Sending interrupt using the DSK_AUDIO4 Daughtercard

I am trying to save the audio data from 4 microphone inputs connected to the DSK_AUDIO4 daughtercard so that I can process it for sound source localization. I understand that the audio data from the 4 microphones are sent to the McBSP. How do I enable interrupts using the daughtercard such that I can save the audio data to buffers? 

For instance in the loop_buf project that came with the Digital Signal Processing texbook by R Chassang and D Reay, they had a function called comm_intr() that sets up the interrupts for the AIC23 Codec. 

                                             
interrupt void comm_intr()						 	//for communication/init using interrupt
{
	poll=0;                        	//0 since not polling
   IRQ_globalDisable();           	//disable interrupts
	c6713_dsk_init(); 					//init DSP and codec
	CODECEventId=MCBSP_getXmtEventId(DSK6713_AIC23_codecdatahandle);//McBSP1 Xmit

#ifndef using_bios						//do not need to point to vector table
  	IRQ_setVecs(vectors);     			//point to the IRQ vector table
#endif										//since interrupt vector handles this

  	IRQ_map(CODECEventId, 11);			//map McBSP1 Xmit to INT11
  	IRQ_reset(CODECEventId);    		//reset codec INT 11
   IRQ_globalEnable();       			//globally enable interrupts
  	IRQ_nmiEnable();          			//enable NMI interrupt
   IRQ_enable(CODECEventId);			//enable CODEC eventXmit INT11

	output_sample(0);        			//start McBSP interrupt outputting a sample
}

How do I do something similar for the PCM3794 codec on the DSK_AUDIO4 daughtercard. In particular I'm not sure what

CODECEventId=MCBSP_getXmtEventId(DSK6713_AIC23_codecdatahandle);  is doing.

Thanks for the help.