#include <cc2511_map.h>
#include <cc2511_types.h>
#include <dma.h>
#include <hal.h>

// Just to make it easier:
// DMA14_CONFIG is a structure which has four DMA_CONFIG
// DMA_CONFIG is the hardware configuration registers
// In wixel, the first channel was used for radio so lets keep it that way 
// for now. If we encounter problems later on, will change that accordingly
// _2, _3 and _4 were unassigned. For ADXL377, which is a 3 axes device,
// it will be assigned to x, y and z
// And finally lets use DMA to receive packets by radio
//
DMA14_CONFIG XDATA dmaConfig;
DMA_CONFIG XDATA radioRxConfig;



void dmaInit(void)
{
  DMA1CFG = (uint16)&dmaConfig;	
}

/*******************************************************************************
* @fn           initDma
*
* @brief        This function clears all interrupt flags and disarms all DMA channels 1 to 4.
* 		This function is written specifically for a different application
*
* @parm         none
*
* @return       void
*
* DMA is used by the following functions 
* 			buffers to radio
* 			port 0_0 ADC
* 			port 0_1 ADC
* 			port 0_2 ADC
* All DMA related registers should be initialized for the above four functions
* 			
*/

void initDma(void)
{
  
  					// ARM channels 0, 1 and 2
  DMAARM &= (DMA_CHANNEL_0 | DMA_CHANNEL_1 | DMA_CHANNEL_2);  
  DMAARM |= (DMA_CHANNEL_0 | DMA_CHANNEL_1 | DMA_CHANNEL_2);  
  DMAREQ &= (DMA_CHANNEL_0 | DMA_CHANNEL_1 | DMA_CHANNEL_2);  
  DMAREQ |= (DMA_CHANNEL_0 | DMA_CHANNEL_1 | DMA_CHANNEL_2);  
  DMAIE = 1;				// Enable DMA Interrupt

  DMA0CFG = (uint16)&radioRxConfig;	//Initialize the structure to Rx Pkts
  DMA1CFG = (uint16)&dmaConfig;		//Initialize all 4 channels as done in
  					// original code
  // Clearing the interrupt flag of the DMA and enabling DMA interrupt.
  // INT_SETFLAG(INUM_DMA, INT_CLR);
  // INT_ENABLE(INUM_DMA, INT_ON);

  // DMA_SET_ADDR_DESC1234(&dmaConfig); Not required to do this as 
  // with the current compiler, the above statements will take care of
  // high and low bytes
}