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Simple audio in-out code for the ADSP-BF706 EZ-KIT



		

			

									
						PatrickG
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Dec 15, 2016 
				
			
			
		


				
		

		    		    
		    
		    	
			
I have an audio in-out program in C for the ADSP-BF706 EZ-KIT mini, about 80 lines in length. It's simple and very easy to understand. It's also completely self-contained - it doesn't use any of the header files that the "TalkThrough_BF706Mini.c" program uses (supplied with the kit). It includes a basic TWI driver, SPORT0 set up and configuration routine for the on board codec (ADAU1761). With some simple modifications it can be used for filtering, both FIR and IIR. The file is attached. All welcome to use free.

 
PatrickG

								


				
							BF706_audio_inout.pdf
					
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	














	

	

					



			








	
	
	
	



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                on Aug 23, 2017 1:11 PM
            
            
					
    
	
    

		
		
    
					
    Hi Patrick,
    
 
    it seems your program (and my version of it) does not run in
    release mode. I guess the delay loops in write_TWI are getting 
    too short or are removed completely by the compiler in release mode.
    The attached version Audio_Filter_v3 has new delay loops.
    Debug mode could also explain the poor results for the FIR filters in C.
    
 
    Regards
    
 
    Uwe
    
			
    

		
		
		
				Audio_Filter_v3.zip
			
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
						
				
				
		
		
    
			
		
    
	
    

    

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                on Aug 23, 2017 1:11 PM
            
            
					
    
	
    

		
		
    
					
    Hi Patrick,
    
 
    it seems your program (and my version of it) does not run in
    release mode. I guess the delay loops in write_TWI are getting 
    too short or are removed completely by the compiler in release mode.
    The attached version Audio_Filter_v3 has new delay loops.
    Debug mode could also explain the poor results for the FIR filters in C.
    
 
    Regards
    
 
    Uwe
    
			
    

		
		
		
				Audio_Filter_v3.zip
			
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
						
				
				
		
		
    
			
		
    
	
    

    

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