MMB CAN V1.0

[McCosch]

Hello,
I have a situation that has unfortunately been bothering me for a while. I've repeatedly started it and put it aside because I can't find a solution. Perhaps you can help me.
Now I have the following errors, as shown in the pictures. The DFU is detected, but I can't flash it.

[mvdveer]

From the above it looks like it has flashed "File download successful" The last error is common an can be ignored "Error during download get status"

The device will not show up as a USB device any longer as it is now a CAN device with catapult on it.

Make sure your can network is up and running. 

sudo nano /etc/network/interfaces.d/can0

enter this into the file:

allow-hotplug can0
iface can0 can static
  bitrate 1000000
  up ifconfig $IFACE txqueuelen 1024

Save, and shutdown everything.

Restart the pi, query the can network:

ip a

and make sure you see the can interface:

can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1024
link/can  promiscuity 0 minmtu 0 maxmtu 0
can state ERROR-ACTIVE restart-ms 0
        bitrate 1000000 sample-point 0.750
        tq 62 prop-seg 5 phase-seg1 6 phase-seg2 4 sjw 1
        gs_usb: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..1024 brp-inc 1
        clock 48000000
        re-started bus-errors arbit-lost error-warn error-pass bus-off
        0          0          0          0          0          0         numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
RX: bytes  packets  errors  dropped overrun mcast
11412      1551     0       0       0       0
TX: bytes  packets  errors  dropped carrier collsns
3568       641      0       0       0       0then get the device UUID:

 

then get your device UUID:

python3 ~/katapult/scripts/flashtool.py -i can0 -q

write this down and continue to flash klipper to it - see Esoterical Canbus guide:

[McCosch]

Vielen Dank für Ihre Bemühungen... jetzt mache ich eine Pause... so weit bin ich gekommen

[McCosch]

[mvdveer]

Did you use the superuser (sudo) to create the file?

sudo nano /etc/network/interfaces.d/can0

After entering this in the empty file

allow-hotplug can0
iface can0 can static
  bitrate 1000000
  up ifconfig $IFACE txqueuelen 1024

press Ctrl X and Y to save with the default name that appears. Your can network won't show up until this is created.

[McCosch]

Apparently I'm too stupid to save, but something's not right. When I press "Enter," I get an error message.
I found the path in Raspberry, but not "/interfaces.d/can0."

[Mac_A_Million96]

When did you last create the Raspberry Pi OS Image ? I tried to Re-Install Klipper on my printer a short while ago and ran into this exact issue "Error Writing: No Such File or Directory" and it turned out that the latest OS updates has made changes and trying to create this file does not work, even while making it manually, My solution was to go to the Raspberry Pi website, look for the "Archive" of images and download an older version, I think any from 2024-10 and older should work,

I found that even creating the file manually in the new OS does not work and the "can0" network stays "Down"

[Mac_A_Million96]

Also the "Flash" looks like it worked, but you might have to power cycle the CAN board to get it back out of DFU mode once the Flash is complete, though you'd need to get the CAN network working first

[McCosch]

 

Hello,

I just reinstalled everything. The real problem is that when configuring the MMB CAN, I only have the serial number of the board, and I keep getting the message in the printer.cfg that the PIN cannot be found, or I can't configure anything. As I described above.

 

[Mac_A_Million96]

Hi,

Could you share an image of the Error that you are having.

[McCosch]

of mainsail and clipper ?

[Mac_A_Million96]

of the message that says the "PIN cannot be found"

[McCosch]

this may take a little while

[McCosch]

So now I have the message but I have to say that I don't have an entry in the [mcu MMB] yet.

[Mac_A_Million96]

Would you be able to share an image of where "ez_driver1" is in your printer.cfg file

[McCosch]

config-20250322-184826.zip

[McCosch]

 

mvdveer:
Now it worked, I was able to create the folder.

sudo mkdir /etc/network/interfaces.d

sudo nano /etc/network/interfaces.d/can0

With the first command, I was able to create the folder interfaces.de, and then I was able to run can0 according to its specifications. I checked the RPi, and it's there...

 

[Mac_A_Million96]

If you run the "ip a" command you should get a result that looks like the following

3: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 128
    link/can
 

[McCosch]

[McCosch]

Thanks for your efforts. I'll stop for today. I'll rethink everything tomorrow.

[Mac_A_Million96]

 

Thats fine, ill have a look at the "pin not valid" issue you were having in the meantime

 

[McCosch]

Hello,
After a lot of trying, reading, and testing, I've finally managed to connect my BTT MMB CAN and even control it, albeit only partially. The sensors are displayed and the gear stepper can be moved. Now I just need to calibrate everything, and I'm still looking for the corresponding commands... In any case, I'm glad I managed to get a connection at all.