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1.12.3. Keyboard Support

Problem: make system behaviour dependent on keys pressed at power-on

Solution: in U-Boot you can define one or more keys or key combinations and commands which are executed when these keys are pressed at power-on:

Example: after a software update, the user can select to boot the old software version ("run old_version") by holding the keys with keycodes "4c" and "51" at power-on.

1.12.2. Boot Count Limit 1. Abstract 1.12.4. Automatic Updates
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