i.MX ProcessorsのトピックRe: can't boot from emmc

can't boot from emmc

jiejia — Tue, 20 Oct 2015 00:59:12 GMT

My custom board: reference mx6q_sabresd BSP: L3.0.35_4.1.0 MFG tool: Mfgtools-Rel-4.1.0_130816_MX6Q_UPDATER

I download image to emmc using mfgtool. I make the board boot from fuses, but the mfgtool still display HID-compliant device.

I am sure my board would boot from emmc because I write fuses in mfgtool to make it boot from emmc, and I can see pulse in the pin of SD4_CMD.

In ud.xml, download u-boot: dd if=$FILE of=/dev/mmcblk0boot0 bs=512 seek=2 skip=2. I enter u-boot command line in another way, and display the 100 word of the emmc from positon of 1k. I found it's different from thethe position of 1k in u-boot.bin . It's strange.

Re: can't boot from emmc

igorpadykov — Tue, 20 Oct 2015 01:53:10 GMT

Hi jie

except mfg tools one can write eMMC using NFS, please look

at attached Linux Guide sect.7.2.2 eMMC4.4 on SDHC4.

Also check if kernel boot command is correct, sect.9.2 Running the Image from

MMC/SD. It may be useful to check eMMC signals on oscilloscope

to check what commands fails.

Best regards

igor

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