AVR Freaks

Hello,

> How do I intercept signal handler messages ???

> Is there an easy way for me to see more information like the signal number??

I answer some of my own questions. There is a way to register own own custom handler for the signal errors. The function signal() registers the callbacks. Here, I use the abort() function which raises signal number 6, i.e. SIGABRT with my compiler settings. Inside signal.h, there is a table which assigns different numbers according to the compiler setup.

I am making some progress with the call stack unwinding.  It needs -fno-omit-frame-pointer in the compiler miscellaneous other flags. That will go for another thread.

void testSignalAbort(void){
	abort();
}

#include <signal.h>
void mySignalHandler(int id){
		char buffer[160]; 

		if (isLcdInitialized){
			
			tft.clearScreen();
			tft.setCursor(0,0);
			tft.println("Signal Handler");
				
			snprintf(buffer, sizeof buffer, "id = %i", id );
			tft.println(buffer);
			
		}
		
		while (1) {
		}
	
}


void registerMySignalHandler(void){
	signal(SIGINT,mySignalHandler );
	signal(SIGILL,mySignalHandler );
	signal(SIGABRT,mySignalHandler );
	signal(SIGFPE,mySignalHandler );
	signal(SIGBUS,mySignalHandler );
	signal(SIGSEGV,mySignalHandler );   
	signal(SIGTERM,mySignalHandler );
	
	
}