Re: [myhdl-list] Driving constants

[Jan D. <ja...@ja...>]

On 09/06/2011 02:27 PM, Sébastien Bourdeauducq wrote:
> On 09/06/2011 02:26 PM, Jan Decaluwe wrote:
>> On 09/05/2011 10:48 AM, Sébastien Bourdeauducq wrote:
>>> On 09/05/2011 10:01 AM, Jan Decaluwe wrote:
>>>> What would probably work is if such a method returns
>>>> an empty list, explicitly indicating that it has no
>>>> generators to contribute.
>>>
>>> Then how will MyHDL get the constant values to use, if all it gets from
>>> the method is an empty list?
>>
>>      From the initial value of the signals.
>
> And how do I set it?
>
> The signals are created by the __init__ method of the parent class. I
> could of course add parameters to this __init__ method to define the
> initial value of the signals, but it's quite messy and inelegant.

No, just use overloading, it works for constructors also.

I infer that some signals may have constant values that are
different depending on the subclass. (I find that strange,
because I would assume that the default initial value in
a protocol is always the same. But I don't know your
application of course.) In such a case, I would definitely
want to set it right to the correct value at construction
time.

-- 
Jan Decaluwe - Resources bvba - http://www.jandecaluwe.com
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