[hpsdr] Cannot flash Mercury-EU with Metis and HPSDR

[John Melton]

Hi Berndt,

Great that this has been resolved. At least the problem identified if
not fixed yet.

I have one of the mini USB Blasters and it works great.  Even supports
NIOS II which my older USB Blaster did not.

-- John g0orx/n6lyt

On Sat, 2011-04-02 at 02:21 +1030, Berndt Josef Wulf wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> G'day,
> 
> Many thanks to all of you who responded to my email in support.
> 
> Here an update and the conclusions to the above problem for the benefit of 
> those who are facing the same dilemma:
> 
> TAPR Mercury vs Mercury-EU FPGA pin assignments
> ================================
> The design of TAPR Mercury and Mercury-EU differ to the extend that some of 
> the otherwise unused FPGA pins are assigned to different locations on the 
> ATLAS bus, including signals C5 and C6 utilized by Metis to communicate with 
> the target board. This caused HPSDRProgrammer to fail to flash the Mercury-EU 
> card. lt will require a special version of Mercury_JTAG file to work around 
> this problem. My feeling is that the purpose of unused pins of the FPGA were 
> not part of the original design specifications of the Mercury board.
> 
> As Mercury-EU is produced outside of TAPR, the problem remains of finding 
> someone with the expertise and time to produce a modified version of the 
> Mercury_JTAG file for Mercury-EU.
> 
> My solution
> ========
> I rediscovered my old ByteBlaster and used the Altera programming application 
> to upgrade the Mercury board to version 6.4. I've ordered a Mini USB Blaster, 
> available for under US$13.00 on eBay including shipping, as PCs with parallel 
> ports are getting harder to find.
> 
> 73, Berndt
> VK5ABN
> 
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