tb: add chansync

diff --git a/tb/dvisampler/chansync.py b/tb/dvisampler/chansync.py
new file mode 100644 (file)
index 0000000..549ffe0
--- /dev/null
+++ b/tb/dvisampler/chansync.py
@@ -0,0 +1,48 @@
+from migen.fhdl.structure import *
+from migen.fhdl.module import Module
+from migen.sim.generic import *
+
+from milkymist.dvisampler.chansync import ChanSync
+
+class TB(Module):
+       def __init__(self, test_seq_it):
+               self.test_seq_it = test_seq_it
+
+               self.chansync = ChanSync()
+               self.add_submodule(self.chansync, {"pix": "sys"})
+               self.comb += self.chansync.valid_i.eq(1)
+
+       def do_simulation(self, s):
+               try:
+                       de0, de1, de2 = next(self.test_seq_it)
+               except StopIteration:
+                       s.interrupt = True
+                       return
+
+               s.wr(self.chansync.data_in0.de, de0)
+               s.wr(self.chansync.data_in1.de, de1)
+               s.wr(self.chansync.data_in2.de, de2)
+               s.wr(self.chansync.data_in0.d, s.cycle_counter)
+               s.wr(self.chansync.data_in1.d, s.cycle_counter)
+               s.wr(self.chansync.data_in2.d, s.cycle_counter)
+
+               out0 = s.rd(self.chansync.data_out0.d)
+               out1 = s.rd(self.chansync.data_out1.d)
+               out2 = s.rd(self.chansync.data_out2.d)
+
+               print("{0:5} {1:5} {2:5}".format(out0, out1, out2))
+
+def main():
+       test_seq = [
+               (1, 1, 1),
+               (1, 1, 0),
+               (0, 0, 0),
+               (0, 0, 0),
+               (0, 0, 1),
+               (1, 1, 1),
+               (1, 1, 1),
+       ]
+       tb = TB(iter(test_seq*2))
+       Simulator(tb).run()
+
+main()