Re: [myhdl-list] Object type is not supported in this context

[Jan C. <jan...@mu...>]

On 12/05/12 14:03, Jan Coombs wrote:
> This error message points to a blank line, which is always
> immediately before the start of a code block:

The complex error messages were caused by confusion about intbv 
indexing, using:
     memRdNetSlice.next = memRdSlice(NSW,0)
instead of:
     memRdNetSlice.next = memRdSlice[NSW:0]


As the code now converts to Verilog, although not VHDL, I tried to 
restore the enum code, just in case, but this still fails, likely 
in the block shown below:

> ExST = enum('Fetch1','Fetch2','NewAddr','Skip',  \
>                          'Gap','Broken', encoding='one_hot')
>
>
> The next block of code would be difficult without the enum, but
> this seems to be where the problem is:
>
>     @always_comb
>     def execNextStateLogic_AsyncNoVar():
>       ''' determine what next execution state will be '''
>       ''' line 159: Object type is not supported in this context:
> ExST '''
>       if reset:   execNextState.next = ExST.Skip
>       else:
>         if (execState==ExST.Fetch1):
>           if (memRdSlice==ToMem)|    \
>              (memRdSlice==Alu2op)|   \
>              (memRdSlice==Alu1op)|   \
>              (memRdSlice==FromMem):  \
>                   execNextState.next = ExST.Fetch2
>           elif (memRdSlice==Branch):   \
>                   execNextState.next = ExST.NewAddr
>           elif (memRdSlice==Skip)|  \
>                (memRdSlice==Lit)|   \
>                (memRdSlice==Call):  \
>                   execNextState.next = ExST.Skip
>           else:   execNextState.next = ExST.Gap
>         elif execState==ExST.Fetch2:  \
>                   execNextState.next = ExST.Gap
>         elif execState==ExST.NewAddr:
>           if (memRdMore==0):  \
>                   execNextState.next = ExST.Gap
>           else:   execNextState.next = ExST.NewAddr
>         elif execState==ExST.Skip:
>           if (memRdMore==0):  \
>                   execNextState.next = ExST.Gap
>         elif execState==ExST.Gap:  \
>                   execNextState.next = ExST.Fetch1
>         elif execState==ExST.Broken:  \
>                   execNextState.next = ExST.Broken
>         else:     execNextState.next = ExST.Broken
>
>
> Now I have converted the code using enum to use constants, and
> don't get the improper use of ExST error.

Now I can get on, wrap my code in a test harness, and try it with 
the on-chip RAM block.

Jan Coombs.