Has anyone been able to successfully simulate a
test of the MGT on the
Virtex-4?  I've been trying to instantiate the GT11_custom for a while,
and it just does not seem to work.  Basically I've instantiated two
MGT's and have tied them together via the RXN/P - TXN/P.  I've tried to
use 8B/10B encoding and that didn't seem to work.  This lead me to
strip the MGT completely and use it only as a SERDES device, yet it
still does not seem to work.  (Assuming that whatever data I send on
TXData_IN is what should be on RXDOUT.)

I've been told to try the Aurora primative and I've followed the
"Getting Started" document and it will not simulate using a Virtex-4.
However, if I choose a Virtex 2 device, such as in the example
document, then it simulates fine.

Is this an issue with the Virtex-4?

If anyone out there has ever got the Virtex 4 to simulate the MGTs, can
you please help me?

Thanks,

JP

Hi JP,
The Aurora core's example testbench(sample_test) has been extensively tested
and should work out of the
box.
Can you please give me some details about the design that you generated from
CORE Gen? This will help me debug your problem.
1)What line rate and data width did you choose.
2)Is this a single lane design?
3)Which simulator are you using?
4)Are you running the example simulation provided(sample_test.do)? The
instructions
for running this simulation are provided in the Getting started Guide.

Thanks,
Nanditha


"JarJarJP12" <j...@gmail.com> wrote in message
news:1...@o13g2000cwo.googlegroups.com...
> Has anyone been able to successfully simulate a test of the MGT on the
> Virtex-4?  I've been trying to instantiate the GT11_custom for a while,
> and it just does not seem to work.  Basically I've instantiated two
> MGT's and have tied them together via the RXN/P - TXN/P.  I've tried to
> use 8B/10B encoding and that didn't seem to work.  This lead me to
> strip the MGT completely and use it only as a SERDES device, yet it
> still does not seem to work.  (Assuming that whatever data I send on
> TXData_IN is what should be on RXDOUT.)
>
> I've been told to try the Aurora primative and I've followed the
> "Getting Started" document and it will not simulate using a Virtex-4.
> However, if I choose a Virtex 2 device, such as in the example
> document, then it simulates fine.
>
> Is this an issue with the Virtex-4?
>
> If anyone out there has ever got the Virtex 4 to simulate the MGTs, can
> you please help me?
>
> Thanks,
>
> JP
>

Nanditha -

I was able to use the Aurora core using the Virtex-2 device.  However I
get errors when using a Virtex-4 device.

1)What line rate and data width did you choose.
I am using the default line rate of 3.125 and lane width of 4.

2)Is this a single lane design?
Yes.

3)Which simulator are you using?
Model Sim 6.0c SE

4)Are you running the example simulation provided(sample_test.do)? The
instructions
for running this simulation are provided in the Getting started Guide.
Yes I am.  I was able to simulate it using a Virtex-2 device but I get
the following errors with a virtex-4:

# ** Error: (vsim-3733) ../src/mgt_wrapper.vhd(748): No default binding
for component at 'gt11_custom_inst'.
#  (Generic 'rx_los_threshold' is not on the entity.)
#         Region:
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst
# ** Error: (vsim-3733) ../src/mgt_wrapper.vhd(748): No default binding
for component at 'gt11_custom_inst'.
#  (Generic 'rx_los_invalid_incr' is not on the entity.)
#         Region:
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst
# ** Error: (vsim-3733)
C:/Xilinx/vhdl/src/unisims/unisim_SMODEL.vhd(25803): No default binding
for component at 'gt11_swift_bw_1'.
#  (Generic 'rx_los_threshold' is not on the entity.)
#         Region:
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst/gt11_swift_bw_
1
# ** Error: (vsim-3733)
C:/Xilinx/vhdl/src/unisims/unisim_SMODEL.vhd(25803): No default binding
for component at 'gt11_swift_bw_1'.
#  (Generic 'rx_los_invalid_incr' is not on the entity.)
#         Region:
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst/gt11_swift_bw_
1

I'm sure I am doing something wrong because I recall a Xilinx Tech
Support person telling me that the Aurora Core has work for the
Virtex-4.  I was working with the gt11_custom but quit using it once
the support person told me that it does not work (which seemed like a
funny thing to admit to your customer) and have moved onto the Aurora
Core.  I am trying to modify some re-use code from a previous project
that used the Virtex-2pro's RocketIO for SL240 interface.  However the
MGT on the Virtex-4 has not been very compliant.

Thanks for your reply and any help would be much appreciated.

