>>>>> "Julia" == Julia Royer via Devel <devel@sel4.systems> writes:

Julia> I'm using an RS232-to-USB adapter, connecting only the necessary
Julia> pins, and I’ve already tested that the cable is working. 

RS232 voltage levels are ±12V --- if you connect these to the Odroid
sooner or later you will destroy it, as the Odroid C4 uses 0 and 3.3V
signalling levels.

The seL4 images use the /soc/bus@ff800000/serial@3000 UART which is
brought out to the 4-pin connector at the end of the Odroid C4
board. Is this the one you're using? (labelled 'I' on this image:
https://cdn.hardkernel.com/wp-content/uploads/2020/04/C4_board_h1.jpeg
)

-- 
Dr Peter Chubb                https://trustworthy.systems/
Trustworthy Systems Group                        CSE, UNSW
Core hours: Mon 8am-3pm; Wed: 8am-5pm; Fri 8am-12pm.
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