Switching to DFU mode is no longer possible

[MarkusNiewoehner]

For reasons unknown to me I can no longer switch to DFU mode. The Levithan is installed in a working printer and no other USB devices are connected

Here is the dmesg output after pressing the boot and reset buttons as described in the instructions:

biqu@Trident250:~$ dmesg -HW [May27 12:31] usb 7-1: USB disconnect, device number 4 [ +0.000688] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.000228] gs_usb 7-1:1.0 can0: Couldn't shutdown device (err=-19) [ +0.000281] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.003354] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.868004] usb 7-1: new full-speed USB device number 5 using xhci-hcd [ +0.144559] usb 7-1: New USB device found, idVendor=1d50, idProduct=606f, bcdDevice= 0.00 [ +0.000008] usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ +0.000004] usb 7-1: Product: stm32f446xx [ +0.000003] usb 7-1: Manufacturer: Klipper [ +0.000004] usb 7-1: SerialNumber: 350033000A51313133353932 [ +0.001290] gs_usb 7-1:1.0: Configuring for 1 interfaces [ +0.000185] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.000323] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.146798] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.000802] IPv6: ADDRCONF(NETDEV_UP): can0: link is not ready [ +0.000010] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.000046] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready [ +0.000004] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing [ +0.005909] [dhd] CFG80211-ERROR) wl_cfg80211_netdev_notifier_call : wdev null. Do nothing

[JNP-1]

Do you have an STLink V2? You could use this to check whether the MCU is still accessible via the SWD interface.

[MarkusNiewoehner]

Yes, but I've never used it before. I'll see if I can try that one day. I was now able to flash the Levi with the current klipper via catapult.

[JNP-1]

Does the 3.3V LED light up when the board is powered?

[MarkusNiewoehner]

In 24V operation or 5V USB? I can check tomorrow.

[JNP-1]

In 24V operation.

[MarkusNiewoehner]

I'll report back tomorrow morning.

[MarkusNiewoehner]

Does the 3.3V LED light up when the board is powered?

yes, she does