How to Unbrick a USRP

N210

Do this if the USRP becomes unresponsive to normal commands and cannot be found with uhd_find_devices.

1. Load baseline_uhd.ndz onto a node with the extra ethernet card
2. Boot up the node
3. Download the latest firmware/UHD images to the node:

   uhd_images_downloader
   

4. Configure eth2 to be able to talk to the USRP

   ifconfig eth2 192.168.10.1 netmask 255.255.255.0
   

5. Remove lid of USRP
6. Connect the USRP's ethernet to the node
7. Put USRP in safe-mode:
   1. Hold down the S2 button in the middle of the USRP's motherboard while power-cycling the USRP
   2. Keep holding until the D & F status LED lights are stable and the left LED on the ethernet jack is green
8. Check if the node can see the USRP:

   uhd_find_devices --args="addr=192.168.10.2"
   

   If not, retry step 7
9. Burn new firmware and FPGA images directly to the USRP:

   usrp_n2xx_simple_net_burner --addr="192.168.10.2" --fw="/usr/share/uhd/images/usrp_n210_fw.bin" --fpga="/usr/share/uhd/images/usrp_n210_r4_fpga.bin" --dont-check-rev
   

10. Most likely the automatic reboot will fail so you will have to boot the USRP into safe-mode manually again
11. Write new default ip into EEPROM:

    /usr/lib/uhd/utils/usrp_burn_mb_eeprom --values="ip-addr=192.168.10.2"
    

12. Manually reboot the USRP into regular mode by just power-cycling it (do not hold down the S2 button)
13. Check if the node can see the USRP:

    uhd_find_devices --args="addr=192.168.10.2"
    

14. Test image loading:

    uhd_image_loader --args="type=usrp2,addr=192.168.10.2"
    

15. Check if everything shows up correctly (versions, daughter-boards, etc):

    uhd_usrp_probe