ETH burning is performed under uboot, so you need to make sure that uboot has been burned.

• Decompress tools/tools/Tftpd32.rar and enter the decompression directory, double-click to run ftpd32.exe, and start the tftp server:
• Enter uboot on the board and set the two environment variables ipaddr and serverip, and ensure that the board and the computer can communicate:
#setenv ipaddr 192.168.1.112
#setenv serverip 192.168.1.166
#saveenv
• Execute estar and start to update the system:
#estar