flip inverted signal pairs

See merge request !5

Corrections

See merge request !4

add crossbar parameters

not self-checking

Crossbar integration, TB and Docs

See merge request !3

Integrate crossbar
Add crossbar test case

Add specs

parametrize counters

Docs and signal remap

When two writes happen consecutively the first write may not update the counter in the internal registers of the counter. Counters didn't bypass the results of the write, since counters are registered twice, one in the couynter module and once in the registers fo the wrapper, without the bypass the output was oscilating between the new value and the last value of the counter