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Contributor
Contributor
205 Views
Registered: ‎05-29-2018

7z015 high performances Interface using AXI3 ,burst length can not set to others except 16.

I am using zynq 7015 HP interface to write data . If my total data is an integer multiple of 128 bytes, such as 1280 bytes . I set the burst length to 16. It works ok. If my total data is an integer multiple of 120 bytes ,such as 1200 bytes. I set the burst length to 15. It does not work ,it transfers only one burst to my DDR then stop . I can not get the reason. I doubt it is related to burst length.   I set the burst length to 8. It does not work  at all. ONLY CAN BE SET TO 16.

but my axi3 interface shows that max burst length is 16.(1-16).  and my  burst type is set to  "01"  (o_awburst <= "01")   (o_arburst <= "01")  it means my burst type  is INCR type ,should be set 1-16  at any number.  

but  in my application the burst length is only be set  16    I can not find the reason

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Xilinx Employee
Xilinx Employee
157 Views
Registered: ‎10-04-2016

Re: 7z015 high performances Interface using AXI3 ,burst length can not set to others except 16.

Hi @zengzxxilinx,

I'm having difficulty following your question. You make several references to setting various burst lengths. How are you doing this? Are you programming some IP to perform a transfer to PS DDR?

Could you post a block diagram to explain which IPs are involved?

If you can post a trace of a failing transfer, that would also help.

Regards,

Deanna

 

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