TMS320FF2812 problems with Interrupt Init

Other Parts Discussed in Thread: TMS320F2812

Due to I´ve already spend a whole day with this little problem, I think it´s the best to ask you for some help...

It´s my first time with the C2000 DSPs but I´ve already worked with the MSP. I am using the EZdsp board with a TI TMS320F2812

I actually try  to program a simple Code with a external Interrupt to toggle an LED.  

So if i turn on 2,5V on the XINT1 Port, the LED on the PWM1 Port should toggle.

Instead I can´t get into the ISR. If I turn on the Voltage, nothing happens.

Maybe someone can help me? I´ve already found the DSP281x_examples_ccsv4 but it wasn´t helpful to solve my problem or just didn´t  understand it how to use.

Thank you very much in advance!

Benjamin

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// Prototype statements for functions found within this file.
interrupt void XINT1_ISR(void);

// Global data variables used for this exam
 void  Gpio_select(void);	


void main(void)
{
// Step 1. Initialize System Control:
   InitSysCtrl();

// For this example use the following configuration:
   Gpio_select();	
   
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
   DINT;

// Initialize PIE control registers to their default state.
   InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
   IER = 0x0000;
   IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
   InitPieVectTable();

// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.

        EALLOW;	                                                  // Allow access to EALLOW protected registers
       PieVectTable.XINT1 = &XINT1_ISR;           // For signal

	XIntruptRegs.XINT1CR.all = 0x0005;		//Polarity low-to-high// Enable Interrupt

       EDIS;                                                                      // Disable access to EALLOW protected registers

// Enable interrupts required         
        EnableInterrupts();


// Wait for all Group 1 interrupts to be serviced
	 while(PieCtrlRegs.PIEIFR1.all != 0x0000 ){}
	 	 
// Step 6. IDLE loop. Just sit and loop forever (optional):
         for(;;);
}


//------------------------------------------------------------------------------------------------

interrupt void xint1_isr(void)
{
	Uint16 i;
	// Set interrupt priority:
	PieCtrlRegs.PIEIER1.all = M_INT4;
	IER |= M_INT2;                  // Set "global" priority


      // Enable global Interrupts and higher priority real-time debug
      EINT;   // Enable Global interrupt INTM
      ERTM;   // Enable Global realtime interrupt DBGM

     for (i = 0; i < 4000; i++) {}	
    
      GpioDataRegs.GPASET.all  =0xFFFF;			//^=

 
        asm("      NOP");

   // Acknowledge interrupt to receive more interrupts from PIE group 2
        PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;

}

void Gpio_select(void)
{

    Uint16 var1= 0x0000;		// sets the Input qualifier values
   
    EALLOW;
	 
    GpioMuxRegs.GPAMUX.all=0x0000;
    GpioMuxRegs.GPEMUX.all=0x0000;   

										
    GpioMuxRegs.GPADIR.all=0xFFFF;		// GPIO PORTs  as output
    GpioMuxRegs.GPEDIR.all=0x0000;    	// GPIO DIR select GPIOs as output 

    GpioMuxRegs.GPAQUAL.all=var1;  		// Set GPIO input qualifier values
    GpioMuxRegs.GPEQUAL.all=0xFFFF; 

 
    EDIS;
     
}