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Reaching speeds of up to 1 GHz, the ADSP-SC59x processors are members of the SHARC® family of products. The ADSP-SC59x processor is a dual-SHARC+® core...
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Assistance Needed to access IS25LX256 on SC595SOM , with OSPI Driver Issue in DTR Mode.



		

			

									
					    sohm
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 6, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Software
    
    		        		            		    
    Product Number:  ADSP-SC594  
    
    		        		    		    	
			
    

    

    

    

    

    

    

    Dear ADI Engineering Zone Team,
    

    I hope this message finds you well. We are currently working with the SC594 SOM and facing an issue while trying to access the IS25LX256 flash on a FreeRTOS environment using the OSPI driver. By default the flash is in STR mode and we are able to successfully configure it to DTR mode . Specifically, we are encountering difficulties when attempting to read the flash ID information in DTR mode.
    

    Below is stig structure  we are using to access the flash in DTR mode:
    

    

    

    

    

    

    STIG_Command.CmdOpcode         = CMD_JEDEC_READ;

    

    STIG_Command.CmdOpcode2        = 0x00;

    

    STIG_Command.eBusMode          = ADI_OSPI_STIG_OPI;

    

    STIG_Command.eTransferMode     = ADI_OSPI_TRANSFERMODE_DTR;

    

    STIG_Command.NumOfDummyCycles  = 8;

    

    STIG_Command.ModeDataEnable    = 0;

    

    STIG_Command.ModeData          = 0;

    

    STIG_Command.eDataMode         = ADI_OSPI_STIG_READDATA_EN;

    

    STIG_Command.DataSize          = 6;

    

    STIG_Command.AddressEnable     = 1;

    

    STIG_Command.AddrSize          = ADI_OSPI_CMD_ADDR_SIZE_4;

    

    STIG_Command.Address           = 0;

    

    STIG_Command.pBuffer           = deviceIDData;
    

    

    

    

    status = adi_ospi_StigCommand(*phDevice, &STIG_Command);

    

    

    We are experiencing a runtime error when attempting to read the flash IDs in DTR mode. Attached is a screenshot of the error message for your reference.
    

    Could you please provide guidance on how to properly perform read and write operations on the flash when it is configured in DTR mode? If there is any additional information you require from our end to assist with troubleshooting, please let us know.
    

    Thank you for your attention to this matter, and we look forward to your guidance.
    

     
    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    
										

    
				Focusing on the DTR issue. 
    
[edited by: sohm at 12:58 PM (GMT -4) on 6 May 2024]
				
    
						
			                
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    Tags: 
                                            
                 Audio Signal Processors
                
                                                    
                 ADSP-SC594
                
                                                    
                 IS25LX256
                
                                                    
                 software
                
                                                    
                 ospi
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi Soumya,
      

      Thank you for your query. Can you please share your sample code which simulates this issue to us.
      

      Did you check whether you are able to read the flash ID in DTR mode configuration with non-RTOS environment.
      

      Waiting for your reply.
      

      Best Regards,
      Santhakumari.K
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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						in reply to santha.vijay
					
									
        
	
        

		
		
        
					
        Hi  ,
        

        

        Thanks for your reply. As you asked, I have attached the sample code where we are trying to configure the IO Mode register in octal DDR mode and we are trying to read back the same register. For your information after configuring IO mode register to octal DDR mode we are not able to read the device information in STR mode , which means writing to the IO register is getting successfully updated. As soon as we are trying to read back either IO mode register or device information in octal Mode (STIG_Command.eBusMode   = ADI_OSPI_STIG_OPI; ) we are facing this runtime issue.
        

        We are checking form our end to read the flash ID in DTR mode configuration with non-RTOS environment. Mean while if you can go through the sample code and give us some suggestions will be helpful. Please let us know if you need any other information.
        

        Thank You.
        

        .



        
    
        
        Fullscreen
        OSPI_driver.txt
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        flash_configDTRMode
{
	BaseType_t xReturn;

	uint8_t StatusBuffer[2] = {0};
	uint8_t data			= 0xE7;

	ADI_OSPI_STIGCMD STIG_Command;

	/* Performing write enable operation */

	STIG_Command.CmdOpcode       		= FLASH_WR_EN;
	STIG_Command.CmdOpcode2      		= 0;
	STIG_Command.eBusMode        		= ADI_OSPI_STIG_SINGLE;
	STIG_Command.eTransferMode   		= ADI_OSPI_TRANSFERMODE_STR;
	STIG_Command.NumOfDummyCycles		= 0;
	STIG_Command.ModeDataEnable  		= 0;
	STIG_Command.ModeData		   	= 0;
	STIG_Command.eDataMode	   		= ADI_OSPI_STIG_NODATA;
	STIG_Command.DataSize		   	= 1;
	STIG_Command.AddressEnable   		= 0;
	STIG_Command.AddrSize		   	= ADI_OSPI_CMD_ADDR_SIZE_1;
	STIG_Command.Address         		= 0;
	STIG_Command.pBuffer         		= 0;

	xReturn = adi_ospi_StigCommand(*phDevice, &STIG_Command);
	if(xReturn != ADI_OSPI_SUCCESS)
	{
		DebugP_log("Failed to send the WREN command to flash. Error: %d \n", xReturn);
		return xReturn;
	}

	/* Reading the Status register and checking for the WIP bit wherther the flash is in ready state of in busy state */

	FlashBusyWait(*phDevice);

