descriptordma_ppi.h

Using the ADSP-BF561 Blackfin Processor as a TFT-LCD Controller

/******************************************************************************************************************/
/* Descriptor based DMA parameter customizations.  Modify these parameters to  									  */
/* suit your specific needs.																					  */
/******************************************************************************************************************/
void Init_DMA (volatile short *, volatile int *);

//#define DESCRIPT_ARRAY	//Uncomment for descriptor array mode -- steps through descriptors sequentially, as in an array
#define SMALL_DESCRIPT	//Uncomment for small descriptor model -- all descriptors confined to 64K page in memory
//#define LARGE_DESCRIPT	//Uncomment for small descriptor model -- max. flexibility in placing descriptors in memory

#define INTERRUPT_ENABLE		//Uncomment to enable interrupt.  Otherwise, no DMA interrupts.
#define TWO_D					//Uncomment for 2D DMA. Otherwise, 1D is used.
//#define INT_INNER_LOOP		//Uncomment for interrupting every row (applies to 2D only).  Otherwise, interrupt at end of whole buffer.
//#define DISCARD_FIFO			//Uncomment if discard FIFO.  Otherwise, retain.
//#define BITS_8				//Uncomment for 8-bit DMA.	
//#define BITS_16					//Uncomment for 16-bit DMA.
#define BITS_32				//Uncomment for 32-bit DMA.
//#define RX_DIRECTION			//Uncomment for rx direction.  Otherwise, tx direction.

/********************************************************************************************/
/* In descriptor based DMA, the descriptor size can vary from 1 entry to 9 entries.	 It is  */
/* up to the individual application to determine the descriptor size.  The following macros */
/* allow you to specify the size of descriptors, as well as, which DMA parameters you'd		*/
/* like to include as entries in your descriptor block.  If in each descriptor block, some  */
/* parameters remain the same throughout (static), then you do not need to write these 		*/
/* parameters in the descriptor entry.  													*/
/********************************************************************************************/
#define SAL					//Uncomment if you want to include this entry in your descriptors.  Applicable for all descriptor modes.
#define SAH					//Uncomment if you want to include this entry in your descriptors.	Applicable for all descriptor modes.		
#define NDPL					//Uncomment if using either small or large descriptor list mode.
//#define NDPH					//Uncomment only if using large descripter list mode.
#define ENABLE_DMA 1			//Uncomment to enable DMA.
/*******************************************************************************************/


#ifdef DESCRIPT_ARRAY 
	#define DESCRIPT_FLOW 0x4000
#else 
	#ifdef SMALL_DESCRIPT
		#define DESCRIPT_FLOW 0x6000
	#else 
		#ifdef LARGE_DESCRIPT
			#define DESCRIPT_FLOW 0x7000
		#endif
	#endif
#endif	
	
#ifdef INTERRUPT_ENABLE
	#ifdef INT_INNER_LOOP
		#ifdef DISCARD_FIFO	
			#ifdef TWO_D
				#ifdef RX_DIRECTION
					#define SET_CON 0x00F2	
				#else
					#define SET_CON 0x00F0
				#endif
			#else
				#ifdef RX_DIRECTION	
					#define SET_CON 0x00E2
				#else
					#define SET_CON 0x00E0	
				#endif	
			#endif
		#else
			#ifdef TWO_D
				#ifdef RX_DIRECTION	
					#define SET_CON 0x00D2
				#else
					#define SET_CON 0x00D0	
				#endif	
			#else
				#ifdef RX_DIRECTION	
					#define SET_CON 0x00C2
				#else
					#define SET_CON 0x00C0	
				#endif		
			#endif	
		#endif	
	#else
		#ifdef DISCARD_FIFO	
			#ifdef TWO_D
				#ifdef RX_DIRECTION
					#define SET_CON 0x00B2	
				#else
					#define SET_CON 0x00B0
				#endif
			#else
				#ifdef RX_DIRECTION	
					#define SET_CON 0x00A2
				#else
					#define SET_CON 0x00A0	
				#endif	
			#endif
		#else
			#ifdef TWO_D
				#ifdef RX_DIRECTION	
					#define SET_CON 0x0092
				#else
					#define SET_CON 0x0090	
				#endif	
			#else
				#ifdef RX_DIRECTION	
					#define SET_CON 0x0082
				#else
					#define SET_CON 0x0080	
				#endif		
			#endif	
		#endif
	#endif	
#else	
	#ifdef DISCARD_FIFO	
		#ifdef TWO_D
			#ifdef RX_DIRECTION
				#define SET_CON 0x0032	
			#else
				#define SET_CON 0x0030
			#endif
		#else
			#ifdef RX_DIRECTION	
				#define SET_CON 0x0022
			#else
				#define SET_CON 0x0020	
			#endif	
		#endif
	#else
		#ifdef TWO_D
			#ifdef RX_DIRECTION	
				#define SET_CON 0x0012
			#else
				#define SET_CON 0x0010	
			#endif	
		#else
			#ifdef RX_DIRECTION	
				#define SET_CON 0x0002
			#else
				#define SET_CON 0x0000	
			#endif		
		#endif	
	#endif
#endif		

#ifdef BITS_8
	#define DMA_CONFIG SET_CON|DESCRIPT_FLOW|ENABLE_DMA
#endif

#ifdef BITS_16 
	#define DMA_CONFIG SET_CON|0x0004|DESCRIPT_FLOW|ENABLE_DMA
#endif


#ifdef BITS_32 
	#define DMA_CONFIG SET_CON|0x0008|DESCRIPT_FLOW|ENABLE_DMA
#endif