TMS320F28335 - Using eCap as APWM-interrupt-source

#include "DSP28x_Project.h"    


void initPeriphals(void);
interrupt void ecap1_isr(void);


void main(void)
{


   InitSysCtrl();

// Disable CPU interrupts
   DINT;

// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.
   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).
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
   InitPieVectTable();

   initPeriphals();


   EALLOW;
   PieVectTable.ECAP1_INT = &ecap1_isr;
   EDIS; 



// Step 5. User specific code, enable interrupts:
// Enable CPU INT4 which is connected to ECAP1 INT:
   IER |= M_INT4;
   
   PieCtrlRegs.PIEIER4.bit.INTx1 = 1;
//

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


while(1)
{

}


}
void initPeriphals(void){
	



   ECap1Regs.ECEINT.all = 0x0000;             	// Disable all capture interrupts
   ECap1Regs.ECCLR.all = 0xFF;              	// Clear all CAP interrupt flags
   ECap1Regs.CTRPHS=0;
   ECap1Regs.ECCTL1.all = 0;         		 // Disable ECCTL1
   ECap1Regs.ECCTL2.all = 0;        		// Stop the counter and disable all
   
    // Configure peripheral registers         
   ECap1Regs.ECCTL2.bit.SYNCI_EN = 0;         	// Disable sync in
   ECap1Regs.ECCTL2.bit.SYNCO_SEL = 3;       	// Disable sync out
   ECap1Regs.ECCTL2.bit.CAP_APWM=1;		// Set APWM Mode
   ECap1Regs.ECEINT.bit.CTR_EQ_PRD=1;		// Enable int @ CTR==PRD
   ECap1Regs.CAP1=10000;			// Load period register
   ECap1Regs.ECCTL2.bit.TSCTRSTOP=1;		// Start the counter

}

interrupt void ecap1_isr(void)
{

	// Clear the interrupt flag

 	ECap1Regs.ECCLR.bit.INT = 1;	// Clear the ECAP1 interrupt flag
	ECap1Regs.ECCLR.all = 0xFF;		// Clear all ECAP interrupt flags
	
   // Acknowledge this interrupt to receive more interrupts from group 4
   PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;
 
}





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