Troubleshooting

Networking¶

How do I configure a static IP address?¶

By default PandA uses DHCP. To set a static address, edit config.txt on the SD card and uncomment or add the relevant lines:

ADDRESS = 192.168.0.2
NETMASK = 255.255.255.0
GATEWAY = 192.168.0.254
HOSTNAME = mypanda

See How to get a PandA on the network without DHCP for the full config.txt format and the USB override mechanism (no SD card access required).

How do I disable subnet validation in the web control?¶

Create an empty file called no-subnet-validation under state/options/ on the SD card.

How do I authorise a public SSH key?¶

Add the public key to a file named authorized_keys on the SD card, or load it from a USB stick via Web Admin → SSH Keys → Append SSH keys from USB.

Boot and recovery¶

How do I recover from a catastrophic configuration change?¶

Remove the file changes.ext4 from the SD card. This discards all configuration changes and resets the PandA to factory defaults.

How do I load the full rootfs to RAM at boot?¶

Create an empty file called to-ram on the SD card.

What do I do if the system freezes after loading the FPGA?¶

Create an empty file called no-fpga on the SD card. The FPGA loader will skip loading the bitstream, which lets you try alternative bitstreams manually.

FPGA bitstream¶

How do I override the FPGA bitstream variant used?¶

By default PandA reads the FMC EEPROM and selects the bitstream whose FMC requirements are satisfied. If no EEPROM is found the no-fmc variant is used.

To force a specific bitstream, set APP in config.txt:

APP = pandabox-fmc-acq430

This takes effect only if the corresponding FPGA variant package is installed. See Choose the FPGA bitstream for the full bitstream selection mechanism.