The Development Kit is delivered with a pre-flashed bootloader. The following instructions for flashing images from SD card will be useful if you want to:
The images to be flashed will need to be copied to the /boot or /rootfs/boot/ partition of a properly formatted SD card as described in the Creating a Bootable SD Card instructions.
The Linux commands listed in this section will only work correctly if Linux is booted from SD card. |
Write a GPT partition table to eMMC. Create UUIDs for the disk and each partition by executing the following on the host machine:
uuidgen <first UUID> uuidgen <second UUID> uuidgen <third UUID> |
After making all required connections, power on the board and enter U-Boot. Set the UUIDs for the disk and rootfs to the generated values:
setenv uuid_gpt_disk <first UUID>
setenv uuid_gpt_rootfs <second UUID>
setenv uuid_gpt_env <third UUID>
gpt write mmc 1 ${partitions}
reset |
The gpt partition will be visible after a reset. (Note that mmc0 corresponds with the SD card slot interface, while mmc1 corresponds with eMMC):
mmc dev 1 mmc part |
Boot into Linux from the SD card, then use fdisk with the following options to write a new GPT partition table to eMMC:
fdisk /dev/mmcblk1 g GPT partition table n new partition 1 partition number 2048 first sector 4096 last sector n new partition 2 partition number 6144 first sector <enter> use default value w write table to disk and exit partprobe |
Flashing the boot loader from U-Boot
Copy the MLO and u-boot.img from the /boot partition of the SD card (connector X2, mmc0 in U-Boot) to eMMC (mmc1 in U-Boot):
mmc dev 1
fatload mmc 0 ${loadaddr} MLO
echo $filesize
# In the following command, take the hex value from the above command, divide it by 0x200, and round up to the nearest whole number
mmc write ${loadaddr} 0x100 #FILESIZE#
fatload mmc 0 ${loadaddr} u-boot.img
echo $filesize
# In the following command, take the hex value from the above command, divide it by 0x200, and round up to the nearest whole number
mmc write ${loadaddr} 0x300 #FILESIZE# |
Boot into Linux from the SD card and run the following commands to copy MLO and u-boot.img to eMMC:
dd if=/run/media/mmcblk0p1/MLO of=/dev/mmcblk1 seek=256 dd if=/run/media/mmcblk0p1/u-boot.img of=/dev/mmcblk1 seek=768 |
If rootfs.ext4 is larger than the size of the DDR3, it can only be flashed in Linux. The default rootfs.ext4 for BSP-Yocto-TISDK-AM57xx-PD19.1.0 is larger than the default DDR3 size (2GB). |
The rootfs.ext4 image is not loaded to the card by default. Copy it to the root of the rootfs partition on the SD card. |
Boot into Linux from the SD card, then copy the root filesystem to eMMC:
dd if=/rootfs.ext4 of=/dev/mmcblk1p2 bs=1M |
This assumes the SD card was created with TI's create-sdcard.sh script. If the SD card is formatted differently, the ext4load command may need to be replaced by fatload. |
Copy the root filesystem from the /rootfs partition of the SD card (connector X2, mmc0 in U-Boot) to eMMC (mmc1 in U-boot):
mmc dev 1
ext4load mmc 0:2 ${loadaddr} rootfs.ext4
mmc write ${loadaddr} 0x1800 [rootfs.ext4 size in bytes divided by 512, in hex] |