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build.res: allow querying frequency of a previously constrained clock.

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This commit is contained in:
whitequark 2019-06-05 12:51:53 +00:00
parent c9879c795b
commit b45c5119f5
2 changed files with 27 additions and 6 deletions
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12
nmigen/test/test_build_res.py
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@ -168,6 +168,12 @@ class ResourceManagerTestCase(FHDLTestCase):
(scl_port, 100e3)
])
def test_get_clock(self):
clk100 = self.cm.request("clk100", 0)
self.assertEqual(self.cm.get_clock_constraint(clk100), 100e6)
with self.assertRaises(KeyError):
self.cm.get_clock_constraint(Signal())
def test_wrong_resources(self):
with self.assertRaises(TypeError, msg="Object 'wrong' is not a Resource"):
self.cm.add_resources(['wrong'])
@ -203,6 +209,12 @@ class ResourceManagerTestCase(FHDLTestCase):
msg="Frequency must be a number, not None"):
self.cm.add_clock_constraint(Signal(), None)
def test_wrong_clock_pin(self):
with self.assertRaises(ValueError,
msg="The Pin object (rec <unnamed> i), which is not a previously requested "
"resource, cannot be used to desigate a clock"):
self.cm.add_clock_constraint(Pin(1, dir="i"), 1e6)
def test_wrong_request_duplicate(self):
with self.assertRaises(ResourceError,
msg="Resource user_led#0 has already been requested"):