Whats going on here?

Hi FPGA experts

I am a little bit desperate. We have designed a hardware module in EDK

6.2 which was working properly on our ML300 Board. We tested the logical bahaviour with thousands of testcases, and on the Board we executed 8000 instruction. In the end it output the correct result. Now we switched to EDK 7.1 and guess what happend... the module doesnt work anymore. The exact same core already outputs the false result in the first execution of a digit-multiplier. Its really strange as here 25 iterations are required to return the result. Finally exactly 1!!!! bit is incorrect. I have no clue what the problem could be. Is there a possibility that the mapping process somehow failed? Or that the board is broken? Any other ideas what could cause this problems?

Cheers for any helpful comment Philipp

Reply to
Philipp
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"Philipp" schrieb im Newsbeitrag news: snipped-for-privacy@g43g2000cwa.googlegroups.com...

Hi Phipp

welcome to the real world.

EVERY EDK update (incl service pack) may make your working design non working. this may be either hardware issue or newly introduced compiler erratic behaviour.

I have updated projectects from V2PDK to 7.1, and I just know. It is like that. In some cases you may be lucky and all works, in other cases you need to change your source code or some settings, etc, to make the working design to work again. Sometimes its not fun at all.

Antti

Reply to
Antti Lukats

Some of our working designs under 6.2 fail to even route under 7.1, although I guess that is preferable to having an implementation fail, perhaps in subtle ways.

Our FAE advised us to wait for the next ISE 7.1 service pack which should be out in less than a month.

I was hoping as the EDK tools matured, upgrades would be less painful, but apparently not.

Reply to
joe4702

"joe4702" schrieb im Newsbeitrag news: snipped-for-privacy@o13g2000cwo.googlegroups.com...

NO, they are not. That's pitty as it really takes a REAL LOT OF time every time wasted when something is broken after tools update.

Antti

Reply to
Antti Lukats

"Antti Lukats" schrieb im Newsbeitrag news:d62vs6$5hm$03$ snipped-for-privacy@news.t-online.com...

OK problem, old solution.

Never change a running system.

Regards Falk

Reply to
Falk Brunner

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