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add default features over-ride option to wishbone
author
Luke Kenneth Casson Leighton
<lkcl@lkcl.net>
Fri, 9 Oct 2020 12:38:43 +0000
(13:38 +0100)
committer
Luke Kenneth Casson Leighton
<lkcl@lkcl.net>
Fri, 9 Oct 2020 12:38:43 +0000
(13:38 +0100)
c4m/nmigen/jtag/tap.py
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diff --git
a/c4m/nmigen/jtag/tap.py
b/c4m/nmigen/jtag/tap.py
index 8beb7ed6c85ab6124af513f262e4ad8e32a6f0e7..638cee65aca634ffb2e3a15be3d3d087e1aa2d5b 100755
(executable)
--- a/
c4m/nmigen/jtag/tap.py
+++ b/
c4m/nmigen/jtag/tap.py
@@
-600,7
+600,7
@@
class TAP(Elaboratable):
def add_wishbone(self, *, ircodes, address_width, data_width,
def add_wishbone(self, *, ircodes, address_width, data_width,
- granularity=None, domain="sync",
+ granularity=None, domain="sync",
features=None,
name=None, src_loc_at=0):
"""Add a wishbone interface
name=None, src_loc_at=0):
"""Add a wishbone interface
@@
-616,6
+616,7
@@
class TAP(Elaboratable):
share a shift register of length data_width.
address_width: width of the address
data_width: width of the data
share a shift register of length data_width.
address_width: width of the address
data_width: width of the data
+ features: features required. defaults to stall, lock, err, rty
Returns:
wb: nmigen_soc.wishbone.bus.Interface
Returns:
wb: nmigen_soc.wishbone.bus.Interface
@@
-624,6
+625,8
@@
class TAP(Elaboratable):
if len(ircodes) != 3:
raise ValueError("3 IR Codes have to be provided")
if len(ircodes) != 3:
raise ValueError("3 IR Codes have to be provided")
+ if features is None:
+ features={"stall", "lock", "err", "rty"}
if name is None:
name = "wb" + str(len(self._wbs))
sr_addr = self.add_shiftreg(
if name is None:
name = "wb" + str(len(self._wbs))
sr_addr = self.add_shiftreg(
@@
-636,8
+639,7
@@
class TAP(Elaboratable):
)
wb = WishboneInterface(data_width=data_width, addr_width=address_width,
)
wb = WishboneInterface(data_width=data_width, addr_width=address_width,
- granularity=granularity,
- features={"stall", "lock", "err", "rty"},
+ granularity=granularity, features=features,
name=name, src_loc_at=src_loc_at+1)
self._wbs.append((sr_addr, sr_data, wb, domain))
name=name, src_loc_at=src_loc_at+1)
self._wbs.append((sr_addr, sr_data, wb, domain))