Make CAN interface work properly (Not only CAN-to-USB !!!!)

makerbase-mks / MKS-SKIPR

MKS SKIPR is an all-in-one board launched by Makerbase for running Klipper. It integrates the RK3328 SOC running the Klipper host and the STM32F407VET6 MCU responsible for executing specific machine actions. It meets the use of most 3D printers.

GNU General Public License v3.0

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Make CAN interface work properly (Not only CAN-to-USB !!!!) #18

Open opiswahn opened 1 year ago

opiswahn commented 1 year ago

Currently, only CAN-to-USB communication is possible with the SKIPR board. This really sux, as the board has a CAN connector which is not functional as it seems. I could get my FLY-SB2040 to work in CAN-to-USB mode, but for that I would not have needed the SKIPR board, this would have worked with any other. You are giving away the selling point for your board. PLEASE DO SOMETHING.

G4Cab commented 1 year ago

if i read the schematics correctly, the can bus is on the stm32. so maybe we are never possible to use it with klipper the way we thought to use it. klipper has to access the can bus via the stm32, and that's not possible at this moment as i know.

G4Cab commented 1 year ago

https://klipper.discourse.group/t/mks-skipr-can-bus/5377

opiswahn commented 1 year ago

yea, i saw that... So from what i understand it is NOT possible to use CAN ATM correct? I Still don't understand why an extra USB-To-CAN board would be necessary, the SKIPR should do this.

Nakajima-Kuro commented 1 year ago

From what I see, BTT Octopus and Fly Gemini v2 also have Canbus on STM32 and it work fine with SB2040 (Can H and L on the CAN interface and no need for extra USB cable between the toolhead and the board) so this is really weird how it does not work with MKS Skipr

G4Cab commented 1 year ago

Just for Info, big process on discourse. https://klipper.discourse.group/t/mks-skipr-can-bus/5377/80

we realized that mks used the second can interface on the skipr. Kevin o'Connor had found a little problem on the stm32 First tests are promising, and i have a connection via the onboard can connector to my toolhead 😎

G4Cab commented 1 year ago