Compiler/TM4C123GH6PGE: Interrupt Routine Jump.

Tool/software: TI C/C++ Compiler

Hello.

There are two different states for interrupt ISR jump.

Case1 (No jump) ,   Case2 (jump OK) , Why is it different ?

Is not it all the same in two cases ?

What's the difference?

thanks.

[ Case1 ]

void
PM0IntHandler(void)
{
 	ROM_IntMasterDisable();
	GPIOIntClear(GPIO_PORTM_BASE, GPIO_PIN_0);
	UARTprintf("GPIOM Falling_Edge Interrupt\n");
	ROM_IntMasterEnable();
	
}


int
main(void)
{
	
    // Enable GPIOG  for the on-board LED. 
    // Enable GPIOM for the on-board Up Button. 
		
  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOM);

   // GPIOG Port Pin2, Ouput Seting 
  GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, GPIO_PIN_2 );
			
   // UART Func Call   		
	ConfigureUART();

   // No define System Clock 
	UARTprintf("CLOLK = %d\n",SysCtlClockGet());
	
   // GPIO PM0 Pin Input Set 	
	GPIOPinTypeGPIOInput(GPIO_PORTM_BASE, GPIO_PIN_0);

	// GPIO Pad Config Set 
	GPIOPadConfigSet(GPIO_PORTM_BASE, GPIO_PIN_3|GPIO_PIN_2|GPIO_PIN_1|GPIO_PIN_0	, 
	GPIO_STRENGTH_8MA,GPIO_PIN_TYPE_STD_WPU);
	
	// GPIOM interrupt Type Seting ( GPIO_LOW_LEVEL  or  GPIO_FALLING_EDGE )
	GPIOIntTypeSet(GPIO_PORTM_BASE, GPIO_PIN_0, GPIO_FALLING_EDGE); 
	
	// GPIOM Pin0, Interrupt handler Reigster
  //GPIOIntRegister(GPIO_PORTM_BASE, PM0IntHandler);
	
	
	// GPIOM Interrupt Enabel
	GPIOIntEnable(GPIO_PORTM_BASE, GPIO_INT_PIN_0);  
	
	IntMasterEnable();

    while(1)
    {

	
  // Turn on the LED.

	GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_2, 0x04);
	
	UARTprintf("LED On \n");
	
	SysCtlDelay((SysCtlClockGet()/3)*0.1);  //100ms Delay, (High)

	
	// Turn off the LED.
	 
	GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_2, ~(0x04));
	UARTprintf("LED Off\n");
	SysCtlDelay((SysCtlClockGet()/3)*0.05);  //50ms Delay, (Low)
	
		UARTprintf(" \n");
		
		
    }
}

 startup_rvmdk.S for  Keil 

       EXTERN  PM0IntHandler

; The vector table

        DCD     PM0IntHandler           ; GPIO Port M

       .

       .

       .

 [ Case 2]  

    // GPIOM Pin0, Interrupt handler Reigster
   GPIOIntRegister(GPIO_PORTM_BASE, PM0IntHandler);

    startup_rvmdk.S for  Keil 

   ;  EXTERN  PM0IntHandler

   ; The vector table

        DCD     IntDefaultHandler           ; GPIO Port M

         .

         .

         .