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build.dsl: Add optional name_suffix to Resource.family.

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William D. Jones 2019-07-10 11:29:09 -04:00 committed by whitequark
parent 278b624c66
commit 6ee760e83f
2 changed files with 14 additions and 3 deletions
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11
nmigen/build/dsl.py
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@ -182,7 +182,7 @@ class Subsignal:
class Resource(Subsignal):
@classmethod
def family(cls, name_or_number, number=None, *, ios, default_name):
def family(cls, name_or_number, number=None, *, ios, default_name, name_suffix=""):
# This constructor accepts two different forms:
# 1. Number-only form:
# Resource.family(0, default_name="name", ios=[Pins("A0 A1")])
@ -190,10 +190,15 @@ class Resource(Subsignal):
# Resource.family("override", 0, default_name="name", ios=...)
# This makes it easier to build abstractions for resources, e.g. an SPIResource abstraction
# could simply delegate to `Resource.family(*args, default_name="spi", ios=ios)`.
# The name_suffix argument is meant to support creating resources with
# similar names, such as spi_flash, spi_flash_2x, etc.
if name_suffix: # Only add "_" if we actually have a suffix.
name_suffix = "_" + name_suffix
if number is None: # name_or_number is number
return cls(default_name, name_or_number, *ios)
return cls(default_name + name_suffix, name_or_number, *ios)
else: # name_or_number is name
return cls(name_or_number, number, *ios)
return cls(name_or_number + name_suffix, number, *ios)
def __init__(self, name, number, *args):
super().__init__(name, *args)

6
nmigen/test/test_build_dsl.py
View file

@ -229,10 +229,16 @@ class ResourceTestCase(FHDLTestCase):
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):