[FAQ] TDA4VM: How to boot TDA4VM from eMMC UDA partition using SBL in SDK 8.1

Hi,

Please follow the procedure below:

Partitioning the eMMC

1) Boot the board with j721e Linux SDK.

• You can find latest Linux SDK here
• Prepare the SD Card with Linux Images. Follow the procedure here
• Copy mksdboot.sh from <Linux_SDK_Install_Directory>/bin to /media/$USER/rootfs/home/root
• Change boot mode setting to SD boot mode:
  • SW8: 1000_0010
  • SW9: 0000_0000
• Boot the board
• login as root
• Run the mksdboot.sh script
  • ./mksdboot.sh --device /dev/mmcblk0
• run fdisk -l to check if the /dev/mmcblk0 is partitioned

Modifying the MMCSD SBL to boot from eMMC.

1) Replace the sbl_mmcsd.c at <pdkInstallPath>\packages\ti\boot\sbl\src\mmcsd

• You can find latest RTOS SDK here

2) Rebuild the lib and binary for MMCSD

• Switch to PDK\package\ti\build directory
• gmake BOARD=j721e_evm CORE=mcu1_0 sbl_lib_mmcsd_clean
• gmake BOARD=j721e_evm CORE=mcu1_0 sbl_mmcsd_img_clean
• gmake BOARD=j721e_evm CORE=mcu1_0 sbl_lib_mmcsd
• gmake BOARD=j721e_evm CORE=mcu1_0 sbl_mmcsd_img

Flashing RTOS Boot Images on eMMC

1) Put the SD Card on a PC

2) Copy the below files in /media/$USER/rootfs/home/root :

• <pdkInstallPath>\packages\ti\boot\sbl\binary\j721e_evm\mmcsd\bin\sbl_mmcsd_img_mcu1_0_release.tiimage renamed as tiboot3.bin
• <pdkInstallPath>\packages\ti\drv\sciclient\soc\V1\tifs.bin
• <pdkInstallPath>\packages\ti\binary\board_diag_led\bin\j721e_evm\board_diag_led_mcu1_0_release.appimage renamed as app

3) Put the SD Card back to board and boot in SD boot mode.

4)  Copy the images to eMMC partition

• mkdir eMMC
• mount /dev/mmcblk0p1 eMMC
• cp tiboot3.bin eMMC
• cp tifs.bin eMMC
• cp app eMMC

5) You can also refer to the AppNote- https://www.ti.com/lit/pdf/spracy5 for more other flashing techniques.

Change boot mode to eMMC and boot the board

1) Change boot mode to eMMC boot

• SW8: 1000_0000
• SW9: 0000_0000

Please see eMMC_Logs for reference.

Regards,
Parth