Why does my XIAO RP2040 get a very strange C++ error when using the code for HardwareTest with Round Display?
A: This may be caused by you not selecting the appropriate compile option for the XIAO RP2040. Please refer to the diagram below to set and re-upload the program.
![](https://files.seeedstudio.com/wiki/round_display_for_xiao/100.png)