Configuration
    - Open config.ini
    - Modify [serial] section's port
    - Modify [tftp] section's client/server. Remember to set the IP address in your
    PC which connects to the switch

Run
    - In DOS mode, enter into the program's folder
    - Run uboot_upgrade.exe and .\tftpd32.452\tftpd32.exe will execute automatically
    ex:
        C:\ECS4510_uboot_upgrade_v0.0.1>uboot_upgrade.exe
    - Turn on the power for switch 

Note:
    - Please make the firewall to allow the TFTP service in order to upgrade successfully