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AM37x: How to boot from uart3? How to write x-load and uboot into NAND if there is no bootable media on EVM board?

Other Parts Discussed in Thread: FLASHTOOL

Hello all:

I am wondering how to boot from uart3 directly? I set SW4 to peripheral boot(2,4 on , others off), and use the FlashTool v1.0 to write $TI_INSTDIR\Target\MLO and $TI_INSTDIR\Target\u-boot.bin into SDRAM by selecting "download and execute". but nothing happens after the "Console program success, exit code: 0" shows on the output of FlashTool.

I also found the following article:

http://elinux.org/BeagleBoardNAND

which need a mmc boot into u-boot first and then use u-boot to write the x-load and u-boot into NAND.

The road I want to find is to boot the board directly from UART3 and flash the x-load and u-boot into NAND, then reset the board to make it boots from NAND. (assume no MMC on board and the NAND is empty before flashing.)

Is it possible for AM37x(Mistral AM37x EVM3730 revG)?