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hdl.ir: add IOBufferInstance.

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Wanda 2024-02-12 15:11:42 +01:00 • committed by Catherine
parent 85bb5ee77c
commit c6bc9b47ef
4 changed files with 193 additions and 23 deletions
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122
tests/test_hdl_ir.py
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@ -938,4 +938,124 @@ class OriginsTestCase(FHDLTestCase):
del inst.origins
elab = ElaboratesTo(inst)
frag = Fragment.get(elab, platform=None)
self.assertFalse(hasattr(frag, "_origins"))
self.assertFalse(hasattr(frag, "_origins"))
class IOBufferTestCase(FHDLTestCase):
def test_nir_i(self):
pad = Signal(4)
i = Signal(4)
f = Fragment()
f.add_subfragment(IOBufferInstance(pad, i=i))
nl = build_netlist(f, ports=[pad, i])
self.assertRepr(nl, """
(
(module 0 None ('top')
(inout 'pad' 0.2:6)
(output 'i' 1.0:4)
)
(cell 0 0 (top
(output 'i' 1.0:4)
(inout 'pad' 2:6)
))
(cell 1 0 (iob 0.2:6 4'd0 0))
)
""")
def test_nir_o(self):
pad = Signal(4)
o = Signal(4)
f = Fragment()
f.add_subfragment(IOBufferInstance(pad, o=o))
nl = build_netlist(f, ports=[pad, o])
self.assertRepr(nl, """
(
(module 0 None ('top')
(input 'o' 0.6:10)
(inout 'pad' 0.2:6)
)
(cell 0 0 (top
(input 'o' 6:10)
(inout 'pad' 2:6)
))
(cell 1 0 (iob 0.2:6 0.6:10 1))
)
""")
def test_nir_oe(self):
pad = Signal(4)
o = Signal(4)
oe = Signal()
f = Fragment()
f.add_subfragment(IOBufferInstance(pad, o=o, oe=oe))
nl = build_netlist(f, ports=[pad, o, oe])
self.assertRepr(nl, """
(
(module 0 None ('top')
(input 'o' 0.6:10)
(input 'oe' 0.10)
(inout 'pad' 0.2:6)
)
(cell 0 0 (top
(input 'o' 6:10)
(input 'oe' 10:11)
(inout 'pad' 2:6)
))
(cell 1 0 (iob 0.2:6 0.6:10 0.10))
)
""")
def test_nir_io(self):
pad = Signal(4)
i = Signal(4)
o = Signal(4)
oe = Signal()
f = Fragment()
f.add_subfragment(IOBufferInstance(pad, i=i, o=o, oe=oe))
nl = build_netlist(f, ports=[pad, i, o, oe])
self.assertRepr(nl, """
(
(module 0 None ('top')
(input 'o' 0.6:10)
(input 'oe' 0.10)
(inout 'pad' 0.2:6)
(output 'i' 1.0:4)
)
(cell 0 0 (top
(output 'i' 1.0:4)
(input 'o' 6:10)
(input 'oe' 10:11)
(inout 'pad' 2:6)
))
(cell 1 0 (iob 0.2:6 0.6:10 0.10))
)
""")
def test_wrong_i(self):
pad = Signal(4)
i = Signal()
with self.assertRaisesRegex(ValueError,
r"^`pad` length \(4\) doesn't match `i` length \(1\)"):
IOBufferInstance(pad, i=i)
def test_wrong_o(self):
pad = Signal(4)
o = Signal()
with self.assertRaisesRegex(ValueError,
r"^`pad` length \(4\) doesn't match `o` length \(1\)"):
IOBufferInstance(pad, o=o)
def test_wrong_oe(self):
pad = Signal(4)
o = Signal(4)
oe = Signal(4)
with self.assertRaisesRegex(ValueError,
r"^`oe` length \(4\) must be 1"):
IOBufferInstance(pad, o=o, oe=oe)
def test_wrong_oe_without_o(self):
pad = Signal(4)
oe = Signal()
with self.assertRaisesRegex(ValueError,
r"^`oe` must not be used if `o` is not used"):
IOBufferInstance(pad, oe=oe)