nmigen/test/test_hdl_cd.py

   1 from ..hdl.cd import *
   2 from .tools import *
   3
   4
   5 class ClockDomainTestCase(FHDLTestCase):
   6     def test_name(self):
   7         sync = ClockDomain()
   8         self.assertEqual(sync.name, "sync")
   9         self.assertEqual(sync.clk.name, "clk")
  10         self.assertEqual(sync.rst.name, "rst")
  11         pix = ClockDomain()
  12         self.assertEqual(pix.name, "pix")
  13         self.assertEqual(pix.clk.name, "pix_clk")
  14         self.assertEqual(pix.rst.name, "pix_rst")
  15         cd_pix = ClockDomain()
  16         self.assertEqual(pix.name, "pix")
  17         dom = [ClockDomain("foo")][0]
  18         self.assertEqual(dom.name, "foo")
  19         with self.assertRaises(ValueError,
  20                 msg="Clock domain name must be specified explicitly"):
  21             ClockDomain()
  22
  23     def test_with_reset(self):
  24         pix = ClockDomain()
  25         self.assertIsNotNone(pix.clk)
  26         self.assertIsNotNone(pix.rst)
  27         self.assertFalse(pix.async_reset)
  28
  29     def test_without_reset(self):
  30         pix = ClockDomain(reset_less=True)
  31         self.assertIsNotNone(pix.clk)
  32         self.assertIsNone(pix.rst)
  33         self.assertFalse(pix.async_reset)
  34
  35     def test_async_reset(self):
  36         pix = ClockDomain(async_reset=True)
  37         self.assertIsNotNone(pix.clk)
  38         self.assertIsNotNone(pix.rst)
  39         self.assertTrue(pix.async_reset)
  40
  41     def test_rename(self):
  42         sync = ClockDomain()
  43         self.assertEqual(sync.name, "sync")
  44         self.assertEqual(sync.clk.name, "clk")
  45         self.assertEqual(sync.rst.name, "rst")
  46         sync.rename("pix")
  47         self.assertEqual(sync.name, "pix")
  48         self.assertEqual(sync.clk.name, "pix_clk")
  49         self.assertEqual(sync.rst.name, "pix_rst")
  50
  51     def test_rename_reset_less(self):
  52         sync = ClockDomain(reset_less=True)
  53         self.assertEqual(sync.name, "sync")
  54         self.assertEqual(sync.clk.name, "clk")
  55         sync.rename("pix")
  56         self.assertEqual(sync.name, "pix")
  57         self.assertEqual(sync.clk.name, "pix_clk")