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ADAR1000 Recommended for New Designs
The ADAR1000 is a 4-channel, X and Ku frequency band, beamforming core chip for phased arrays. This device operates in half-duplex between receive and...
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ADAR1000 on Analog.com

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ADAR1000 SPI



		

			

									
					    ozden.erdinc
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 19, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
     Hello, I am using ADAR1000 but unfortunately, there is no reference source code. I could not find anywhere. Just we have SPI PROGRAMMING EXAMPLE in the Datasheet. I want to make and control the SPI communication protocol without using GUI. Can you provide example source code?
    

    Best Regards.
    

    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Beamformers  Phase Shifters  and Vector Modulators
                
                                                    
                 adar1000
                
                                                    
                 Beamformers
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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                on Aug 5, 2019 4:25 AM
            
            
												
						in reply to jdobler
					
									
        
	
        

		
		
        
					
        Yes thank you very much, I think its possible and not difficult to implement it....my only question is, that I dont know how to write the adresses...for example there is the following function to send a byte:
        

        # Function to send a byte to specific GPIO pin
        def tfr_byte2(data):
            for i in range (0,8):
                GPIO.output(DATA, data & 0x01)
                pulseHigh(W_CLK)
                data=data>>1
            return
        

        

        this was the example for AD9850, but for ADAR1000 you have all the adresses and contents, for example 0x180064. Can you just tell me how you would do it for this adress using the function tfr_byte?
        

        

        It really would help me a lot...
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        
            
						
                            
            
            				
            
                on Aug 5, 2019 11:36 AM
            
            
												
						in reply to AShuhl817
					
									
        
	
        

		
		
        
					
        A few things:
        

          

        • You need to clock in the 16 preceding address bits, so you need to change the range function
          • 

        • You also need to keep the CSB high, unless you are writing bits to the SPI
          • 

        

        So, I think you'd want to change the tfr_byte2() to something like this (changed in bold):
        

        def tfr_byte2(data):
        

            GPIO.output(CSB, false)  #Pull the CSB low to enable the SPI port
            for i in range (0,24):
                GPIO.output(DATA, data & 0x01)
                pulseHigh(W_CLK)
                data=data>>1
            GPIO.output(CSB, true)  #Pull the CSB high to disable the SPI port
        

             return
        

        You will need to take care of the CSB-to-GPIO pin number mapping in your code.
        

        Also, in your initialization code of the GPIO lines, you'll want to start the CSB pulled high with:
        

        #Initialization Code
        

        GPIO.output(CSB, true)  #Pull the CSB high to disable the SPI port
        

        

        No guarantees that this works, but it should give you a pretty good start.  Hope this helps.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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                on Aug 16, 2019 2:56 AM
            
            
												
						in reply to jdobler
					
									
          
	
          

		
		
          
					
          hi , I have one question...with the ADAR1000 you also can set up the phase assignment. With the phase assignment you can choose your maxima of azimut and elevation angle...
          

          Could you give me an advice how I can realize an elevation angle of 20 degrees for example with the phase assignment?
          

          Thanks in Advance
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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          •  Analog Employees  
          
            
						
                            
            
            				
            
                on Aug 16, 2019 1:02 PM
            
            
												
						in reply to AShuhl817
					
									
          
	
          

		
		
          
					
          This is very system dependent.  I would recommend taking a look at: https://en.wikipedia.org/wiki/Phased_array
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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