from collections import OrderedDict from ..build.dsl import * from .utils import * class PinsTestCase(FHDLTestCase): def test_basic(self): p = Pins("A0 A1 A2") self.assertEqual(repr(p), "(pins io A0 A1 A2)") self.assertEqual(len(p.names), 3) self.assertEqual(p.dir, "io") self.assertEqual(p.invert, False) self.assertEqual(list(p), ["A0", "A1", "A2"]) def test_invert(self): p = PinsN("A0") self.assertEqual(repr(p), "(pins-n io A0)") self.assertEqual(p.invert, True) def test_invert_arg(self): p = Pins("A0", invert=True) self.assertEqual(p.invert, True) def test_conn(self): p = Pins("0 1 2", conn=("pmod", 0)) self.assertEqual(list(p), ["pmod_0:0", "pmod_0:1", "pmod_0:2"]) p = Pins("0 1 2", conn=("pmod", "a")) self.assertEqual(list(p), ["pmod_a:0", "pmod_a:1", "pmod_a:2"]) def test_map_names(self): p = Pins("0 1 2", conn=("pmod", 0)) mapping = { "pmod_0:0": "A0", "pmod_0:1": "A1", "pmod_0:2": "A2", } self.assertEqual(p.map_names(mapping, p), ["A0", "A1", "A2"]) def test_map_names_recur(self): p = Pins("0", conn=("pmod", 0)) mapping = { "pmod_0:0": "ext_0:1", "ext_0:1": "A1", } self.assertEqual(p.map_names(mapping, p), ["A1"]) def test_wrong_names(self): with self.assertRaises(TypeError, msg="Names must be a whitespace-separated string, not ['A0', 'A1', 'A2']"): p = Pins(["A0", "A1", "A2"]) def test_wrong_dir(self): with self.assertRaises(TypeError, msg="Direction must be one of \"i\", \"o\", \"oe\", or \"io\", not 'wrong'"): p = Pins("A0 A1", dir="wrong") def test_wrong_conn(self): with self.assertRaises(TypeError, msg="Connector must be None or a pair of string (connector name) and " "integer/string (connector number), not ('foo', None)"): p = Pins("A0 A1", conn=("foo", None)) def test_wrong_map_names(self): p = Pins("0 1 2", conn=("pmod", 0)) mapping = { "pmod_0:0": "A0", } with self.assertRaises(NameError, msg="Resource (pins io pmod_0:0 pmod_0:1 pmod_0:2) refers to nonexistent " "connector pin pmod_0:1"): p.map_names(mapping, p) def test_wrong_assert_width(self): with self.assertRaises(AssertionError, msg="3 names are specified (0 1 2), but 4 names are expected"): Pins("0 1 2", assert_width=4) class DiffPairsTestCase(FHDLTestCase): def test_basic(self): dp = DiffPairs(p="A0 A1", n="B0 B1") self.assertEqual(repr(dp), "(diffpairs io (p A0 A1) (n B0 B1))") self.assertEqual(dp.p.names, ["A0", "A1"]) self.assertEqual(dp.n.names, ["B0", "B1"]) self.assertEqual(dp.dir, "io") self.assertEqual(list(dp), [("A0", "B0"), ("A1", "B1")]) def test_invert(self): dp = DiffPairsN(p="A0", n="B0") self.assertEqual(repr(dp), "(diffpairs-n io (p A0) (n B0))") self.assertEqual(dp.p.names, ["A0"]) self.assertEqual(dp.n.names, ["B0"]) self.assertEqual(dp.invert, True) def test_conn(self): dp = DiffPairs(p="0 1 2", n="3 4 5", conn=("pmod", 0)) self.assertEqual(list(dp), [ ("pmod_0:0", "pmod_0:3"), ("pmod_0:1", "pmod_0:4"), ("pmod_0:2", "pmod_0:5"), ]) def test_dir(self): dp = DiffPairs("A0", "B0", dir="o") self.assertEqual(dp.dir, "o") self.assertEqual(dp.p.dir, "o") self.assertEqual(dp.n.dir, "o") def test_wrong_width(self): with self.assertRaises(TypeError, msg="Positive and negative pins must have the same width, but (pins io A0) " "and (pins io B0 B1) do not"): dp = DiffPairs("A0", "B0 B1") def test_wrong_assert_width(self): with