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Comp.Arch.FPGA | CPLD program editing

There are 3 messages in this thread.

You are currently looking at messages 0 to 3.

CPLD program editing - abhi - 2005-09-29 10:08:00

Hi Group,

I need to edit a program loaded in a CPLD.I can read a JDEC file from
the CPLD.How can I convert that file into a readable program which I
can edit?

Thanks



Re: CPLD program editing - Rene Tschaggelar - 2005-09-29 11:48:00

abhi wrote:

> Hi Group,
> 
> I need to edit a program loaded in a CPLD.I can read a JDEC file from
> the CPLD.How can I convert that file into a readable program which I
> can edit?

Some may have a read protection. In the other
cases you can read the JTAG. How to convert
this into a readable diagram or code I wouldn't
know. Theoretically it would be possible.

Rene
-- 
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
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Re: CPLD program editing - Antti Lukats - 2005-09-30 04:19:00

"abhi" <a...@gmail.com>
schrieb im Newsbeitrag
news:1...@o13g2000cwo.googlegroups.com...
> Hi Group,
>
> I need to edit a program loaded in a CPLD.I can read a JDEC file from
> the CPLD.How can I convert that file into a readable program which I
> can edit?
>
> Thanks
>

assuming you have an succesful readback of non protected chip the conversion
*IS* possible. if it reasonable that depends.

for small GAL jed2eqn from Opal Jr (free download can be found with google)
does the job

For Xilinx XPLA3 we have a ready solution

http://shop.openchip.org/shop/product_info.php?cPath=2_27&products_id=37

For any other devices I think there are no existing solution at the moment

Antti