BOOST5545ULP: Problem with DMA configuration

Hi,

I`m a student and I`m working on Boost5545ulp board. I will configure DMA to read by hardware interrupt an audio sample from codek by I2S to variable named AudioSampleLeft. Communication with codek works properly and I can read a sample in this way.

void aic3206_codec_read(Int16* left_input, Int16* right_input)
{
	volatile Int16 dummy;
	
	counter1 = 0;
	
	/* Read Digital audio inputs */
    while(!(I2S2_IR & RcvR) )
    {
    	counter1++; // Wait for receive interrupt
    }	
	
    *left_input = I2S2_W0_MSW_R;         // Read Most Significant Word of first channel
     dummy = I2S2_W0_LSW_R;              // Read Least Significant Word (ignore)
    *right_input = I2S2_W1_MSW_R;        // Read Most Significant Word of second channel
     dummy = I2S2_W1_LSW_R;              // Read Least Significant Word of second channel (ignore)
 	        
}

DMA should also generate interrupt after transmistion. Unfortunately DMA didn`t work. Both interrupt and sample transfer. So I have several questions:

1) How to set up correctly destination address to varieble?

2) Should the source address be set directly on I2S 2 Receive Left Data 1 Register or on DMA Start Byte Address from table from manual 140 side?

3) Does DMA clear the interrupt I2S flag after transfer or should I take this into account when I`ve configured DMA to autoreload mode?

To configuration I`m using header files from this threads. https://e2e.ti.com/support/processors-group/processors/f/processors-forum/231447/how-to-use-c553x-interrupts-without-csl?fbclid=IwAR3Yb-29HS8t-BCaMU6PSo38Nj5UpZBFth3X4TsSWzvlOQDMhgSFTJ2W0YI https://e2e.ti.com/support/processors-group/processors/f/processors-forum/231388/c553x-hardware-register-header?fbclid=IwAR2_9GJiSI970lD-2lVcJS5NgbEGC61LDH71NYP1IBZxrcjBqUQEA3k-J8Q

This is my whole code:

#include "stdio.h"
#include "BoosterPack5545_led.h"
#include "BoosterPack5545_switch.h"
#include "oled.h"
#include "usbstk5515.h"
#include "PLL.h"

#include "registers.h"
#include "interrupts.h"

Uint32 AudioSampleLeft;

/////////////////////////

interrupt void dma_isr(void);

void main(void){
    /* Initialize BSL */
    USBSTK5515_init( );

    /* Initialize PLL */
    pll_frequency_setup(120);

    /* DMA CONTROLLER 1 CH 0 I2S2 event and interrupt 1 double word*/
       IRQ_hook_func(dma_isr, ISR_DMA);// adding dma_isr function to vector (interrupts.h)
       PRCR &= ~(1<<DMA_RST);// setting DMA according to c5545 manual chapter 3.2.13 Initialization side 147
       PCGCR2 &= ~(1<<DMA1CG);
       DMAIFR= 0xFF;
       IFR0 &= ~(1<<9);
       DMAIER |= (1<<DMA1CH0IE);
       DMA1CH0TCR2 |= (1<<INTEN);
       DMA1CESR1= 0x2;
       DMA1CH0SSAU=0x0000;// DMA Controller 1 Memory Map I2S, manual side 140
       DMA1CH0SSAL=0x2A00;// maybe address of I2S 2 Receive Left Data 1 Register (0x2A29) ???
       DMA1CH0DSAU=(Uint16)&AudioSampleLeft;// address of AudioSampleLeft ???
       DMA1CH0DSAL=0x0;
       DMA1CH0TCR1=0x4;
       DMA1CH0TCR2 |= (1<<AUTORLD);
       DMA1CH0TCR2 |= (1<<(DSTAMODE+1));
       DMA1CH0TCR2 |= (1<<(SRAMODE+1));
       DMA1CH0TCR2 |= (1<<SYNCMODE);
       DMA1CH0TCR2 |= (1<<DMAEN);

    /* Initialise hardware interface and I2C for codec */
    aic3206_hardware_init();

    /* Initialise the AIC3206 codec */
    aic3206_init();
    BoosterPack5545_LEDs_init( );
    BoosterPack5545_SWITCHes_init( );

    /* Initialise the OLED LCD display */
    oled_init();
    SAR_init();
    oled_display_message("                   ", "                   ");

    IRQ_globalEnable();

	printf("\nSTART\n");

	while(1){
		aic3206_codec_write(AudioSampleLeft, AudioSampleLeft);	//aic3206_codec_write and aic3206_codec_read works properly but AudioSampleLeft is still NULL
	}

}

interrupt void dma_isr(void)// this interrupt function is never invoked
{
    printf("IT`S WORKING");
    DMAIFR= 0xFF;// clearing DMA interrupt flags
}

Thanks in advance for Your help.