JP

Nevermind, I figured out why I was getting that
error.  Seems my
modelsim.ini was changed from another project.  Any comments you still
have will grateful.  I doubt if solving this error is going to push me
over the edge in getting it to work the way I want it to.

Thanks,

JP

Hi JP,
Please refer to Answer Record #
21577(http://www.xilinx.com/xlnx/xil_ans_display.jsp?iLanguageID=1&iCountryI
D=1&getPagePath=21577) on the Xilinx website for info on how to resolve the
problem you are seeing.
Basically, what has happened is, the RX_LOS_THRESHOLD_INCR and
RX_LOS_THRESHOLD attributes were removed from the smartmodel in 7.1i Service
Pack 3. Hence the error that you are seeing about these attributes not being
present in the entity. What you will need to do is delete all mentions of
these attributes from the MGT wrapper file (src/mgt_wrapper.v).
Doing this should get the simulation running. Let me know how it goes or if
you have any other issues/questions.

Thanks,
Nanditha


"JarJarJP12" <j...@gmail.com> wrote in message
news:1...@g47g2000cwa.googlegroups.com...
> Nanditha -
>
> I was able to use the Aurora core using the Virtex-2 device.  However I
> get errors when using a Virtex-4 device.
>
> 1)What line rate and data width did you choose.
> I am using the default line rate of 3.125 and lane width of 4.
>
> 2)Is this a single lane design?
> Yes.
>
> 3)Which simulator are you using?
> Model Sim 6.0c SE
>
> 4)Are you running the example simulation provided(sample_test.do)? The
> instructions
> for running this simulation are provided in the Getting started Guide.
> Yes I am.  I was able to simulate it using a Virtex-2 device but I get
> the following errors with a virtex-4:
>
> # ** Error: (vsim-3733) ../src/mgt_wrapper.vhd(748): No default binding
> for component at 'gt11_custom_inst'.
> #  (Generic 'rx_los_threshold' is not on the entity.)
> #         Region:
>
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst
> # ** Error: (vsim-3733) ../src/mgt_wrapper.vhd(748): No default binding
> for component at 'gt11_custom_inst'.
> #  (Generic 'rx_los_invalid_incr' is not on the entity.)
> #         Region:
>
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst
> # ** Error: (vsim-3733)
> C:/Xilinx/vhdl/src/unisims/unisim_SMODEL.vhd(25803): No default binding
> for component at 'gt11_swift_bw_1'.
> #  (Generic 'rx_los_threshold' is not on the entity.)
> #         Region:
>
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst/
gt11_swift_bw_1
> # ** Error: (vsim-3733)
> C:/Xilinx/vhdl/src/unisims/unisim_SMODEL.vhd(25803): No default binding
> for component at 'gt11_swift_bw_1'.
> #  (Generic 'rx_los_invalid_incr' is not on the entity.)
> #         Region:
>
/sample_tb/aurora_sample_2_i/aurora_module_i/mgt_wrapper_i/gt11_custom_inst/
gt11_swift_bw_1
>
> I'm sure I am doing something wrong because I recall a Xilinx Tech
> Support person telling me that the Aurora Core has work for the
> Virtex-4.  I was working with the gt11_custom but quit using it once
> the support person told me that it does not work (which seemed like a
> funny thing to admit to your customer) and have moved onto the Aurora
> Core.  I am trying to modify some re-use code from a previous project
> that used the Virtex-2pro's RocketIO for SL240 interface.  However the
> MGT on the Virtex-4 has not been very compliant.
>
> Thanks for your reply and any help would be much appreciated.
>
> JP
>

Nanditha -

You rock!  Thanks, that solved that issue and has allowed me to
simulate the sample test of the Aurora core.  Now I'm trying to
incorporate a Coregen created Aurora core into an existing project, but
it doesn't seem to like me doing this.  I have an existing project in
ISE and I add the <aurora_core>.xco.  Whenever I try to view the HDL
Functional Model it regenerates the core but does not display the HDL.
Whenever I double click on Manage Core, it invokes Coregen but then
says that my device is not the virtex-4 and thus does not have the
Aurora Core.  The specific error is:

ERROR:sim:160 - Could not find requested IP (Aurora,2.3) for currently
selected part.

I go to project options and it displays that my device is not virtex-4
but Automotive Coolrunner2.  I change it to the correct device, but
this does nothing.  Any idea why this is?

Also, I've noticed in the sample_test of the Aurora core that it uses
the GT11_custom instantiation.  This leads me to believe that if I use
a GT11_custom core via Architect Wizard and have the attributes match
those of the Aurora Core it would work in the same fashion.  Is this
true?

Thanks again for all your help!

JP