How can I make my MEK enter U-Boot fastboot mode?

[jumogehn]

I am reading the Android Automotive User's Guide.

And It guides to enter U-Boot fastboot mode. But I cannot make my 8QuadMax MEK enter the U-Boot fastboot mode.

1. downloaded prebuilt android automotive image and installed it via uuu.

2. downloaded and compiled all NXP's source code:

source build/envsetup.sh
lunch mek_8q_car-userdebug
./imx-make.sh -j4 2>&1 | tee build-log.txt

3. I configured usb debugging on under developer option from the android setting.

4. set the SW2 to 000100.

5. adb devices shows the device code. I can enter the adb shell.

6. adb reboot fastboot works

7. I can select below from a screen named fastbootd

Reboot system now

Enter recovery

Reboot to bootloader

Poweroff

8. Reboot to bootloader seems what I must select but it doesn't....

How can I make my MEK enter U-Boot fastboot mode?

After I make my MEK enter U-Boot fastboot mode, I will do the following:

sudo ./fastboot_imx_flashall.sh -f imx8qm -a -e -D /imx_android-13.0/mek_8q_car/

to flash all compiled binary into my MEK.

[JorgeCas · Accepted solution]

Hello,

To enter in fastboot mode you need:

1. Turn on the board and stop boot flow pressing any key to enter in U-boot.

2. In U-boot enter next command:

fastboot 0

Best regards.

[jumogehn]

Hi JorgeCas,

Yes! Your were right!

But I found some mysterious behavior.

To read debug messages during booting and enter uboot command I had to connect serial - microUSB B and microUSB C both not only one! to host PC. This is a mystery!

With these two USB cables connected, I had to do:

$sudo minicom -D /dev/ttyUSB0

Thank you very much!