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The AD5940 cannot read the value in the register when compiling in ESPIDF environment

		
	
				

			

									
					    dgxy
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 4, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is experiencing issues reading the AD5940 register, which always returns 0. The solution involves ensuring the SPI rate is set to 8MHz or lower to meet the timing requirements. Additionally, the user should verify that VREF_1V82 and VREF_2V5 are outputting the correct voltages and that the EP pin is grounded. If the issue persists, the user should check the SPI communication timing and waveform using an oscilloscope or logic analyzer.
                        	    
    
                
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      When configuring the clock, I can't read the value when reading the AD5940 register, and it always returns to 0. What is the solution?
    
			
    
			
									    
    
			        
    Edit Notes
    
    				Is there any way to confirm that AD5940 is started normally and can communicate with ESP32 normally?
    
[edited by: dgxy at 9:36 AM (GMT -5) on 4 Jan 2025]
				
    
						
		                             
                        

    
    
                                            
                 AD5940 ESP32 SPI
                
                                                    
                 Sensors and MEMS
                
                                                    
                 Electrochemical Sensors
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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