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Recovery: (too) short delay between UMS and Maskrom modes


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I am playing around with customizing my boot script (to install later my custom distro), and I am fighting with the Recovery.

I took a long time to understand I have to press the recovery button during a "long time", then release it very quickly to get the UMS mode and not falling into the Maskrom mode.


Indeed, when U-Boot detects the recovery button keypress, it proposes UMS, then very shortly after the Maskrom mode.


Is it possible to configure U-Boot to wait longer on the UMS mode,  let's say 5 seconds, and after that delay switch to Maskrom mode as latest failover?


For info: I have Armbian running on EMMC, and I play within the /boot folder, then roll-back my trials in Recovery/UMS mode.


Kind regards,

Xavier Miller.

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As we have mentioned on the wiki, you can watch the System LED as visual cue. When it blink once, release the button.

There are roughly 2 second delay to release the button.



Another visual cue you can check is through serial console.

U-Boot 2020.07-armbian (Nov 23 2020 - 16:22:15 +0100)

SoC: Rockchip rk3399
Reset cause: POR
DRAM:  3.9 GiB
PMIC:  RK808
SF: Detected w25q128 with page size 256 Bytes, erase size 4 KiB, total 16 MiB
MMC:   mmc@fe320000: 1, sdhci@fe330000: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Model: Helios64
Revision: 1.2 - 4GB non ECC
using mmc0 device for download mode
rockchip_dnl_mode = ums mode

as soon as you see rockchip_dnl_mode = ums mode, release the button.

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