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AD9371 Recommended for New Designs
The AD9371 is a highly integrated, wideband RF transceiver offering dual channel transmitters and receivers, integrated synthesizers, and digital signal...
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RX spectrum analysis using iio oscilloscope in custom board (Zynq ultrascale+MPSoC , AD9371)



		

			

									
					    sumala
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 15, 2023 
				
			
			
		
    

				
		
    
		    		    
		    
		    		            		        
    Category: Software
    
    		        		        		    		    	
			
    Hi,
    

    We are having custom board with Zynq ultrascale+Mpsoc and two chips of AD9371. Ours is a linux based design. When I Run IIO oscilloscope in my pc and connect to my custom board, I am able to detect AD9371 chips,other iio devices. 
    

    Now I wanted to use Rx path spectrum plot available in IIO oscilloscope. To test this feature, I have added ADI UTIL CPACK and ADI AXI DMA to 2nd AD9371 chip Rx path and connected to zynq ultrascale+MPSoC. Updated device tree as shown below (added entries for dma) and added dma attributes for rx tpl core
    

     
    

     
    

    When card is booted up and connected through IIO oscilloscope, no rx i,q channels seen in the plot window and even in the list of IIO devices, this particular RX TPL core is not listed.
    

    With removing dma attributes in tpl core and building the image, Rx tpl core would be listed under iio devices.
    

    Please guide me to debug this issue.
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Sep 21, 2023 4:58 AM
            
            
												
						in reply to sumala
					
									
      
	
      

		
		
      
					
      I guess the axi-dma driver didn't probe correctly -
      

      Can you check:
      

      # ls -al /sys/bus/platform/drivers/dma-axi-dmac/ 
      total 0 
      drwxr-xr-x 2 root root 0 Jan 1 00:00 . 
      drwxr-xr-x 50 root root 0 Jan 1 00:00 .. 
      lrwxrwxrwx 1 root root 0 Jan 1 00:00 7c400000.dma -> ../../../../devices/soc0/fpga-axi@0/7c400000.dma 
      lrwxrwxrwx 1 root root 0 Jan 1 00:00 7c420000.dma -> ../../../../devices/soc0/fpga-axi@0/7c420000.dma 
      --w------- 1 root root 4096 Jan 1 00:00 bind 
      --w------- 1 root root 4096 Jan 1 00:00 uevent 
      --w------- 1 root root 4096 Jan 1 00:00 unbind 
      # 
      

      -Michael
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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