Can Serial Downloader be triggered from uboot/userspace?

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Can Serial Downloader be triggered from uboot/userspace?

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dav1
Contributor V

Is it possible (on the i.mx8 mini) to override the BOOT_MODE pins (via code/register write) to enable the Serial Downloader (without having to physically change the boot-pins)

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art
NXP TechSupport
NXP TechSupport

No, it is not possible to override the BOOT_MODE[1:0] settings in software without physically switching the BOOT_MODE[1:0] pins.

Best Regards,

Artur

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dav1
Contributor V

Hi Artur,

iMX7's u-boot's bmode usb command writes to gpr9 and gpr10 (general purpose registers). The same register on the imx8m mini's reference manual states these are "reserved for internal use"...

Can you please check with the i.mx8 team if these still exists but are not documented.

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art
NXP TechSupport
NXP TechSupport

The R&D have confirmed that there is no way to override the boot mode settings in software.

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dav1
Contributor V

FYI: fastboot can be used to override say emmc boot and instead jump into the serial-downloader mode.

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