50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
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# This file is Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
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# License: BSD
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import unittest
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import random
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from migen import *
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from litex.soc.interconnect.stream import *
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class TestStream(unittest.TestCase):
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def pipe_test(self, dut):
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prng = random.Random(42)
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def generator(dut, valid_rand=90):
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for data in range(128):
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yield dut.sink.valid.eq(1)
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yield dut.sink.data.eq(data)
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yield
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while (yield dut.sink.ready) == 0:
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yield
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yield dut.sink.valid.eq(0)
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while prng.randrange(100) < valid_rand:
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yield
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def checker(dut, ready_rand=90):
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dut.errors = 0
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for data in range(128):
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yield dut.source.ready.eq(0)
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yield
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while (yield dut.source.valid) == 0:
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yield
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while prng.randrange(100) < ready_rand:
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yield
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yield dut.source.ready.eq(1)
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yield
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if ((yield dut.source.data) != data):
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dut.errors += 1
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yield
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run_simulation(dut, [generator(dut), checker(dut)])
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self.assertEqual(dut.errors, 0)
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def test_pipe_valid(self):
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dut = PipeValid([("data", 8)])
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self.pipe_test(dut)
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def test_pipe_ready(self):
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dut = PipeReady([("data", 8)])
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self.pipe_test(dut)
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