root@EMMYS0683:/home/test/Desktop/lnt-boot-images# picocom -b 115200 /dev/ttyUSB0 --send-cmd "sx -vv"
picocom v1.7

port is        : /dev/ttyUSB0
flowcontrol    : none
baudrate is    : 115200
parity is      : none
databits are   : 8
escape is      : C-a
local echo is  : no
noinit is      : no
noreset is     : no
nolock is      : no
send_cmd is    : sx -vv
receive_cmd is : rz -vv
imap is        : 
omap is        : 
emap is        : crcrlf,delbs,

Terminal ready
CCCCCCCC
*** file: u-boot-spl.bin
sx -vv u-boot-spl.bin 
Sending u-boot-spl.bin, 562 blocks: Give your local XMODEM receive command now.
Xmodem sectors/kbytes sent:   0/ 0kRetry 0: Timeout on sector ACK
Retry 0: Timeout on sector ACK
Retry 0: Timeout on sector ACK
Retry 0: NAK on sector
Bytes Sent:  72064   BPS:277                             

Transfer complete

*** exit status: 0

U-Boot SPL 2016.05-00319-gcf14e635d7-dirty (Jun 13 2017 - 11:26:31)
Trying to boot from UART
C
*** file: u-boot.img
sx -vv u-boot.img 
Sending u-boot.img, 3502 blocks: Give your local XMODEM receive command now.
Xmodem sectors/kbytes sent:   0/ 0kRetry 0: NAK on sector
Bytes Sent: 448384   BPS:4561                            

Transfer complete

*** exit status: 0
xyzModem - CRC mode, 3504(SOH)/0(STX)/0(CAN) packets, 3 retries
Loaded 448354 bytes


U-Boot 2016.05-00319-gcf14e635d7-dirty (Jun 13 2017 - 11:26:31 +0530)

CPU  : AM335X-GP rev 2.1
Model: TI AM335x EVM
       Watchdog enabled
DRAM:  512 MiB
NAND:  256 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
MMC: no card present
** Bad device mmc 0 **
Using default environment

<ethaddr> not set. Validating first E-fuse MAC
Net:   Could not get PHY for ethernet@4a100000: addr 1
eth0: ethernet@4a100000
Warning: usb_ether MAC addresses don't match:
Address in SROM is         de:ad:be:ef:00:01
Address in environment is  ec:24:b8:72:20:9b
, eth1: usb_ether
Press SPACE to abort autoboot in 2 seconds
=> setenv autoload no
=> dhcp
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
BOOTP broadcast 6
BOOTP broadcast 7
BOOTP broadcast 8
BOOTP broadcast 9
BOOTP broadcast 10
BOOTP broadcast 11
BOOTP broadcast 12
BOOTP broadcast 13
BOOTP broadcast 14
BOOTP broadcast 15
BOOTP broadcast 16
BOOTP broadcast 17
BOOTP broadcast 18
BOOTP broadcast 19
BOOTP broadcast 20
BOOTP broadcast 21
BOOTP broadcast 22
BOOTP broadcast 23
BOOTP broadcast 24
BOOTP broadcast 25
BOOTP broadcast 26
BOOTP broadcast 27
BOOTP broadcast 28
BOOTP broadcast 29

Retry time exceeded; starting again
=> dhcp
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
BOOTP broadcast 6
BOOTP broadcast 7
BOOTP broadcast 8
BOOTP broadcast 9
BOOTP broadcast 10
BOOTP broadcast 11
BOOTP broadcast 12
BOOTP broadcast 13
BOOTP broadcast 14
BOOTP broadcast 15
BOOTP broadcast 16
BOOTP broadcast 17
BOOTP broadcast 18
BOOTP broadcast 19
BOOTP broadcast 20
BOOTP broadcast 21
BOOTP broadcast 22
BOOTP broadcast 23
BOOTP broadcast 24
BOOTP broadcast 25
BOOTP broadcast 26
BOOTP broadcast 27
BOOTP broadcast 28
BOOTP broadcast 29

Retry time exceeded; starting again