I made a F405 circuit board myself. After flashing the firmware, you can connect to the computer and flash the firmware normally (F405WING, MATEK). But after running for a period of time (about 5 minutes) an internal error pops up in the message box: internal errors 0X800 L: 240
I don’t know the reason for this error. So there is no solution for the time being. Would you like to ask if you have encountered this error? If you can help, thank you very much.
that is a watchdog reset. “4.1.0-dev” version is not latest. Please see if it reproduces with the latest firmware from https://firmware.ardupilot.org/Copter/latest/
and then reproduce with LOG_DISARMED=1 and you will get a log after the watchdog reset. Please make that log available
The DIY circuit board MPU6000-int pin is not properly connected to the PC4 pin of the STM32F405 microcontroller. I will re-make the circuit board and check whether the fault will occur. thank you for your help