Sync using the two block continues read (ADC10 DTC)

Hi everyone,

I am trying to use the two block continues transfer (DTC) using the MPS430 microcontroller. I have created a very simple program that it seems to work fine, but I am trying to figure out what it is the best way to synchronize the writing to the each block and the reading from the main program. I am using a variable called readingBlockNum to synchronize between the called to the interrupt (when a block has been written)and the main loop, but I doubt that it is the best way to do it.

I would appreciate if anyone can suggest a better solution

volatile char readingBlockNum = 0;

void main()
{
	int i;

	WDTCTL = WDTPW + WDTHOLD;			// Stop WDT

	// Some clk configuration... 
	
	adc_Setup();
	
	  while(1)
	  {
			// Adding some dummy processing
		  for(i = 0;i<100;i++)
		  {
			  readingBlockNum = 1;
			  __delay_cycles(100);
		  }
		  for(i = 0;i<100;i++)
		  		  {
			  readingBlockNum = 2;
		  			  __delay_cycles(100);
		  		  }

			// Enable the ADC
		    ADC10CTL0 |= ENC + ADC10SC;		// Enable Conversion and conversion start
  	  }
}

void adc_Setup()
{
	ADC10CTL1 = ADC10SSEL_0 + CONSEQ_2;	// Repeat single channel and ADC10OSC (5MHz)CLK
	ADC10CTL0 = ADC10SHT_1 + MSC + ADC10ON + ADC10IE;
	ADC10AE0 |= 0x01;                         // P1.0 ADC option select
	ADC10DTC0 |= ADC10TB + ADC10CT;           // Continous two block transfers
	ADC10DTC1 = 0x64;                        // 100*2 conversions
	ADC10SA = (int)adc;
	ADC10CTL0 |= ENC + ADC10SC;               // Start sampling continously
	__enable_interrupt();                     // Enable interrupts
}

#pragma vector = ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
  if (ADC10DTC0 & ADC10B1)
  {
    if(readingBlockNum == 2)  // if the main is currently reading the 2 block, we stop to overwrite to the 2 block
    	ADC10CTL0 &= ~ENC;				
  }
  else
  {
      if(readingBlockNum == 1) // if the main is currently reading the 1 block, we stop to overwrite to the 1 block
    	  ADC10CTL0 &= ~ENC;			
  }
}