self.assertRaises(AssertionError, msg="3 names are specified (0 1 2), but 4 names are expected"): DiffPairs("0 1 2", "3 4 5", assert_width=4) class AttrsTestCase(FHDLTestCase): def test_basic(self): a = Attrs(IO_STANDARD="LVCMOS33", PULLUP=1) self.assertEqual(a["IO_STANDARD"], "LVCMOS33") self.assertEqual(repr(a), "(attrs IO_STANDARD='LVCMOS33' PULLUP=1)") def test_remove(self): a = Attrs(FOO=None) self.assertEqual(a["FOO"], None) self.assertEqual(repr(a), "(attrs !FOO)") def test_callable(self): fn = lambda self: "FOO" a = Attrs(FOO=fn) self.assertEqual(a["FOO"], fn) self.assertEqual(repr(a), "(attrs FOO={!r})".format(fn)) def test_wrong_value(self): with self.assertRaises(TypeError, msg="Value of attribute FOO must be None, int, str, or callable, not 1.0"): a = Attrs(FOO=1.0) class ClockTestCase(FHDLTestCase): def test_basic(self): c = Clock(1_000_000) self.assertEqual(c.frequency, 1e6) self.assertEqual(c.period, 1e-6) self.assertEqual(repr(c), "(clock 1000000.0)") class SubsignalTestCase(FHDLTestCase): def test_basic_pins(self): s = Subsignal("a", Pins("A0"), Attrs(IOSTANDARD="LVCMOS33")) self.assertEqual(repr(s), "(subsignal a (pins io A0) (attrs IOSTANDARD='LVCMOS33'))") def test_basic_diffpairs(self): s = Subsignal("a", DiffPairs("A0", "B0")) self.assertEqual(repr(s), "(subsignal a (diffpairs io (p A0) (n B0)))") def test_basic_subsignals(self): s = Subsignal("a", Subsignal("b", Pins("A0")), Subsignal("c", Pins("A1"))) self.assertEqual(repr(s), "(subsignal a (subsignal b (pins io A0)) " "(subsignal c (pins io A1)))") def test_attrs(self): s = Subsignal("a", Subsignal("b", Pins("A0")), Subsignal("c", Pins("A0"), Attrs(SLEW="FAST")), Attrs(IOSTANDARD="LVCMOS33")) self.assertEqual(s.attrs, {"IOSTANDARD": "LVCMOS33"}) self.assertEqual(s.ios[0].attrs, {}) self.assertEqual(s.ios[1].attrs, {"SLEW": "FAST"}) def test_attrs_many(self): s = Subsignal("a", Pins("A0"), Attrs(SLEW="FAST"), Attrs(PULLUP="1")) self.assertEqual(s.attrs, {"SLEW": "FAST", "PULLUP": "1"}) def test_clock(self): s = Subsignal("a", Pins("A0"), Clock(1e6)) self.assertEqual(s.clock.frequency, 1e6) def test_wrong_empty_io(self): with self.assertRaises(ValueError, msg="Missing I/O constraints"): s = Subsignal("a") def test_wrong_io(self): with self.assertRaises(TypeError, msg="Constraint must be one of Pins, DiffPairs, Subsignal, Attrs, or Clock, " "not 'wrong'"): s = Subsignal("a", "wrong") def test_wrong_pins(self): with self.assertRaises(TypeError, msg="Pins and DiffPairs are incompatible with other location or subsignal " "constraints, but (pins io A1) appears after (pins io A0)"): s = Subsignal("a", Pins("A0"), Pins("A1")) def test_wrong_diffpairs(self): with self.assertRaises(TypeError, msg="Pins and DiffPairs are incompatible with other location or subsignal " "constraints, but (pins io A1) appears after (diffpairs io (p A0) (n B0))"): s = Subsignal("a", DiffPairs("A0", "B0"), Pins("A1")) def test_wrong_subsignals(self): with self.assertRaises(TypeError, msg="Pins and DiffPairs are incompatible with other location or subsignal " "constraints, but (pins io B0) appears after (subsignal b (pins io A0))"): s = Subsignal("a", Subsignal("b", Pins("A0")), Pins("B0")) def test_wrong_clock(self): with