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VIM2 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.
- Power-on your target device, and ensure the device has a bootloader installed in it.
Stop U-boot from autobooting by hitting 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
VIM1/2/3/3L 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.