Hi,
We just upgraded to the DM368EVM from the DM365EVM. We had no problem booting the DM365EVM from NAND, but nothing comes out of the serial head when trying to boot the DM368EVM. I suspected that maybe there was no UBL/U-boot in the NAND from the factory, so I followed the directions here:
http://processors.wiki.ti.com/index.php/UG:_DaVinci_PSP_Installation_on_DM36x_EVM#Flashing_DM36x_EVM_.28PG_1.2_Silicon_or_newer.29_using_Serial_flash_utilities
...to load the ubl_DM36x_ARM432_DDR340_OSC24_NAND.bin and u-boot.bin to the EVM NAND. This process appeared successful, but setting SW4 to all OFF and rebooting again produces no output from the serial head.
If I set SW4 for MMC/SD boot and use the SD card provided with the board, the EVM boots just fine and I see the serial output, so it's not anything to do with cabling. SPI boot is also fine, since the serial flasher utilities run successfully.
The UBL and U-boot binaries are built from the DaVinci PSP-SDK 03.21.00.04, following the directions under "Rebuilding U-Boot" and "Building the User Boot Loader (UBL)" in the above link..
Any insight appreciated...