Re: [myhdl-list] enums and non-local

[Christopher F. <chr...@gm...>]

On 2/11/2015 1:11 AM, JOSE MARIA GOMEZ CAMA wrote:
> Hello all,
>
> I am trying to use an enumeration to define the states of a finite state machine. There are examples where it seems to work, but I am not able to do that. Moreover, I have gone through the code and in the _analyze.py module it seems that only intbv are allowed to be seen as non-locals. I assume there is a reason for this filtering, but there is no information. Can anyone provide a hint?

Do you have an example of the enumeration not working?  I
have used it many times, you can peruse this example if
you like:
https://github.com/schoeberl/comphdl/blob/master/myhdl/vending/vending.py#L31

Also the examples on the MyHDL website:
http://www.myhdl.org/examples/sinecomp/#design

The nonlocals are a little more complicated and will be
enhanced (!) when porting to Py3k is completed.  In general
using /intbv/ is the safest approach.


     def m_some_module(*portmap):

         myvar = intbv(0, min=-8, max=8)

         @always...
         def rtl():
            myvar[:] = x + 1
            ...


Hope that helps,
Chris