Re: Setting of enum values

Marcel Hellwig <[email protected]> Fri, 22 Jan 2016 19:39:29 +0100
Newsgroups	gmane.comp.python.myhdl
Message-ID	<[email protected]>
On 20.01.2016 23:11, Marcel Hellwig wrote:
> 
> Now, myhdl tells me:
> 
>> > myhdl.ConversionError: in file xxx.py, line 63:
>> >     Unsupported attribute: User
> line 63:
>> > if mode == CpuMode.User:


I finally found out, why this happens.
Because I don't like to write the same code twice, I outsourced the
if/elif section into a seperate function.

> def getRegisterbank(mode):
>     if mode == ProcMode.User or mode == ProcMode.System:
>         return 0
>     elif mode == ProcMode.Supervisor:
>         return 1
>     elif mode == ProcMode.Abort:
>         return 2
>     elif mode == ProcMode.IRQ:
>         return 4
>     elif mode == ProcMode.FIQ:
>         return 5
>     else:
>         return 3
> 
> @always_seq(clk.posedge, reset=reset)
> def write():
>     if we:
>         mul = 0
>         if mode == ProcMode.User or mode == ProcMode.System:
>             mul = 0
>         # ...
>         else:
>             mul = 3
>         # mul = getRegisterbank(mode)
>         re = regbank[mul*18 + rd]
>         regs[re].next = din
> 
> @always_comb
> def read():
>     # mul = getRegisterbank(mode)
>     mul = 0
>     re = regbank[mul*18 + rs]
>     sout.next = regs[re]
> 
> return write, read


And here is the problem. When I write it directly in the write/read
methods, everything works fine, but as soon as I call the
getRegisterbank function, it will complain about unsupported Attribute.
Is there a way around this? :/

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