Hi,
If I use the USB-C port I can power the board and also get a 1.5Mbps serial console port from the same connector. Now, I want to use a separate USB-C power supply, without connection to my laptop.
Can I get a serial port console using the 4-pin header on the E25 board?
P.S. Is there any overview of all the pins and connectors on the E25 board?
Best regards
/Joachim
Can you send a photo of your E25 board?
Please refer to the schematics:
https://dl.radxa.com/cm3p/e25/Radxa_CM3p_v1.1_E25_V1.3_SCH_20211201.pdf
Yes, you can put enable the dtbo for serial console on PIN 2&4.
Hi,
You can get a serial port console using uart3-m0,If you want to use uart3-m0 as console, modify /boot/uEnv.txt and modify the sixth line to
overlays=rk3568-fiq-debugger-uart3m0 rk3568-disable-npu
You can check out GPIO at :
https://wiki.radxa.com/Rock3/CM3p/e25/GPIO
Thank you @jack and @Alvin! I was initially referring to the 4-pin header on the board, the one close to the USB C-connector, but I guess using UART3 from u-boot as console works too.
However, I tried putting in the overlays= in my uEnv.txt file, but I on reboot I get this:
reading /dtbs/4.19.193-24-rockchip-g526c758e05e0/rockchip/rk3568-radxa-e25.dtb
144983 bytes read in 51 ms (2.7 MiB/s)
** Unable to read file /dtbs/4.19.193-24-rockchip-g526c758e05e0/rockchip/overlay/rk3568-fiq-debugger-uart3m0.dtbo **
** Unable to read file /dtbs/4.19.193-24-rockchip-g526c758e05e0/rockchip/overlay/rk3568-disable-npu.dtbo **
… and it seems my /boot/dtbs/4.19.193-24-rockchip-g526c758e05e0/rockchip/overlay/ directory doesn’t contain these files. I’m using radxa-e25-ubuntu-focal-server-arm64-20220801-0210-gpt.img.xz currently.
Check your uEnv.txt file is correct, rk3568-fiq-debugger-uart3m0 and rk3568-disable-npu need to be separated by spaces
Thanks, but I’m pretty sure I got it right, there just are no .dtbo files matching those names.
Here’s the overlay sub-directory for my image:
rock@radxa-e25:~$ ls -ld /boot/dtbs/$(uname -r)/rockchip/overlay/
drwxr-xr-x 2 root root 4096 Dec 31 2021 /boot/dtbs/4.19.193-24-rockchip-g526c758e05e0/rockchip/overlay/
rock@radxa-e25:~$ ls -la /boot/dtbs/$(uname -r)/rockchip/overlay/
total 140
drwxr-xr-x 2 root root 4096 Dec 31 2021 .
drwxr-xr-x 3 root root 16384 Dec 31 2021 ..
-rwxr-xr-x 1 root root 6107 Dec 12 2021 README.rockchip-overlays
-rwxr-xr-x 1 root root 515 Dec 12 2021 rk3568-can1-m0.dtbo
-rwxr-xr-x 1 root root 515 Dec 12 2021 rk3568-can1-m1.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-i2c2-m0.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-i2c3-m0.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-pwm1-m0.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-pwm1-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm12-m0.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm12-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm13-m0.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm13-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm14-m0.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm14-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm15-m0.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-pwm15-m1.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-pwm2-m0.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-pwm2-m1.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-pwm8-m0-fan.dtbo
-rwxr-xr-x 1 root root 382 Dec 12 2021 rk3568-pwm9-m0.dtbo
-rwxr-xr-x 1 root root 788 Dec 12 2021 rk3568-spi3-m1-cs0-spidev.dtbo
-rwxr-xr-x 1 root root 263 Dec 12 2021 rk3568-uart0.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-uart3-m0.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-uart3-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-uart5-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-uart7-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-uart8-m1.dtbo
-rwxr-xr-x 1 root root 384 Dec 12 2021 rk3568-uart9-m1.dtbo
-rwxr-xr-x 1 root root 491 Dec 12 2021 rk3568-w1-gpio.dtbo
-rwxr-xr-x 1 root root 1322 Dec 12 2021 rockchip-fixup.scr