allwinner h616 + serial console glitch
- Reply: Marcin Cieslak : "Re: allwinner h616 + serial console glitch"
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Date: Mon, 26 Jun 2023 19:12:41 UTC
i have started to play / hack support with a h616 (an android tv box in fact) i managed to get usb, sd, e-mmc, clocks, gpio to work no ethernet and axp/power controller yet but the problem i have besides not having a proper dtb (the android image extracted one is not exactly usable because of different notation, device names, etc) is a serial console glitch in the form of not echoing the last character typed you always need to type +1 character to get the desired input so to login you type root\n<firstcharacter of the password> and then you get the password prompt so you type n+1 characters to get n characters sent the bug is not present in u-boot/loader just after the kernel started the uart to ttl dongle i use in the pc is good, i tested it with other boards and works as expected the board does not have a pin header for the connection just holes and i stucked the wires in the holes without soldering (very flimsy but still works in u-boot) also rx works ok does anybody know how to fix the serial connection ?