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AD9910 controlled by MBED LPC1768 via SPI



		

			

									
					    VinMA
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 29, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I am a student with no experience in programming, and my project consists in controlling this DDS (AD9910) with the MBED model specified above. I am trying to send anything from de microcontroler to the DDS but I haven't have success. The code I have tested is attached in this discussion and I had tried lots of modifications on the numbers - including the frequency and format of SPI - but I have had no response on the DDS. Despite of that, I have successful communicated the MBED with a digital potentiometer with a similar code ( I will attach both codes). Can anyone help? I'm kind of lost. Thanks.
    
								
    

				
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      •  Analog Employees  
      
            
			                            
                        
                on Feb 4, 2018 10:23 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      
 
      Are you using the AD9910 evaluation board or you have a custom board? In case you have a custom board, can you share its schematic?
      
 
      To verify that the communication to the part is successfully established, you can try to enable or disable bit 22 of CFR2 and check the output on SYNC_CLK (pin 55).
      
 
      Best regards,
      
 
      Mark
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on Feb 4, 2018 10:23 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      
 
      Are you using the AD9910 evaluation board or you have a custom board? In case you have a custom board, can you share its schematic?
      
 
      To verify that the communication to the part is successfully established, you can try to enable or disable bit 22 of CFR2 and check the output on SYNC_CLK (pin 55).
      
 
      Best regards,
      
 
      Mark
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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