import sys import datetime from miscope.tools.misc import * def get_bits(values, width, low, high=None): r = [] for val in values: t = dec2bin(val, width)[::-1] if high == None: t = t[low] else: t = t[low:high] t = t[::1] t = int(t,2) r.append(t) return r class VcdDat(list): def __init__(self, width): self.width = width def __getitem__(self, key): if isinstance(key, int): return get_bits(self, self.width, key) elif isinstance(key, slice): if key.start != None: start = key.start else: start = 0 if key.stop != None: stop = key.stop else: stop = self.width if stop > self.width: stop = self.width if key.step != None: raise KeyError return get_bits(self, self.width, start, stop) else: raise KeyError def decode_rle(self): rle_bit = self[-1] rle_dat = self[:self.width-1] dat = VcdDat(self.width) i=0 last = 0 for d in self: if rle_bit[i]: if len(dat) >= 1: # FIX ME... why is rle_dat in reverse orderd... for j in range(int(dec2bin(rle_dat[i])[::-1],2)): dat.append(last) else: dat.append(d) last = d i +=1 return dat class Var: def __init__(self, name, width, values=[], type="wire", default="x"): self.type = type self.width = width self.name = name self.val = default self.values = values self.vcd_id = None def set_vcd_id(self, s): self.vcd_id = s def __len__(self): return len(self.values) def change(self, cnt): r = "" try : if self.values[cnt+1] != self.val: r += "b" r += dec2bin(self.values[cnt+1], self.width)[::-1] r += " " r += self.vcd_id r += "\n" return r except : return r return r class Vcd: def __init__(self, timescale="1ps", comment=""): self.timescale = timescale self.comment = comment self.vars = [] self.vcd_id = "!" self.cnt = -1 def add(self, var): var.set_vcd_id(self.vcd_id) self.vcd_id = chr(ord(self.vcd_id)+1) self.vars.append(var) def add_from_layout(self, layout, var): i=0 for s, n in layout: self.add(Var(s, n, var[i:i+n])) i += n def __len__(self): l = 0 for var in self.vars: l = max(len(var),l) return l def change(self): r = "" c = "" for var in self.vars: c += var.change(self.cnt) if c != "": r += "#" r += str(self.cnt+1) r += "\n" r += c return r def p_date(self): now = datetime.datetime.now() r = "$date\n" r += "\t" r += now.strftime("%Y-%m-%d %H:%M") r += "\n" r += "$end\n" return r def p_version(self): r = "$version\n" r += "\tmiscope VCD dump\n" r += "$end\n" return r def p_comment(self): r = "$comment\n" r += self.comment r += "\n$end\n" return r def p_timescale(self): r = "$timescale " r += self.timescale r += " $end\n" return r def p_scope(self): r = "$scope " r += self.timescale r += " $end\n" return r def p_vars(self): r = "" for var in self.vars: r += "$var " r += var.type r += " " r += str(var.width) r += " " r += var.vcd_id r += " " r += var.name r += " $end\n" return r def p_unscope(self): r = "$unscope " r += " $end\n" return r def p_enddefinitions(self): r = "$enddefinitions " r += " $end\n" return r def p_dumpvars(self): r = "$dumpvars\n" for var in self.vars: r += "b" r += dec2bin(var.val, var.width) r += " " r += var.vcd_id r+= "\n" r += "$end\n" return r def p_valuechange(self): r = "" for i in range(len(self)): r += self.change() self.cnt += 1 return r def __repr__(self): r = "" r += self.p_date() r += self.p_version() r += self.p_comment() r += self.p_timescale() r += self.p_scope() r += self.p_vars() r += self.p_unscope() r += self.p_enddefinitions() r += self.p_dumpvars() r += self.p_valuechange() return r def write(self, filename): f = open(filename, "w") f.write(str(self)) f.close() def main(): myvcd = Vcd() myvcd.add(Var(1, "foo1", [0,1,0,1,0,1])) myvcd.add(Var(2, "foo2", [1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0])) myvcd.add(Var(3, "foo3")) myvcd.add(Var(4, "foo4")) ramp = [i%128 for i in range(1024)] myvcd.add(Var(16, "ramp", ramp)) print(myvcd) if __name__ == '__main__': main()