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TMS320DM8127: TMDCSKCC bringup

Part Number: TMS320DM8127

I try to bringup the DM8127 development kit, following the user guide. However, it keep display CCCCCCC in TeraTerm terminal. 

I also try to rewrite image file in sd card by following instructions in this link http://processors.wiki.ti.com/index.php/IPNC_RDK_DM38x_,_DM8127 , but it still display CCCCCCC

Somebody help me solve this problem, thank you.