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lib.io: allow Pin(xdr=0), representing a combinatorial I/O buffer.

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This commit is contained in:
whitequark 2019-06-03 03:29:27 +00:00
parent 3327deae92
commit c30617fc05
2 changed files with 49 additions and 9 deletions
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41
nmigen/test/test_lib_io.py
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@ -4,7 +4,7 @@ from ..hdl.rec import *
from ..lib.io import *
class PinLayoutSDRTestCase(FHDLTestCase):
class PinLayoutCombTestCase(FHDLTestCase):
def test_pin_layout_i(self):
layout_1 = pin_layout(1, dir="i")
self.assertEqual(layout_1.fields, {
@ -43,6 +43,45 @@ class PinLayoutSDRTestCase(FHDLTestCase):
})
class PinLayoutSDRTestCase(FHDLTestCase):
def test_pin_layout_i(self):
layout_1 = pin_layout(1, dir="i", xdr=1)
self.assertEqual(layout_1.fields, {
"i": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="i", xdr=1)
self.assertEqual(layout_2.fields, {
"i": ((2, False), DIR_NONE),
})
def test_pin_layout_o(self):
layout_1 = pin_layout(1, dir="o", xdr=1)
self.assertEqual(layout_1.fields, {
"o": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="o", xdr=1)
self.assertEqual(layout_2.fields, {
"o": ((2, False), DIR_NONE),
})
def test_pin_layout_io(self):
layout_1 = pin_layout(1, dir="io", xdr=1)
self.assertEqual(layout_1.fields, {
"i": ((1, False), DIR_NONE),
"o": ((1, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
layout_2 = pin_layout(2, dir="io", xdr=1)
self.assertEqual(layout_2.fields, {
"i": ((2, False), DIR_NONE),
"o": ((2, False), DIR_NONE),
"oe": ((1, False), DIR_NONE),
})
class PinLayoutDDRTestCase(FHDLTestCase):
def test_pin_layout_i(self):
layout_1 = pin_layout(1, dir="i", xdr=2)