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How can I config the sport and DMA.

		
	
				

			

									
					    CommunityWillDisplay
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 7, 2024 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  ADSP-bf702  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Now i have a code  without comment. This code are already configure the sport and DMA, and it can work, but i don't know why it need to set those parameter like. Is there some docement can explain it?
    

     // Init DMA0, for SPORT0 A
     *pREG_DMA0_CFG &= ~ENUM_DMA_CFG_EN;
     *pREG_DMA0_CFG = 0x001224; /* Setting the DMA */
     *pREG_DMA0_ADDRSTART = &adc_sport0_a_tx[0]; /* Setting the DMA Address */
     *pREG_DMA0_XCNT = SPORT_DMA_DEPTH;
     *pREG_DMA0_XMOD = SPORT_DMA_WIDTH;
    
			
    
			
									
		                                 
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                 Audio Signal Processors
                
                                                    
                 Datasheet/Specs
                
                                                    
                 adsp-bf702
                
                                                    
                 bf70x
                
                                                    
                 Blackfin Embedded Processors
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 8, 2024 6:03 AM
            
            
						
			            		
      
		
										+1
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi,
      


      The Code configures the DMA0 for ‘SPORT0A’ data operations. Each peripheral has dedicated DMA channel, and it perform transfers data between memory and a peripheral.
       
      1. The DMA_CFG register is responsible for setting up the DMA parameters and operation modes for data transfer or reception, specifying:
      

      - Transfer Word Size (MSIZE)
      

      - Transfer mode (one-shot, repeated, 1Dimension, or 2Dimension)
      

      - Interrupt and trigger generation settings etc.
      

      

      2. Xcount: Specifies the number of data bytes to be transferred.
      

      3. XMOD: Defines the stride for data transfer.
      

      4. ADDRSTART: Sets the starting address for DMA operation.
      


      Please refer Chapter 19 for detailed explanation about “Direct Memory Access (DMA)”. In the sub chapter “ADSP-BF70x DMA Register List”, you can find available register list which is used to program the DMA in different mode and configurations.
      

      https://www.analog.com/media/en/dsp-documentation/processor-manuals/BF70x_BlackfinProcessorHardwareReference.pdf
      


      Regards,
      Nandini.C
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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