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can not find ti814x_hdvpss_512M.xem3

My custom boader used dm8148 with 512M DDR3,and  devlopment enviroment is ti-ezsdk_dm814x-evm_5_05_01_04 .

According to VPSS_Video_Driver_User_Guide.pdf, For the DM814X/AM387X platform, two different M3 firmwares, ti814x_hdvpss_512M.xem3 and ti814x_hdvpss_1G.xem3 are provided to support 512M DDR3 EVM and 1GB DDR3 EVM.

But now in my filesystem,there is only three xem3 files at dir {ezsdk}/board-support/prebuilt-images/ .

dm814x_hdvicp.xem3                    (for hdvicp)

dm814x_hdvpss_v4l2.xem3           (for omx v4l2)

dm814x_hdvpss.xem3                    (for 1G hdvpss)

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I will run the demo saLoopBackFbdev.c,How can I get or create the ti814x_hdvpss_512M.xem3

Thanks