= 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:
  a. Hold down the S2 button in the middle of the USRP's motherboard while power-cycling the USRP
  b. 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
}}}