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Hi
I 'm programming something and with this code I don't get any error

tel := tel +1;
if (tel = 4) then
tel := 0;
rico := rico + 20;

if (rico = 100) then
rico := 0;
som := 0;
end if;


end if;

som := som + rico;

klx := 170;
grx := 190;


if (x_pos > klx and x_pos < grx) then
if (y_pos > 240 and y_pos < 260) then
sec_tek <= '1';
else
sec_tek <= '0';
end if;
else
sec_tek <= '0';
end if;


but when I change

klx := 170;
grx := 190;

to

klx := 170 + som;
grx := 190 + som;

I get this error message

FATAL_ERROR:Xststedge.c:128:1.4 - Signal tekensec_main_som<0> has no
source after simplification. This may be due to a non load
combinatorial loop. Process will terminate. To resolve this error,
please consult the Answers Database and other online resources at
http://support.xilinx.com. If you need further assistance, please open
a Webcase by clicking on the "WebCase" link at
http://support.xilinx.com


Can somebody help me?

Mich

cant be sure without the whole process block but try using "rico"
instead of "som" as its anyhow optimized.

Mich wrote:
> Hi
> I 'm programming something and with this code I don't get any error
>
> tel := tel +1;
> if (tel = 4) then
> tel := 0;
> rico := rico + 20;
>
> if (rico = 100) then
> rico := 0;
> som := 0;
> end if;
>
>
> end if;
>
> som := som + rico;
>
> klx := 170;
> grx := 190;
>
>
> if (x_pos > klx and x_pos < grx) then
> if (y_pos > 240 and y_pos < 260) then
> sec_tek <= '1';
> else
> sec_tek <= '0';
> end if;
> else
> sec_tek <= '0';
> end if;
>
>
> but when I change
>
> klx := 170;
> grx := 190;
>
> to
>
> klx := 170 + som;
> grx := 190 + som;
>
> I get this error message
>
> FATAL_ERROR:Xststedge.c:128:1.4 - Signal tekensec_main_som<0> has no
> source after simplification. This may be due to a non load
> combinatorial loop. Process will terminate. To resolve this error,
> please consult the Answers Database and other online resources at
> http://support.xilinx.com. If you need further assistance, please open
> a Webcase by clicking on the "WebCase" link at
> http://support.xilinx.com
>
> Can somebody help me?

Looks like you're a software guy trying to implement hardware ...
you've written a huge combinatorial loop.

-a

I know
but the strange thing it
it seams that klx and grx does not change
how is this ^possible?

Mich

I know
but the strange thing it
it seams that klx and grx does not change
how is this ^possible?

tomorrow I 'm back at school and post all the code

Mich