error handling

myhdl/_Cosimulation.py

@@ -30,18 +30,19 @@ import exceptions
 
 from myhdl._intbv import intbv
 from myhdl import _simulator
+from myhdl._Error import Error
 
 _MAXLINE = 4096
 
-class Error(Exception):
-    """Cosimulation Error"""
-    def __init__(self, arg=""):
-        self.arg = arg
-    def __str__(self):
-        msg = self.__doc__
-        if self.arg:
-            msg = msg + ": " + str(self.arg)
-        return msg
+## class Error(Exception):
+##     """Cosimulation Error"""
+##     def __init__(self, arg=""):
+##         self.arg = arg
+##     def __str__(self):
+##         msg = self.__doc__
+##         if self.arg:
+##             msg = msg + ": " + str(self.arg)
+##         return msg
 
 class MultipleCosimError(Error):
     """Only a single cosimulator allowed"""

myhdl/_Simulation.py

@@ -34,20 +34,11 @@ from myhdl import _simulator
 from myhdl._simulator import _siglist, _futureEvents
 from myhdl._Waiter import _Waiter, _WaiterList
 from myhdl._util import StopSimulation, SuspendSimulation
+from myhdl._Error import Error
 
 
 schedule = _futureEvents.append
 
-class Error(Exception):
-    """Simulation Error"""
-    def __init__(self, arg=""):
-        self.arg = arg
-    def __str__(self):
-        msg = self.__doc__
-        if self.arg:
-            msg = msg + ": " + str(self.arg)
-        return msg
-
 class MultipleCosimError(Error):
     """Only a single cosimulator argument allowed"""
 class ArgTypeError(Error):

myhdl/_always_comb.py

@@ -33,16 +33,7 @@ from sets import Set
 
 from myhdl import Signal
 from myhdl._util import _isGenFunc
-
-class Error(Exception):
-    """always_comb Error"""
-    def __init__(self, arg=""):
-        self.arg = arg
-    def __str__(self):
-        msg = self.__doc__
-        if self.arg:
-            msg = msg + ": " + str(self.arg)
-        return msg
+from myhdl._Error import Error
 
 class ArgumentError(Error):
     """ always_comb argument should be a classic function"""

myhdl/_extractHierarchy.py

@@ -39,19 +39,10 @@ from sets import Set
 
 from myhdl import Signal
 from myhdl._util import _isGenSeq, _isGenFunc
+from myhdl._Error import Error
 
 
 _profileFunc = None
-
-class Error(Exception):
-    """ traceSignals Error"""
-    def __init__(self, arg=""):
-        self.arg = arg
-    def __str__(self):
-        msg = self.__doc__
-        if self.arg:
-            msg = msg + ": " + str(self.arg)
-        return msg
     
 class NoInstancesError(Error):
     """No instances found"""

myhdl/_toVerilog.py

@@ -35,6 +35,7 @@ from cStringIO import StringIO
 
 from myhdl import Signal, intbv
 from myhdl._extractHierarchy import _HierExtr, _findInstanceName
+from myhdl._Error import Error
 
 
 def _flatten(*args):
@@ -52,16 +53,6 @@ def _flatten(*args):
 _converting = 0
 _profileFunc = None
 
-class Error(Exception):
-    """ toVerilog Error"""
-    def __init__(self, arg=""):
-        self.arg = arg
-    def __str__(self):
-        if self.__doc__ and self.arg:
-            msg = self.__doc__ + ": " + str(self.arg)
-        else:
-            msg = self.__doc__ or self.arg
-        return msg
 
 class TopLevelNameError(Error):
     """result of toVerilog call should be assigned to a top level name"""
@@ -79,6 +70,7 @@ class UndrivenSignalError(Error):
     """Signal is not driven"""
 
 
+
 def toVerilog(func, *args, **kwargs):
     global _converting
     if _converting:
@@ -163,6 +155,7 @@ def _analyzeGens(top, gennames):
         gen.lineoffset = inspect.getsourcelines(f)[1]-1
         symdict = f.f_globals.copy()
         symdict.update(f.f_locals)
+        print f.f_locals
         sigdict = {}
         for n, v in symdict.items():
             if isinstance(v, Signal):
@@ -318,7 +311,6 @@ class _AnalyzeGenVisitor(_ToVerilogBaseVisitor):
     def visitAssign(self, node, access=OUTPUT):
         for n in node.nodes:
             self.visit(n, OUTPUT)
-        print node.expr
         self.visit(node.expr, INPUT)
 
 

myhdl/_traceSignals.py

@@ -35,19 +35,11 @@ from sets import Set
 from myhdl import _simulator, Signal, __version__
 from myhdl._util import _isGenSeq, _isGenFunc
 from myhdl._extractHierarchy import _findInstanceName, _HierExtr
+from myhdl._Error import Error
 
 _tracing = 0
 _profileFunc = None
 
-class Error(Exception):
-    """ traceSignals Error"""
-    def __init__(self, arg=""):
-        self.arg = arg
-    def __str__(self):
-        msg = self.__doc__
-        if self.arg:
-            msg = msg + ": " + str(self.arg)
-        return msg
 
 class TopLevelNameError(Error):
     """result of traceSignals call should be assigned to a top level name"""

myhdl/_util.py

@@ -21,7 +21,6 @@
 
 This module provides the following myhdl objects:
 downrange -- function that returns a downward range
-Error -- myhdl Error exception
 bin -- returns a binary string representation.
        The optional width specifies the desired string
        width: padding of the sign-bit is used.

myhdl/test/test_traceSignals.py

@@ -120,7 +120,6 @@ class TestTraceSigs(TestCase):
         else:
             self.fail()
 
-
     def testReturnVal(self):
         try:
             dut = traceSignals(dummy)

myhdl/test/toVerilog/test_bin2gray.py

@@ -14,8 +14,9 @@ def bin2gray(B, G, width):
     """
     while 1:
         yield B
+        # a = 3
         for i in range(width):
-            G.next[i] = B[i] ^ B[i]
+            G.next[i] = B[i+1] ^ B[i]
             
             
 analyze_cmd = "iverilog -o bin2gray bin2gray_1.v tb_bin2gray_1.v"