C1139: Interrupt routine should not have any return value nor any parameter

[WARNING]

Description

Interrupt routines should not have any return value nor any parameter. In C++, member functions cannot be interrupt routines due to hidden THIS parameter. Another problem may be that a pragma TRAP_PROC is active where it should not be.

Example

  int interrupt myFct1(void){

    return 4;

  #pragma TRAP_PROC

  void myFct2(int param){ }

  class A{

  public:

    void myFctMbr(void);

};

  void interrupt A::myFctMbr(void){}

Tips

Remove all return value and all parameter (even hidden, e.g. 'this' pointer for C++):

  void interrupt myFct1(void){ }

  #pragma TRAP_PROC

  void myFct2(void){

  class A{

  public:

    void myFctMbr(void);

};

  void A::myFctMbr(void){ }

  void interrupt myInterFct(void){ }