CodePudding user response:

You have a header file? And this code you write is not very good void exzdl (void) interrupt2 interrupt2 is doing this? Haven't seen such function, and inside I you above is defined as a global variable? Here why can directly use, ask things put all of the code, unless you are sure no code has nothing to do with this mistake, it's you throw this, and look at the error no header file wrong