State machine not recognized by COM port after attempted firmware update

David_G

Hi Josh (and friends)!

Immediately after attempting to manually update a state machine from v22 to v23 last night, the state machine (which has gone through a few successful firmware updates + was working fine up until this moment) turned off and stopped being recognized when plugged into COM ports. I tried power cycling the state machine and connecting it to different ports on different computers, but nothing worked (whenever I plugged it in, I got no response from the PC and no LED illumination on the state machine itself). Another state machine plugged into the same PC was immediately recognized. If it helps to know, I was using Arduino 1.8.16 and I confirmed that I was updating a teensy 3.6 board on the appropriate COM port before uploading. I got the "Done uploading" message after the pop up window appeared.

Do you have any ideas re: what might have precipitated this issue and how I can reconnect to my state machine?

Thanks so much!

-David

Josh

Hello David,

Thanks for beta testing firmware v23!
Since you're compiling from the 'dev' folder in the repository, you'll need to configure some macros in the code to make it compile correctly for your target machine. The correct configuration for state machine r2 is:
MACHINE_TYPE 3
MACHINE_BUILD 0
SM_FEATURE_PROFILE 1

You should be on the develop branch of Bpod_Gen2, with all references to the master branch removed from the MATLAB path. Add the Bpod_Gen2 folder and /Functions/ with its subfolders. Then, from the MATLAB command prompt you can run LoadBpodFirmware(). This tool will load firmware to any Bpod device, and it can recognize Teensy in USB modes other than virtual serial.

If your Teensy really doesn't respond at all, open the enclosure by pressing down on the overhang above the ports and sliding it backwards through the front-facing panel. With the Teensy board plugged in to the PC, press the white button on the Teensy. It should then appear in the Arduino 'Ports' menu as a USB device.

If this still doesn't work, it may have been bricked somehow (yikes!). Please share the setup of your firmware macros and I'll try to replicate the issue here.

-Josh

David_G

Hi Josh,

Thanks so much for the speedy reply! I ended up having to open up the enclosure/press the button, then was able to push v22 from Arduino and use LoadFirmware() to push v23. Everything is working perfectly now, thanks for the help!

Best,

David