import subprocess from migen.fhdl.std import * from lib.sata.std import * from lib.sata.link.scrambler import * from lib.sata.link.test.common import check class TB(Module): def __init__(self, length): self.submodules.scrambler = Scrambler() self.length = length def gen_simulation(self, selfp): # init CRC selfp.scrambler.ce = 1 selfp.scrambler.reset = 1 yield selfp.scrambler.reset = 0 # get C code results p = subprocess.Popen(["./scrambler"], stdout=subprocess.PIPE) out, err = p.communicate() ref = [int(e, 16) for e in out.decode("utf-8").split("\n")[:-1]] # log results yield res = [] for i in range(self.length): res.append(selfp.scrambler.value) yield # check results s, l, e = check(ref, res) print("shift "+ str(s) + " / length " + str(l) + " / errors " + str(e)) if __name__ == "__main__": from migen.sim.generic import run_simulation length = 8192 run_simulation(TB(length), ncycles=length+100, vcd_name="my.vcd", keep_files=True)