D:\teensy编写\PCBtest-v5.1\3.20\3.20.ino:120:5: error: 'resetFunc' was not declared in this scope

This error message indicates that the function "resetFunc" used in line 120 of the code was not declared or defined in the current scope.

To resolve this error, you need to make sure that the function "resetFunc" is properly declared or defined in your code. Check if there are any missing header files or library dependencies that might be causing the issue. You may also want to check if there are any syntax errors or typos in the function name or its parameters.