Re: Pi 4 serial ports
- In reply to: John Rushford : "Re: Pi 4 serial ports"
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Date: Tue, 10 Jan 2023 04:49:10 UTC
On Jan 9, 2023, at 19:54, John Rushford <jjrushford@gmail.com> wrote: > This is all new to me and after some digging, I’m currently trying to put together a rk3328-uart2.dtso that I can compile to an overlay file so as to enable uart2 I'm confused. A rk3328 is a rockchip part not involved in/for RPi*'s (broadcom parts). Examples of .dtb files for products using the rk3328 parts are: /boot/efi/dtb/rockchip/rk3328-rock64.dtb /boot/efi/dtb/rockchip/rk3328-nanopi-r2s.dtb /boot/efi/dtb/rockchip/rk3328-rock-pi-e.dtb .dtbo files for a rk3328 are not usable for RPi*'s generally (ever?). Are you now using a rk3328 based part instead of a RPi* ? > John > >> On Jan 9, 2023, at 1:43 PM, John Rushford <jjrushford@gmail.com> wrote: >> >> Greetings, >> >> I’m running FreeBSD 13.1-RELEASE on a raspberry pi 4b rev 1.4. The pi 4 has 4 UART ports available but as far as I can tell, FreeBSD 13.1 only supports 1 of them. >> I would like to use one of the other UART ports to wire an adafruit GPS breakout too. I tried using the UART0 port but when I wire the GPS breakout to it, >> I run into boot issues with u-boot and console logging. I know that in other OS’s such as raspian or ubuntu, you are able to enable the additional UARTS in config.txt. >> Thinking that FreeBSD might support this I tried adding “dtoverlay=uartx” where x is 0 to 3 but I’m not seeing in any kernel logging that these ports were enabled and >> I don’t see any additional ttyu’s in the dev tree. >> >> So my question, does FreeBSD support these additional UARTS and if so, how do I enable them so that I may use one for the GPS breakout? >> >> Thanks >> John === Mark Millard marklmi at yahoo.com