IMX6ULL EMMC BOOT

stanleykwee — Wed, 30 Jan 2019 06:17:03 GMT

Hi all,

I'm using uuu to flash my imx6ullevk based custom board with Micron EMMC 5.0 MTFC4GACAJCN . EMMC is flashed ok and zImage, device tree and root file system are written OK in the EMMC but u-boot is not booting at startup.

1. The EMMC is set on usdhc2 position
2. After uuu completed with success, while power is kept, started uuu again in shell mode and issue command "FB: ucmd boot", the u-boot, kernel and the whole linux could boot up
3. And I'm using the u-boot-imx6ull14x14evk_emmc.imx file in L4.14.78_1.0.0_ga_images_MX6UL7D package.

However, if the board is power cycled and boot mode is set to internal boot on EMMC, nothing appears on my serial terminal.

What could be wrong?

Thanks in advance.

Re: IMX6ULL EMMC BOOT

igorpadykov — Wed, 30 Jan 2019 23:20:52 GMT

Hi Stanley

for new board one can try to run ddr test

i.MX6/7 DDR Stress Test Tool V3.00

and update ddr calibration coefficients in uboot/board/freescale/mx6ullevk/imximage.cfg

imximage.cfg\mx6ullevk\freescale\board - uboot-imx - i.MX U-Boot

Best regards
igor
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Re: IMX6ULL EMMC BOOT