	STIG_Command.CmdOpcode       		= 0x81;		//Writing Non volatile Register		
	STIG_Command.CmdOpcode2      		= 0x00;
	STIG_Command.eBusMode        		= ADI_OSPI_STIG_SINGLE;
	STIG_Command.eTransferMode   		= ADI_OSPI_TRANSFERMODE_STR;
	STIG_Command.NumOfDummyCycles		= 0;
	STIG_Command.ModeDataEnable  		= 0;
	STIG_Command.ModeData		   	= 0;
	STIG_Command.eDataMode	   		= ADI_OSPI_STIG_WRITEDATA_EN;
	STIG_Command.DataSize		   	= 1;
	STIG_Command.AddressEnable   		= 1;
	STIG_Command.AddrSize		   	= ADI_OSPI_CMD_ADDR_SIZE_4;
	STIG_Command.Address         		= 0x00;		//IO mode configguration Register
	STIG_Command.pBuffer         		= &data;	//Writing Value 0xE7 to configure for DDR mode

	xReturn = adi_ospi_StigCommand(*phDevice, &STIG_Command);
	if (xReturn != ADI_OSPI_SUCCESS)
	{
		printf ("Failed Stig command write REG. Error: %d\r\n",xReturn);
	}


	printf ("Writing is Done\r\n");

	
	printf ("Reading Register in DTR Mode\r\n");

	STIG_Command.CmdOpcode       		= READ_VOLATILE_CONFIG_REG;	//0xB5;	//Reading volatile Reg
	STIG_Command.CmdOpcode2      		= 0x00;
	STIG_Command.eBusMode        		= ADI_OSPI_STIG_OPI;		// Octal Mode
	STIG_Command.eTransferMode   		= ADI_OSPI_TRANSFERMODE_DTR_P;	
	STIG_Command.NumOfDummyCycles		= 8;
	STIG_Command.ModeDataEnable  		= 0;
	STIG_Command.ModeData		   	= 0;
	STIG_Command.eDataMode	   		= ADI_OSPI_STIG_READDATA_EN;	
	STIG_Command.DataSize		   	= 1;
	STIG_Command.AddressEnable   		= 1;
	STIG_Command.AddrSize		   	= ADI_OSPI_CMD_ADDR_SIZE_4;
	STIG_Command.Address         		= 0x00;				//IO mode configguration Register
	STIG_Command.pBuffer         		= StatusBuffer;

	xReturn = adi_ospi_StigCommand(*phDevice, &STIG_Command);

	if (xReturn != ADI_OSPI_SUCCESS)
	{
		printf ("Failed Stig command read REG\r\n");
	}

	printf ("The register: 0x%x\r\n", StatusBuffer[0]);
	printf ("The register: 0x%x\r\n", StatusBuffer[1]);




	return xReturn;
}
        

        


        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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						in reply to sohm
					
									
          
	
          

		
		
          
					
          Hi  ,
          

          As suggested we checked reading  the flash ID in DTR mode configuration with non-RTOS environment but here also we are facing the same run time issue as mentioned above .
          

          We are waiting for your reply . Thank You. 
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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													0
							
			
				
									
							        
			
			
			
          •  Analog Employees  
          
            
			                            
                                                                                                                        
            
				
			
            
					
          
	
          

		
		
          
					
          As mentioned in the IS25LX256 datasheet cmdopcode2 must be repeated of cmdopcode (For Octal DDR Mode), datasheet screenshot below.
          

           
          

          

          Modify the code like below,
          

          

          STIG_Command.CmdOpcode         = CMD_JEDEC_READ;
          

          STIG_Command.CmdOpcode2        = CMD_JEDEC_READ;
          

          STIG_Command.eBusMode          = ADI_OSPI_STIG_OPI;
          

          STIG_Command.eTransferMode     = ADI_OSPI_TRANSFERMODE_DTR;
          

          STIG_Command.NumOfDummyCycles  = 8;
          

          STIG_Command.ModeDataEnable    = 0;
          

          STIG_Command.ModeData          = 0;
          

          STIG_Command.eDataMode         = ADI_OSPI_STIG_READDATA_EN;
          

          STIG_Command.DataSize          = 6;
          

          STIG_Command.AddressEnable     = 1;
          

          STIG_Command.AddrSize          = ADI_OSPI_CMD_ADDR_SIZE_4;
          

          STIG_Command.Address           = 0;
          

          STIG_Command.pBuffer           = deviceIDData;
          

          

          

          

          status = adi_ospi_StigCommand(*phDevice, &STIG_Command);
          

          

          Thanks,
          

          Vignesh N
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
						
						
				
				
		
		
          
			
		
          
	
          

          

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						in reply to EZAutoReply
					
									
            
	
            

		
		
            
					
            Hi  ,
            

            

            Thank you for your reply. As you mentioned, we tried reading the device information with the above configuration but still We are seeing the same run time error. 
            

            
			
            

		
			
	      

		
		
	
            
	
            
		
            
			
		
            
	
            
	
            
		
						
						
				
						
				
				
		
		
            
			
		
            
	
            

            

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													0
							
			
				
									
							        
			
			
			
            •  Analog Employees  
            
            
			                            
                                                                                                                        
            
				
			
            
												
						in reply to sohm
					
									
            
	
            

		
		
            
					
            When I look at your code, it seems like you are writing into the Flash Volatile register to configure the Flash in Octal DTR Mode. If remember there is a problem with IS25LX256 Volatile register. Use one of your board and configure the Flash in Octal Mode using Non-Volatile Config register, power cycle the board and read JEDEC ID in Octal DDR Mode.
            

            By this if you can confirm either the problem is on Flash or OSPI Controller, this would help us to proceed the debug further.
            

            

            Thanks,
            

            Vignesh N
            
			
            

		
			
	      

		
		
	
            
	
            
		
            
			
		
            
	
            
	
            
		
						
						
				
						
				
				
		
		
            
			
		
            
	
            

            

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