How to setup the internal CAN interface?

[rclarke250]

config says CAN bus (on PB12/PB13) and that is not a choice in make menuconfig. So how does one setup the internal CAN interface with a CB1 mounted on the board?

[emersonsc]

Looks like there is a pull request but Kevin being Kevin has an issue with something stupid and its being held up.

[looxonline]

For now, you'll need to use the BTT klipper branch where it is supported until Kev upstreams it. Klipper3d/klipper#5981

[JamesH1978]

The issue is that the files submitted in the PR Klipper3d/klipper#5981 , contain sections for a [tmc2240] module which does not exist in mainline klipper. Until btt submits this modile to add the functionality the PR will probably stay stale.

Thanks
James

[rclarke250]

The latest Klipper3d update allowed me to get CAN functioning. A setup guide in the manual would be helpful for those not familiar with using USB to CAN bridge mode.

[hauserkristof]

Hi @rclarke250 !

Can you help me with enabling the CAN Bus on the device? I'm struggling with it a bit.

Thank you in advance,
Kristóf

[rclarke250]

Hi @rclarke250 !

Can you help me with enabling the CAN Bus on the device? I'm struggling with it a bit.

Thank you in advance, Kristóf

Sure what do you need help with?

[yourbuddydinec]

Hi @rclarke250 !
Can you help me with enabling the CAN Bus on the device? I'm struggling with it a bit.
Thank you in advance, Kristóf

Sure what do you need help with?

I was curious what you chose for the pins on katapult/Canboot. It looks like on the E3EZ it should be the PC12/PB13 but the only choice in Canboot is PD12/PD13

[rclarke250]

I didn't use Canboot. I just used Klipper make menuconfig...set the STM device to USB bridge mode, and set the pins for can, make and copied to a microsd after changing klipper.bin to firmware.bin and booting the machine.

[Deapper]

I didn't use Canboot. I just used Klipper make menuconfig...set the STM device to USB bridge mode, and set the pins for can, make and copied to a microsd after changing klipper.bin to firmware.bin and booting the machine.

Do you use an EBB tool head? I setup the MCU for canbus but could not see the ebb42 I have. I could see the Manta no problem. And seemed quite easy to setup

I followed this guide https://www.youtube.com/watch?v=EA-oBfenxAE&t=160s

[rclarke250]

Yes, I actually have 2 EZ boards, one on an Ender 3 pro with CAN to an EBB42, and another in an Artist-D pro running 2 EBB42 in Idex with BTT H2's.

…

On Sun, Aug 13, 2023, 7:05 AM Decapper ***@***.***> wrote: I didn't use Canboot. I just used Klipper make menuconfig...set the STM device to USB bridge mode, and set the pins for can, make and copied to a microsd after changing klipper.bin to firmware.bin and booting the machine. Do you use an EBB tool head? I setup the MCU for canbus but could not see the ebb42 I have. I followed this guide https://www.youtube.com/watch?v=EA-oBfenxAE&t=160s — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AORZE7EVRQRU53WL5H2GICLXVCYJLANCNFSM6AAAAAAT5HJGA4> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[Deapper]

So do you use the following under make menuconfig?
USB bridge - CANBUS - PB12 PB13?
Both Manta and EBB42 usb to (CAN bus (on PB0/PB1)?

Also what baudrate do you use? 1000000?

And do you have the 120omh pin shorted on both Manta and EBB42?

thanks

[rclarke250]

The Manta yes, USB-Canbus-PB12,PB13.
The EBB Canbus PB0,PB1
I used Baud rate 500000. Doesn't seem to be an issue.
And yes, 120 Ohm jumper on each.
cable has to be twisted, with High to High, Low to Low. Doesn't need to have a lot of twist, I also twisted my Power cables with it, and is working okay.

[Deapper]

Thank you.