[hpsdr] HPSDRProgrammer question

tbruns tbruns at mocha42.com
Thu Sep 8 05:24:08 PDT 2011


Ah, now it makes sense. Many thanks!

73 Tom KC5L

On 09/08/2011 02:41 AM, Jeremy McDermond wrote:
>
> On Sep 7, 2011, at 7:07 PM, tbruns wrote:
>>
>> My question is: What is the purpose of the default JTAG program file and under what circumstances would one want to use something other than the default?
>
> The automatically selected JTAG file is a "helper" file.  It programs the FPGA such that it can write through to the flash chip on the target board.  The FPGA on Metis has no direct access to the flash chip on the target board, so it has to program that flash chip through the FPGA on the target board.  The JTAG helper passes through those bits from the FPGA on Metis through the Atlas bus to the FPGA on the target board and finally to the flash chip on the target board.
>
> I currently know of no other use for anything other than the default file shipped with HPSDRProgrammer.  There may be a use in the future.
>
>> 73 Tom KC5L
>
> --
> Jeremy McDermond (NH6Z)
> Xenotropic Systems
> mcdermj at xenotropic.com
>
>
>


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