Configure CAN BeagleBone AI, Kernel v4.19

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1

Hi all, I have been working on updating some of my device tree files to the newer image found at:

https://rcn-ee.net/rootfs/bb.org/testing/2020-09-07/buster-iot/am57xx-debian-10.5-iot-armhf-2020-09-07-4gb.img.xz

using the device tree files at:

https://github.com/beagleboard/BeagleBoard-DeviceTrees/tree/v4.19.x-ti-overlays/src/arm/overlays

I would like to use pins P9.26 and P9.24 for can bus communication. In the previous version of the image (the latest IOT image found at https://beagleboard.org/latest-images), I was able to configure them using a modified version of a sample dts. Looking at the 4.19.x-ti-overlays branch of the device tree overlay repo, I found the BONE-CAN1.dts file, which seemed to do almost exactly the same thing. I built the dtbo and copied it to /boot/dtbs. This is my uEnv.txt:

uname_r=4.19.94-ti-r50
#uuid=
#dtb=

###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1

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CAN interfaces are down by default. If you type “ifconfig -a” you should see them…

A quarta-feira, 14 de outubro de 2020 à(s) 11:45:01 UTC+1, Douglas Conover escreveu:

3

Thanks, that did the trick. “ifconfig -a” showed the can0 interface and the following two lines brought it up:

sudo ip link set can0 type can bitrate 125000

sudo ip link set up can0