ISR declaration syntax

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Bruce Varley

• April 13, 2021 05:27

Hello,  In the help documentation, the following syntax is shown for declaring an ISR forARM:

void f () __attribute__ ((interrupt ("IRQ")))

When I use this I get the following build error: "Attributes should be specified before the declarator in a function definition". 

My code is as follows:

void T0ISR() __attribute__ ((interrupt ("IRQ")))

{

long int Regval  ;

Regval = T0IR ;

etc, etc.....

 

Can anyone advise what the correct syntax is? Thanks

0

• 

  Jon Elliott

  • April 13, 2021 08:26

  You should put the attribute in a function declaration rather than the definition, for example:

  void T0ISR() __attribute__ ((interrupt ("IRQ")));
  
  void T0ISR()
  {
  ...
  }

   

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