Re: [partial-reconfig] crc error writing partial bitstreams to icap

[Justin Braun <justin.braun@xxxxxxxxxxxxx>]

Brian,

0x000000DF looks like an abort status word, pg 50-51 in the Virtex-4
configuration guide. I'm not familiar with the hwicap, but it seems like
this might have to do with switching from write to read.

Justin

On Thu, 2007-12-13 at 10:51 -0500, Brian Sutton wrote:
> Hi,
> 
>  
> 
> I am writing in regard to the following thread (just joined the list):
> 
>  
> 
> http://www.itee.uq.edu.au/~listarch/partial-reconfig/archive/2007/10/msg00006.html
> 
>  
> 
> I have a very similar situation – iMPACT programming of the device
> works whereas if I use the ICAP port I get CRC errors.
> 
>  
> 
> I am using EDK 9.2.01i with opb_hwicap v1.10a.  I can read the
> register space successfully but as soon as I try and load the partial
> bitstreams through ICAP I get CRC errors.  I tried disabling the CRC
> check in the bit files but this still did make partial reconfig
> through ICAP work.  
> 
>  
> 
> The one thing that I have noticed when using the hwicap driver is that
> each time I fill the BRAM with bitstream data and do a
> deviceWrite/readback the first word is not the expected value.  I have
> performed the same experiment with very simple command register
> accesses:
> 
>  
> 
> Packet = XHwIcap_Type1Write(XHI_AXSS_IDCODE) | 1;  // just picked a
> register I could r/w to, this is not done during reconfiguration
> 
> XHwIcap_StorageBufferWrite(&myICAP, 0, XHI_DUMMY_PACKET);
> 
> XHwIcap_StorageBufferWrite(&myICAP, 1, XHI_SYNC_PACKET);
> 
> XHwIcap_StorageBufferWrite(&myICAP, 2, XHI_NOOP_PACKET);
> 
> XHwIcap_StorageBufferWrite(&myICAP, 3, Packet);
> 
> XHwIcap_StorageBufferWrite(&myICAP, 4, 0xF0F0F0F0);   
> 
> XHwIcap_StorageBufferWrite(&myICAP, 5, XHI_NOOP_PACKET);
> 
> XHwIcap_StorageBufferWrite(&myICAP, 6, XHI_NOOP_PACKET);
> 
>  
> 
> Status = XHwIcap_DeviceWrite(&myICAP, 0, 7);
> 
>  
> 
> //sent
> 
> 40200000 : FFFFFFFF
> 
> 40200004 : AA995566
> 
> 40200008 : 20000000
> 
> 4020000C : 3001A001
> 
> 40200010 : F0F0F0F0
> 
> 40200014 : 20000000
> 
> 40200018 : 20000000
> 
>  
> 
> Status = XHwIcap_DeviceRead(&myICAP, 0, 7); 
> 
>  
> 
> //read
> 
> 40200000 : 000000DF
> 
> 40200004 : AA995566
> 
> 40200008 : 20000000
> 
> 4020000C : 3001A001
> 
> 40200010 : F0F0F0F0
> 
> 40200014 : 20000000
> 
> 40200018 : 20000000
> 
>  
> 
> The returned buffer is identical except for the XHI_DUMMY_PACKET.  The
> 0x000000DF is what I always get for the very first write out to the
> device through the ICAP.
> 
>  
> 
> Is this normal or can anyone shed insight into the problem?
> 
>  
> 
> Thanks,
> 
> Brian Sutton
> 
>  
> 
> 

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