Re: [partial-reconfig] DCM STATUS signal problem

[<bartosr@xxxxxxxxxx>]

Hi,
answer to your second question about DCM location is yes, you can.

in UCF file you must use this constrain
INST mbmodule/mbsub/dcm_0/dcm_0/DCM_INST LOC=DCM_X2Y0;

The best way to obtain name of dcm instance is click on placed(routed) DCM module
in FPGAEditor (design can be routed as statical, name is always same) and
DCM location is showed in FPGAEditor, as well.

Regards,
Roman Bartosinski


______________________________________________________________
> Od: mlee@ee.ryerson.ca
> Komu: partial-reconfig@itee.uq.edu.au
> CC: 
> Datum: 06.05.2005 04:38
> Předmět: [partial-reconfig] DCM STATUS signal problem
>
> Hi All,
> 
> Sorry to bother you. I have no choice but to seek for your help on this.
> 
> I have a Virtex-II Partial Reconfiguration design, which contains 3
> modules (1 reconfig, 2 fixed). One of the fixed module is a Microblaze
> (MB) system which uses DDR memory on my Memec MB2V1000 board. EDK tool
> automatically generates 3 DCM modules to work with DDR memory when I set
> the processor clock and DDR clock to 66.67MHz (the lowest speed DDR can
> work at).
> 
> During the Active Implementation phase, when tring to MAP this MB module,
> it gave me this error which I have no idea what it means. One thing to
> note is that I used the "-u" switch, which does not remove logic. If I
> don't set "-u", many errors will come up telling me it cannot combine
> certain slices together, etc..
> 
> Anyways, for some reason, the mapper returns the following error message
> regarding that the other bits of the STATUS signal are used:
> 
> ERROR:LIT:144 - Only STATUS0, STATUS1 and STATUS2 can be used in DCM
> symbol
> "sys/dcm_2/dcm_2/DCM_INST" (output signal=sys/dcm_2/dcm_2/CLK0_BUF).
> 
> And for Partial Reconfiguration, do I have to LOC the DCM modules? Since
> DCMs are parts of the MB system, I assume they will be within the MB
> module's boundary, so I won't have to specifically LOC the DCMs? Or I am
> wrong~~ (very possible)
> 
> Does anyone have similar problem when working with DDR & DCM?
> 
> Thank you so very very much for your time and help!
> 
> 
> Peter Lee
> 
> --------------------------------------
> OPRAL Research Lab, Ryerson University
> 
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