########## SW1 was pressed.
TFTP IP address : 192.168.0.100
TFTP IP address (32 bit) : 0xC0A80064
[TFTP_read_request] Set Tftp Server : 0xc0a80064
>> TFTP RRQ : FileName(test.txt), Mode(octet)
[recv_tftp_packet] Set Server Port : 49769
<< TFTP_OACK : 
>> TFTP ACK : Block Number(0)
<< TFTP_DATA : opcode(3), block_num(1)
++Data #1-109:
#1 Hello to TFTP server!
#2 Hello to TFTP server again!
#3 It works!
#4 New string for test..
#5 Bumped :))


>> TFTP ACK : Block Number(1)