這是TI dm6446 EVM board 的UBL，它支源 Nand/NOR/UART 開機，此為CCS 裡的專案，下載解開後直接邊譯即可,This is TI dm6446 EVM board of UBL, the source of its support Nand/NOR/UART boot, this is a project in the CCS, download and unzip, then you can be directly compile it