Unable to connect to odrive(s)


I played around with my odrive 3.2 quite a bit before summer, and everything worked well. When picking my project up again now, I was unable to connect to the odrive through usb (using odrivetool). I tried reflashing it, but openocd failed:

openocd -f interface/stlink-v2.cfg -f target/stm32f4x.cfg -c init -c "reset halt" -c "flash write_image erase ODriveFirmware_v3.2.elf" -c "reset run" -c exit
GNU MCU Eclipse 64-bits Open On-Chip Debugger 0.10.0+dev-00487-gaf359c18 (2018-05-12-19:30)
Licensed under GNU GPL v2
For bug reports, read
WARNING: interface/stlink-v2.cfg is deprecated, please switch to interface/stlink.cfg
Info : auto-selecting first available session transport "hla_swd". To override use 'transport select <transport>'.
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 2000 kHz
adapter_nsrst_delay: 100
none separate
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : clock speed 1800 kHz
Info : STLINK v2 JTAG v17 API v2 SWIM v4 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 3.257143
Error: init mode failed (unable to connect to the target)
in procedure 'init'
in procedure 'ocd_bouncer'

I figured the board was toast, but luckily I had an unused odrive 3.5 (48v). After attaching it to the motors, encoders and battery, I try to connect using odrivetool, but it is unable to connect to the board. Windows doesn’t seem to recognize odrive as a USB device at all, so I figure there might not be any firmware on it. Try to flash using st-link, but get the same error as with 3.2.

I tried both boards with different usb-cables, which I also verified using other devices. I checked the cable connections to the st-link, and tried with new cables. I only tried the 3.2 on windows, but tried 3.5 on both windows and linux with similar result. The 3.2 had been used quite a lot, but the 3.5 had only been lying unused in the box for a couple some months.

Any idea what might be going on? Or any additional things I might try to troubleshoot?


That usually means that the wires between the ST-Link and the ODrive is not plugged in correctly, or the ODrive doesn’t have power.