mb6hc USB issues

curtisb1986

Hi all,

I'm having a problem with my MB6HC and I'm pretty desperate to figure out what's going on. After letting a project sit on the shelf for a while, I was forced to finish it for a variety of reasons. I did this a couple of times, and each time made sure that the USB power was applied long enough to complete the erasure of the firmware.

When I attempted to connect my mb6hc via usb (no power supply), at first I received a normal, steady diag light, and I had a usb device that windows (10) didn't recognize. When I attempted to install the driver, I was only able to browse for the files downloaded from duet by clicking "update driver." That didn't work, windows said "the best driver for this is already installed" or something to that effect. In an attempt to find a solution, I foolishly chose the "uninstall device" option from the device manager. After that I was unable to see the board again, no matter what I tried. The diag light still was normal, steadily blinking at this point.

After reading the documentation and attempting reboots, USB resets, etc, I arrived at the conclusion that I would have to erase the board's firmware. I put a jumper over the erase pins, applied usb power for a few seconds, and then tried again.

Now my diag light is not lighting at all, but the rest of the lights are normal.

I attempted to look at the contents of the SD card, but it was blank.

I'm at a loss at this point, the erase pins seem to have done something even worse than my human error, which is saying a lot lol.

Before anyone asks, I'm a cheapo dummy and bought a clone, but I promise to buy genuine from now on

Phaedrux

You don't typically need drivers with modern windows.

Just open the Bossa software and see if a com port shows up. Follow the directions for firmware flashing here.

Also, too late now, but the boards come with firmware on them (at least genuine ones do), so you don't need to flash them before use.

https://docs.duet3d.com/en/User_manual/RepRapFirmware/Updating_firmware#fallback-procedure-2

You'll need a specific version of Bossa for the 6HC. It's linked on that page.

curtisb1986

@Phaedrux

Thanks for the quick reply!

I switched USB cables, and got a samba port (COM7) and tried to use bossa to connect, but the only COM port it lets me choose is COM3 (intel active management technology)

So that's where I'm stuck now.

Still no diag light tho

Phaedrux

Did you get the version of Bossa from the firmware update page? You may need to click refresh in bossa.

curtisb1986

@Phaedrux
I tried both of the versions listed here: https://docs.duet3d.com/User_manual/RepRapFirmware/Updating_firmware

I seem to have gotten it to work from the command line. It says it's writing the firmware as I type this now

Phaedrux

Unfortunately with a clone anything is possible, so the behaviour may not match what I'd normally expect.

Once it takes a firmware you should be able to use YAT to communicate with it and use the online config tool to generate a config file set and get the DWC files as well. (check box to include them at the end of the config tool)

https://configtool.reprapfirmware.org/Start

curtisb1986

Thanks @Phaedrux ! I got it back up n running