DebugMon interrupt

biafra — Mon, 26 Nov 2018 12:41:25 GMT

Hi everyone

I'm using MCUXpresso 10.2.1 and a custom board based on MK66F2N0.

To catch a bug about writing on a variable, I'd want to use the debug monitor interrupt. I've configured the DWT peripheral to set the debug monitor interrupt, but I have two problems:

Every time I write the variable, the program stops if there is the debug probe connected (P&E multilink universal), whether if it's running a debug session or a release session
The interrupt is never executed (both with the debug probe connected or not)

This the code I use:

unsigned long DebugVar = 0;
unsigned long DebugHandler = 0;

void main( void )
{
unsigned long DebugCnt = 0;

...

   //init debugmon
   CoreDebug->DEMCR = CoreDebug_DEMCR_TRCENA_Msk | CoreDebug_DEMCR_MON_EN_Msk;
   DWT->COMP0 = ( uint32_t )&DebugVar;
   DWT->MASK0 = 0;
   DWT->FUNCTION0 = ( 1 << 11 ) | ( 1 << 2 ) | ( 1 << 0 );
   NVIC_SetPriority( DebugMonitor_IRQn, 7 );
   EnableIRQ( DebugMonitor_IRQn );

   while( 1 )
   {
      if( DebugCnt++ >= 100 ) //every 10 s
      {
         DebugCnt = 0;
         DebugVar++; //write var
      }

...

      if( DebugHandler )
      {
         //debug
         PRINTF( "Debug monitor handler executed\n" );
         DebugHandler = 0;
      }

vTaskDelay( 10 ); //systick = 10 ms: delay 100 ms

}
}

void DebugMon_Handler( void )
{
if( DWT->FUNCTION0 & DWT_FUNCTION_MATCHED_Msk )
DebugHandler = 1;
}

Is there any error? Why is the interrupt never executed? Is it possible to avoid stopping the execution during the debug session?

Many thanks

Biafra

Re: DebugMon interrupt

lpcxpresso_supp — Fri, 30 Nov 2018 10:32:04 GMT

See response in your other thread - https://community.nxp.com/thread/489761#comment-1086499

topic Re: DebugMon interrupt in MCUXpresso IDE

DebugMon interrupt

Re: DebugMon interrupt