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Observer kallensf
Observer
1,612 Views
Registered: ‎07-31-2017

SDK test DDR memory on prototypes

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Hi All,

 

Outside of using the memory test template, is it possible to test DDR memory via JTAG using scripts with SDK or other tools?  The intent is to test DDR when the protoboards arrive from fab.  The sample memory test still runs on a small part of DDR.  I suppose if the test runs, that should be proof that it's ok.  I'm just looking for other alternatives.

 

Thanks!

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Xilinx Employee
Xilinx Employee
2,437 Views
Registered: ‎10-21-2010

Re: SDK test DDR memory on prototypes

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Hi,

The simplest way via Jtag could be to download a bin file and then verify it thru XSDB (you can use dow and verify commands). However, Jtag is extremely slow (< 100 KB/sec), so it takes a quite a lot of time to verify a significant part of the DDR.

 

You should be able to modify the memory test in SDK to test full DDR, instead of a small range it currently tests. That will be lot faster and avoids dependency on Jtag, which may not be stable on proto boards

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Xilinx Employee
Xilinx Employee
2,438 Views
Registered: ‎10-21-2010

Re: SDK test DDR memory on prototypes

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Hi,

The simplest way via Jtag could be to download a bin file and then verify it thru XSDB (you can use dow and verify commands). However, Jtag is extremely slow (< 100 KB/sec), so it takes a quite a lot of time to verify a significant part of the DDR.

 

You should be able to modify the memory test in SDK to test full DDR, instead of a small range it currently tests. That will be lot faster and avoids dependency on Jtag, which may not be stable on proto boards

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Observer kallensf
Observer
1,545 Views
Registered: ‎07-31-2017

Re: SDK test DDR memory on prototypes

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Thanks, I'll use jtag  to test the short address range where the memory test program will reside, then use the memory test template to test the rest of 4GB.

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Xilinx Employee
Xilinx Employee
1,508 Views
Registered: ‎10-21-2010

Re: SDK test DDR memory on prototypes

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Just to clarify.. the memtest runs from OCM, so you dont have to test that range

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