/*********************************************************************************
*
* Embedded Studio (C) 2007                                   
*                                                                                
* File: ES_SDRAM_Test.c
* Desc: SDRAM self test function
* CPU: Analog Device ADSP-21369
*
**********************************************************************************/


/*******************************************************************************************
 * For 16-bit SDRAM, the DSP reads/writes twice to make 16 x 2 = 32 (1 word)
 *******************************************************************************************/
#define SDRAM_START  0x200000	// start address of SDRAM, MS0
#define SDRAM_SIZE	 0x200000	// size of SDRAM in 16-bit words.  (i.e. 2M x 32)

/*********************************************************************************
 * Function:  TEST_SDRAM
 *
 * Desc: This function tests each SDRAM location with different values
 *
 * Params: None
 *
 * Returns: boolean
 *
 * Notes:   
 *********************************************************************************/
bool TEST_SDRAM(void)
{
	int *pDst;
	int nPattern, nTemp;
	int i;
	
	// write all 0xFFFFFFFF
	nPattern = 0xFFFFFFFF;
	pDst = (UINT32 *)SDRAM_START;
	for(i = 0; i < SDRAM_SIZE; i++ )
	{
		*pDst++ = nPattern;
	}
	
	// verify all 0xFFFFFFFF
	pDst = (UINT32 *)SDRAM_START;
	for(i = 0; i < SDRAM_SIZE; i++ )
	{
		nTemp = *pDst++;
		if( nTemp != nPattern )
		{
			return false;
		}
	}
	
	// write all 0xAAAAAAAA 
	nPattern = 0xAAAAAAAA;
	pDst = (UINT32 *)SDRAM_START;
	for(i = 0; i < SDRAM_SIZE; i++ )
	{
		*pDst++ = nPattern;
	}
	
	// verify all 0xAAAAAAAA
	pDst = (UINT32 *)SDRAM_START;
	for(i = 0; i < SDRAM_SIZE; i++ )
	{
		nTemp = *pDst++;
		if( nTemp != nPattern )
		{
			return false;
		}
	}
		
	// write all 0x55555555
	nPattern = 0x55555555;
	pDst = (UINT32 *)SDRAM_START;
	for(i = 0; i < SDRAM_SIZE; i++ )
	{
		*pDst++ = nPattern;
	}
	
	// verify all 0x55555555
	pDst = (UINT32 *)SDRAM_START;
	for(i = 0; i < SDRAM_SIZE; i++ )
	{
		nTemp = *pDst++;
		if( nTemp != nPattern )
		{
			return false;
		}
	}
   
	// write incremental values to each SDRAM location
	pDst = (UINT32 *)SDRAM_START;
	for (i = 0; i < SDRAM_SIZE; i++ )
	{
		*pDst++ = i;
	}
	
	// verify incremental values
	pDst = (UINT32 *)SDRAM_START;
	for (i = 0; i < SDRAM_SIZE; i++ )
	{
		nTemp = *pDst++;
		if( nTemp != i )
		{
			return false;
		}
	}

	return true;
}