IMX8M EVK can not use serial downloader by USB

[genggeng]

We have a I.MX8MQ EVK board，the version is B4.

It can boot to andriod system with emmc, and the debug usb-serial is well worked.

Now we want to update the system by USB serial downloader, do as the follow:

(1) Switch the bootmode of i.MX8MQ EVK SW802  BOOTMODE[1:0] from 10 to 01.

(2) Connecting J901(USB type-c) to PC USB by a USB 3.0 cable.

(3) Connecting J1701 to PC USB by a USB cable.

(4) Plugging 12V@5A adapter into Power Jack (J902)

(5) Power on I.MX8MQ board via SW701 Switch

We can see that the board is not booting from internal device, because of step 1.

But we can not use uuu or mfgtools to update the system, we have tried both on windows and Ubuntu.

Also we find there is not any HID compaliant device in the host PC.

is the TYPE-C USB serial downloader broken?

is there any methord to fix this problem?

thanks for your replay!

[Guohua_Liu]

Hello. Have you solved the problem? I meet the save problem now, but the board worked well before some days. Now it can boot the system we burned into it, serial port seems to work well.

[genggeng]

Our test OS is Win7 64bit and Ubuntu 16.04  64bit.

Today we have found the HID device, but only for one time.

[genggeng]

Before I can installer this driver， there should be a unkown divices。

I have tried any times poweroff and poweron the board, there is not any unkown divice apper.

[jimmychan]

Do you have another computer to try?

[genggeng]

yes，I have tried many computers， such as Win7 32bit，Win7 64 bit，and Ubuntu 16.04 64bit。

On these computers， all can NOT found a HID-complaint device.

also can not found a unkown-device which can install the drivers.

[jimmychan]

I run the L4.9.88_2.0.0_mfg-tool_MX8MQ on a new computer.

My board setting is like this:

I run the mfgtool2-yocto-mx8-evk-emmc1.vbs.

'HID' come out on the mfgtool.

[genggeng]

I have test the I.MX8M-EVK board with the same configuration as your above picture showed.

but still can not found the HID device.

[jimmychan]

Do you have another EVK board to try?

[genggeng]

Thanks, I will have a try with the Linux mfgtool.

[jimmychan]

In the mfgtool folder, there is a "iMX_BulkIO_Driver" in Drivers folder. Have you try to install this?

[genggeng]

Thank for your reply.

In the android P9, there is no mfgtool, and I will try this with android O8 mfgtool next Monday.

But when the board powered with serial downloader mode, 

I can not find the USB device with lsusb under Ubuntu OS, I think even without driver there should have a usb device,

and also, I can not see a unregistered device in Windows Device Manager.