By pure accident, I discovered that Ctrl-Alt-F1 while the P2 is booting brings up more options on mine that allows the deletion of firmware and clearing of emmc.

 

I have not done it but the menus are there.

I have tried the clearing of eMMC option. Unsurprisingly it cleared the eMMC and I can no longer boot to Station OS. I can still boot to Balbes' UPDATE_UBOOT image from SD card.

 

The other option is 'Delete bootloader'. I have not tried this but I think it must clear the SPI. You would definitely want a working uboot in eMMC before doing that. The question I have is if you do that and have an empty SPI will the bootrom go to the eMMC or will it hang?

 

Firefly have RK356x_NorFlash2eMMCLoader_20211209.img which suggests you need something in SPI (aka NorFlash) to redirect to the eMMC. This page goes into it. I don't have Windows, no longer have Station OS (so no ADB) and have so far failed to enter MaskROM mode so I'm a bit stuck.

15 часов назад, CryBaby сказал:

I have tried the clearing of eMMC option. Unsurprisingly it cleared the eMMC and I can no longer boot to Station OS. I can still boot to Balbes' UPDATE_UBOOT image from SD card.

 

The other option is 'Delete bootloader'. I have not tried this but I think it must clear the SPI. You would definitely want a working uboot in eMMC before doing that. The question I have is if you do that and have an empty SPI will the bootrom go to the eMMC or will it hang?

 

Firefly have RK356x_NorFlash2eMMCLoader_20211209.img which suggests you need something in SPI (aka NorFlash) to redirect to the eMMC. This page goes into it. I don't have Windows, no longer have Station OS (so no ADB) and have so far failed to enter MaskROM mode so I'm a bit stuck.

The procedure for finding and using the SPI - SD - eMMC bootloader. If you clear SPI and eMMC, the bootloader from the SD card should work. By the way, if you completely remove u-boot from SPI and eMMC, you can use two bootloader options to run from an SD card (and later install on eMMC) - the old 2017 or the new 2022.

 

Important - The new u-boot-2022 is not compatible with StationOS, i.e. you will not be able to use it with Android (StationOS)