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AM437x GP EVM network booting

Hi ,

  I am trying to do network boot on AM437x GP EVM . I followed the below link to do the same

http://processors.wiki.ti.com/index.php/Ubuntu_12.04_Set_Up_to_Network_Boot_an_AM335x_Based_Platform

The above link is for AM335x devices. I modified the dhcpd.conf as below

1) Added the below lines

elsif substring (option vendor-class-identifier, 0, 10) = "AM43xx ROM"

{

      filename "u-boot-spl.bin"

}

  Also placed the u-boot-spl.bin in /tftpboot folder

I verified my host PC tftp and dhcp server are running properly. In fact i am able to transfer files from one PC to other PC through tftp and hence i think tftp and dhcp servers are proper.

Also i changed the switch settings as per TRM. SYSBOOT[4:0] = 11100b, SYSBOOT 5,6,9,12,13 = 0XX00

But after powering on the board i don't see anything on the serial console.Is there anything i am missing.

Thanks and Regards,

Sai