Ning Sun,
I understand that, you can build and run the other example project successfully.
Only you have problem with hua demo and NDK hello world example.
You can follow the steps for making your board correctly,
http://processors.wiki.ti.com/index.php/TMDSEVM6657L_EVM_Hardware_Setup
If you are using Windows 7, install and run CCS/BIOS MCSDK in administrator mode, this will rule out issues with CCS start-up and RTSC component recognition.
I hope, you know how to use CCS to connect the target,Please see this wiki for making the setup, connect the target and successful run.
http://processors.wiki.ti.com/index.php/BIOS_MCSDK_2.0_Getting_Started_Guide#Use_JTAG_to_Load_the_Application