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Explorer
Explorer
2,731 Views
Registered: ‎04-09-2008

IBERT and Microblaze?

Has anyone in the community tried generating an ISE project with both a Core Generator IBERT core and an EDK Microblaze system?  I'm trying to optimize a Marvell PHY link on a custom board.  The IBERT alone works well with near-side loopback enabled.  In order to enable loopback in the Marvell PHY, I need to write an MDIO register.  I added a simple EDK project alongside the IBERT that includes a Microblaze, some memory, and an lltemac instance.  The LLTEMAC instance's MDIO and Phy reset ports are wired to the PHY.  The rest of the GMII interface is left floating / grounded.

 

If I comment out the EDK system in my top-level, the IBERT works with near-side loopback.   If I uncomment the EDK system, the Microblaze source executes and I can read/write the MDIO registers.  However, the IBERT console in Chipscope can't seem to communicate with the IBERT core.

 

Is this because my Boundary Scan chain is broken, since I have an MDM and an ICON in my system?

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2 Replies
Explorer
Explorer
2,730 Views
Registered: ‎04-09-2008

Re: IBERT and Microblaze?

I tried implementing my system with an MDM in the EDK.  I see the same behavior.

 

The IBERT console seems unresponsive.  When I change some of the parameters, for instance the TX termination voltage, the drop-down seems to be stuck on FLOAT no matter what I select.

 

The TX PLL and RX PLL are always Unlocked.

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Visitor yuriy_o
Visitor
2,442 Views
Registered: ‎12-01-2012

Re: IBERT and Microblaze?

Hi pcurt

I am wondering if you have manage to resolve that issue

I am trying something similar and wondering if it is fundamentally possible

Thnaks in advance

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