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Altera_Forum
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11 years ago

incrementing an element in an array produces lots of (false) paths

Dear All In my VHDL I wish to count the number of "leading edges" on certain channels. There are 128 channels and I wish to be able to count up to 2^24. I define type matrix is array (0 to 12...
Altera_Forum's avatar
Altera_Forum
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11 years ago

There two issues here. One is the large number of counters each of width 24 bits, this requires resource and the dual port ram suggested by JosyB is best.

The other issue is that you are saying your counters are not independent when they should be but it must be your code. You need a loop to unroll into independent counters. There should be no counting dependency between them. 


for i in 0 to 127 loop
    counter(i) := counter(i) + 1;
end loop;

this shoud unroll to independant 128 counters