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

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

This error message points to a blank line, which is always 
immediately before the start of a code block:

myhdl.ConversionError: File 
/home/jan/work/projects/MyHDL/SDP_3o4/work/sdp3o4.py, line 123: 
Object type is not supported in this context: ExST

Does it refer to the next or previous block of code?

I assumed that it would be the previous block of code, and 
commented out all lines referring to the state constants, but the 
error remains the same, even the line number.

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.  The simulation still 
looks ok, but I now get this:

jan@T60:~/work/projects/MyHDL/SDP_3o4/work$ ./testSdp3o4.py
<class 'myhdl._SuspendSimulation'>: Simulated 350 timesteps
Traceback (most recent call last):
   File "./testSdp3o4.py", line 46, in <module>
     toVerilog(sdp3o4, clk,reset, addr, doSim)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 151, in __call__
     _convertGens(genlist, vfile)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 374, in _convertGens
     v.visit(tree)
   File "/usr/lib/python2.7/ast.py", line 241, in visit
     return visitor(node)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 964, in visit_Module
     self.visit(stmt)
   File "/usr/lib/python2.7/ast.py", line 241, in visit
     return visitor(node)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 1285, in visit_FunctionDef
     self.visit_stmt(node.body)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 1141, in visit_stmt
     self.visit(stmt)
   File "/usr/lib/python2.7/ast.py", line 241, in visit
     return visitor(node)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 667, in visit_Assign
     self.visit(node.value)
   File "/usr/lib/python2.7/ast.py", line 241, in visit
     return visitor(node)
   File 
"/home/jan/work/projects/MyHDL/myhdl/myhdl/conversion/_toVerilog.py", 
line 743, in visit_Call
     self.write(f.__name__)
   File "/home/jan/work/projects/MyHDL/myhdl/myhdl/_Signal.py", 
line 479, in __getattr__
     return getattr(self._val, attr)
AttributeError: 'intbv' object has no attribute '__name__'
jan@T60:~/work/projects/MyHDL/SDP_3o4/work$


I did start looking at the MyHDL source, but suspect that this 
would be a very long route to a solution.  My code is only three 
pages, should I try to convert smaller pieces?  Or can anyone else 
suggest the type of problems/typos I should look for?

Jan Coombs
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