev/ttyUSB1 is just an example. The number appearing may change!

Note

If the picocom is unable to connect to any ttyUSBx device, you probably don’t have appropriate user permissions. On Debian distributions, type the command below to add the user to the dialout group. This should resolve the missing permissions problem:

sudo usermod -a -G dialout `whoami`

Setting up TFTP¶

It is assumed that the server is running on port 6069 and uses /tftp directory.

Install tftp with (Ubuntu example):
```
sudo apt install tftpd-hpa
```

Create a directory for the server:

sudo mkdir -p /tftp
sudo chmod 777 -R /tftp
sudo chown tftp -R /tftp

Set up your TFTP configuration with:

cat << EOF | sudo tee /etc/default/tftpd-hpa
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/tftp"
TFTP_ADDRESS=":6069"
TFTP_OPTIONS="--secure"
EOF

Restart the TFTP server:
```
sudo systemctl restart tftpd-hpa
```

Configuring your network interfaces¶

Check your network interfaces with:

ip link

Add IPv4 address to you interface:

ip addr add 192.168.100.100/24 dev eth0

Warning

192.169.100.100/24 and eth0 are just examples!