self.assertRaises(TypeError, msg="Clock constraint can only be applied to Pins or DiffPairs, not " "(subsignal b (pins io A0))"): s = Subsignal("a", Subsignal("b", Pins("A0")), Clock(1e6)) def test_wrong_clock_many(self): with self.assertRaises(ValueError, msg="Clock constraint can be applied only once"): s = Subsignal("a", Pins("A0"), Clock(1e6), Clock(1e7)) class ResourceTestCase(FHDLTestCase): def test_basic(self): r = Resource("serial", 0, Subsignal("tx", Pins("A0", dir="o")), Subsignal("rx", Pins("A1", dir="i")), Attrs(IOSTANDARD="LVCMOS33")) self.assertEqual(repr(r), "(resource serial 0" " (subsignal tx (pins o A0))" " (subsignal rx (pins i A1))" " (attrs IOSTANDARD='LVCMOS33'))") def test_family(self): ios = [Subsignal("clk", Pins("A0", dir="o"))] r1 = Resource.family(0, default_name="spi", ios=ios) r2 = Resource.family("spi_flash", 0, default_name="spi", ios=ios) r3 = Resource.family("spi_flash", 0, default_name="spi", ios=ios, name_suffix="4x") r4 = Resource.family(0, default_name="spi", ios=ios, name_suffix="2x") self.assertEqual(r1.name, "spi") self.assertEqual(r1.ios, ios) self.assertEqual(r2.name, "spi_flash") self.assertEqual(r2.ios, ios) self.assertEqual(r3.name, "spi_flash_4x") self.assertEqual(r3.ios, ios) self.assertEqual(r4.name, "spi_2x") self.assertEqual(r4.ios, ios) class ConnectorTestCase(FHDLTestCase): def test_string(self): c = Connector("pmod", 0, "A0 A1 A2 A3 - - A4 A5 A6 A7 - -") self.assertEqual(c.name, "pmod") self.assertEqual(c.number, 0) self.assertEqual(c.mapping, OrderedDict([ ("1", "A0"), ("2", "A1"), ("3", "A2"), ("4", "A3"), ("7", "A4"), ("8", "A5"), ("9", "A6"), ("10", "A7"), ])) self.assertEqual(list(c), [ ("pmod_0:1", "A0"), ("pmod_0:2", "A1"), ("pmod_0:3", "A2"), ("pmod_0:4", "A3"), ("pmod_0:7", "A4"), ("pmod_0:8", "A5"), ("pmod_0:9", "A6"), ("pmod_0:10", "A7"), ]) self.assertEqual(repr(c), "(connector pmod 0 1=>A0 2=>A1 3=>A2 4=>A3 7=>A4 8=>A5 9=>A6 10=>A7)") def test_dict(self): c = Connector("ext", 1, {"DP0": "A0", "DP1": "A1"}) self.assertEqual(c.name, "ext") self.assertEqual(c.number, 1) self.assertEqual(c.mapping, OrderedDict([ ("DP0", "A0"), ("DP1", "A1"), ])) def test_conn(self): c = Connector("pmod", 0, "0 1 2 3 - - 4 5 6 7 - -", conn=("expansion", 0)) self.assertEqual(c.mapping, OrderedDict([ ("1", "expansion_0:0"), ("2", "expansion_0:1"), ("3", "expansion_0:2"), ("4", "expansion_0:3"), ("7", "expansion_0:4"), ("8", "expansion_0:5"), ("9", "expansion_0:6"), ("10", "expansion_0:7"), ])) def test_str_name(self): c = Connector("ext", "A", "0 1 2") self.assertEqual(c.name, "ext") self.assertEqual(c.number, "A") def test_conn_wrong_name(self): with self.assertRaises(TypeError, msg="Connector must be None or a pair of string (connector name) and " "integer/string (connector number), not ('foo', None)"): Connector("ext", "A", "0 1 2", conn=("foo", None)) def test_wrong_io(self): with self.assertRaises(TypeError, msg="Connector I/Os must be a dictionary or a string, not []"): Connector("pmod", 0, []) def test_wrong_dict_key_value(self): with self.assertRaises(TypeError, msg="Connector pin name must be a string, not 0"): Connector("pmod", 0, {0: "A"}) with self.assertRaises(TypeError, msg="Platform pin name must be a string, not 0"): Connector("pmod", 0, {"A": 0})