Smells like a stack overflow. Could you enable the `CONFIG_ESP_SYSTEM_PANIC_GDBSTUB` via menuconfig. This will automatically launch GDB on a crash. Then from the point of crash, please navigate up the call stack and print out the value of `pxTCB->pxStack` to see if it's a sane value. This should be ...

Task functions must never return. Add a `vTaskDelete(NULL);` at the end of your task function.

See https://www.freertos.org/a00125.html for more details.

不能。一个 USB OTG 外设任何时候只能当 Host 或 Device。如需同事跑 Host 和 Device，芯片就要两个 USB OTG 外设。

@Ezra_Krause A couple of pointers

- Double check which GPIOs you are using and whether they are Input and/or output capable (see Datasheet for list of GPIOs and their capabilities/restrictions)
- Try running the self-test example without the transceiver to see if it's an issue with the GPIOs

指纹模块是属于哪个 USB Class （例如 CDC, HID, MSC 等等）？

可以用 Windows 设备管理器或 lsusb 查看设备是哪一个 class, 然后去调用 IDF 里对应的 Class 驱动。Class 驱动的示例在 https://github.com/espressif/esp-idf/tr ... s/usb/host.

@MicroController w.r.t to the "timer capture hardware", the ETM (Event Task Matrix) on some of the newer chips (e.g., ESP32-C6) could be able to do this. It's basically this big routing matrix that allows routing certain peripheral " event " signals from one peripheral (e.g., GPIO edge interrupt eve...

This should be the issue. You can't do that in C is an "int" type and not a character or string. Use string formatting plcaeholders such as "%d" instead.

Could decode the backtrace using "addr2line" to find the function/line numbers in the backtrace (idf.py monitor will automatically decode the backtrace for you).