Development Board Tftp:timeout problem

There is a problem with tftp:timeout when you want to TFTP files from the PC:

: Tftp-gr Gprsapp 192.168.1.38
Tftp:timeout

Check the network, you can ping the PC. The TFTP server for the PC has also been opened, and it is also possible to test the TFTP data transfer from the Development Board to the PC: it is open when the TFTP server on the Development Board is explained.

: TFTP-PR gprsapph 192.168.1.38
GPRSAPPH 0% | | 0-stalled-
Tftp:timeout

At this point the problem of the firewall is suspected. Because there is no firewall on my development Board, it is possible that the firewall on my PC is organizing the TFTP program. My PC system is WIN8 system, open the firewall found that sure enough firewall opened:

Because the private network is a home network, data transfer under the same network segment is allowed. You just have to shut down the public network firewall.

Development Board Tftp:timeout problem