AM3352: AM3352 EMMC BOOT CONFIGURATION?

Eldhose Peter

Part Number: AM3352

Tool/software:

Hi,

In our new Sitara AM335x custom board contain only one storage device connected eMMC permanently. Before we had NAND flash storage. Now we are changing to emmc. So we need boot from the eMMC that

connected to MMC1 or MMC2. Our requirement is to update the whole OS ( including U-boot, kernel , am335x-evm.dtb , rootfs and all applications ) from any external SD card ( connected to MMC 0 slot ) or USB

storage device to EMMC and boot from that. We prefer USB drive. Is it possible boot from EMMC? if it bootable Which EMMC version can be used? How to include EMMC BOOT in U-Boot. Will u-boot recognize the EMMC?

4 months ago

0 Bin Liu 4 months ago

TI__Guru**** 168501 points

Hi Eldhose,

Yes, AM335x device can boot and run Linux from eMMC. The Beaglebone Black board has eMMC device on the board, and it can be flashed with Linux and boot from it.

You would need to configure the SYSBOOT pins to tell ROM to boot from eMMC, U-Boot will inherit the boot media information from ROM and continue to boot from eMMC.

0 Eldhose Peter 4 months ago in reply to Bin Liu

Prodigy 80 points

eMMC connected to MMC1 or MMC2. Will eMMC work in MMC1 and MMC2? If so , which is better option to boot from, SD card and copy to eMMC?

0 Bin Liu 4 months ago in reply to Eldhose Peter

TI__Guru**** 168501 points

Hi Eldhose,

Eldhose Peter said:
eMMC connected to MMC1 or MMC2. Will eMMC work in MMC1 and MMC2?

If eMMC is connected to MMC2 (the 3rd MMC interface), ROM won't be able to boot from eMMC. ROM can only boot from MMC0 or MMC1.

Eldhose Peter said:
which is better option to boot from, SD card and copy to eMMC?

Just use eMMC as regular block device in Linux, once boot Linux from SD card, partition, format, and mount the eMMC, then copy all the files to eMMC and umount it.

0 Eldhose Peter 4 months ago in reply to Bin Liu

Prodigy 80 points

Does it can be boot from usb storage device? if it can how does it work?

0 Bin Liu 4 months ago in reply to Eldhose Peter

TI__Guru**** 168501 points

No, the AM335x ROM does not support boot from USB mass storage device.

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AM3352: AM3352 EMMC BOOT CONFIGURATION?