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Setup TFTP Server
Introduction
Setting up a TFTP server inside U-Boot is very simple, and many guides are also available via Google.
Setup TFTP
Ubuntu 16.04
Install TFTP packages:
$ sudo apt-get install openbsd-inetd tftpd tftp
- Configuration
As root, enable the TFTP server by editing `/etc/inetd.conf`. Locate the line that looks similar to:
# tftp dgram udp wait root /usr/sbin/tcpd /usr/sbin/in.tftpd
Uncomment this line, and add the option and value `-s /srv/tftp` to the end of this line:
# tftp dgram udp wait root /usr/sbin/tcpd /usr/sbin/in.tftpd -s /srv/tftp
Create and modify permissions on the TFTP root directory:
$ sudo mkdir /srv/tftp $ sudo chown -R $(whoami) /srv/tftp
Restart the TFTP Service:
$ sudo /etc/init.d/xinetd restart
Ubuntu 18.04 or newer
Install additional TFTP packages:
$ sudo apt-get install tftp-hpa tftpd-hpa
- Configuration
As root, edit `/etc/default/tftpd-hpa`, and locate the line that looks similar to:
TFTP_DIRECTORY="/usr/lib/tftpboot"
Change the dir to `/srv/tftp`.
TFTP_DIRECTORY="/srv/tftp"
Create and modify permissions on the TFTP root directory:
$ sudo mkdir /srv/tftp $ sudo chown -R $(whoami) /srv/tftp
Restart the TFTP Service:
$ sudo service tftpd-hpa restart
Setup TFTP on a Target Device
To setup TFTP on a target device, you will need to:
- Connect a LAN cable to your target device, and make sure your device is on same local network with your Host PC.
- Connect a “Serial-To-USB Module” between the target device and Host PC and ensure you have done the correct [setup](SetupSerialTool.html).
- Power-on your target device, and ensure the device has a bootloader installed in it.
Stop U-boot from autobooting by hitting `Enter` or `Space` at the moment you power-on your target device:
U-Boot 2015.01 (May 18 2019 - 19:31:53) DRAM: 3.8 GiB Relocation Offset is: d6e56000 ... gpio: pin GPIOAO_7 (gpio 7) value is 1 Hit Enter or space or Ctrl+C key to stop autoboot -- : 0 kvim3#
Setup the ip address of the target client and TFTP host server:
kvim3# setenv ipaddr 192.168.1.249 kvim3# setenv serverip 192.168.1.117
Save the settings:
kvim3# saveenv Saving Environment to aml-storage... mmc env offset: 0x6c00000 Writing to MMC(1)... done kvim3#
Running `saveenv` will save the env values to the env partition on the eMMC. You can run `defenv` to restore the env to the default values.
Please confirm that your configuration is correct.
e.g.
kvim3#print ipaddr ipaddr=192.168.1.249 kvim3#print serverip serverip=192.168.1.117
Test Your TFTP Server
VIM1/VIM2/VIM3/VIM3L is u-boot.bin, VIM4 is u-boot.bin.signed.
Make sure you have copied the testing file to the TFTF root path:
$ ls /srv/tftp/u-boot.bin /srv/tftp/u-boot.bin
Load a file into the `0x1080000` address:
kvim3# tftp 1080000 u-boot.bin Speed: 1000, full duplex Using dwmac.ff3f0000 device TFTP from server 192.168.1.117; our IP address is 192.168.1.249 Filename 'u-boot.bin'. Load address: 0x1080000 Loading: ################################################################# ################################################################# ############################################### 2.5 MiB/s done Bytes transferred = 1371504 (14ed70 hex)
If all went well, the terminal print-out should appear similar to what is shown above.
Troubleshooting
- Check your LAN cable connection, if the terminal print-out looks like:
kvim3# tftp 1080000 u-boot.bin dwmac.ff3f0000 Waiting for PHY auto negotiation to complete......... TIMEOUT ! dwmac.ff3f0000: No link. kvim3#
- Check your server IP or filename address, if the print-out looks like:
kvim3#tftp 1080000 u-boot.bin Speed: 1000, full duplex Using dwmac.ff3f0000 device TFTP from server 192.168.1.177; our IP address is 192.168.1.249 Filename 'u-boot.bin'. Load address: 0x1080000 Loading: T T T T T T T T T T Retry count exceeded; starting again Speed: 1000, full duplex
In this example, I had set the server IP address to `192.168.1.177` which is incorrect. It should be `192.168.1.117` instead.
See Also
- [Ubuntu Wiki: TFTP](https://help.ubuntu.com/community/TFTP)
* [Configuring TFTP servers on Linux](http://venkateshabbarapu.blogspot.com/2012/10/configuring-tftp-server-for-linux.html)