Thanks, Joan! But I can't resolve the problem by the instruction you provided. I use the following one, and it seems working well:
uuu -b emmc_all u-boot-imx6ull14x14evk_sd.imx fsl-image-validation-imx-imx6ul7d.sdcard
So is it OK?
Now, another problem is encounterd. I know, if the USB-UART device is plugged to the USB slot, the name will be given of ttyUSB0, and it's shown under the folder of /dev. And there are 5 serial ports on my development board, but it just shown the ttymxc0 and ttymxc1, and the ttymxc0 is also the one connected the terminal. And my question is how to show the other 3 serial ports. I'll appriciate if you can help me.
It's the serial instruction screenshot for reference(MCU:imx6ull6y2dvm05aa).
在 2019-09-11 16:29:49，"joanxie" <email@example.com> 写道：
reply from Joan Xie in i.MX Processors - View the full discussion
you need to use the command "uuu.exe uuu.auto" as I metioned before, pls try it again
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