From: Sebastien Bourdeauducq Date: Fri, 15 Mar 2013 17:46:11 +0000 (+0100) Subject: New clock_domain API X-Git-Tag: 24jan2021_ls180~2099^2~443^2~51 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6feb6e60b065aa28b06b6b22325e3426cf7a9e1a;p=litex.git New clock_domain API --- diff --git a/mibuild/altera_quartus.py b/mibuild/altera_quartus.py index c73d2474..f1d366df 100644 --- a/mibuild/altera_quartus.py +++ b/mibuild/altera_quartus.py @@ -72,12 +72,12 @@ quartus_sta {build_name}.qpf raise OSError("Subprocess failed") class AlteraQuartusPlatform(GenericPlatform): - def build(self, fragment, clock_domains=None, build_dir="build", build_name="top", + def build(self, fragment, build_dir="build", build_name="top", quartus_path="/opt/Altera", run=True): tools.mkdir_noerror(build_dir) os.chdir(build_dir) - v_src, named_sc, named_pc = self.get_verilog(fragment, clock_domains) + v_src, named_sc, named_pc = self.get_verilog(fragment) v_file = build_name + ".v" tools.write_to_file(v_file, v_src) sources = self.sources + [(v_file, "verilog")] diff --git a/mibuild/crg.py b/mibuild/crg.py index 131b7e62..5d8510dd 100644 --- a/mibuild/crg.py +++ b/mibuild/crg.py @@ -1,20 +1,12 @@ from migen.fhdl.structure import * from migen.fhdl.module import Module -class CRG(Module): - def get_clock_domains(self): - r = dict() - for k, v in self.__dict__.items(): - if isinstance(v, ClockDomain): - r[v.name] = v - return r - -class SimpleCRG(CRG): +class SimpleCRG(Module): def __init__(self, platform, clk_name, rst_name, rst_invert=False): - self.cd = ClockDomain("sys") - platform.request(clk_name, None, self.cd.clk) + self.clock_domains.cd_sys = ClockDomain() + platform.request(clk_name, None, self.cd_sys.clk) if rst_invert: rst_n = platform.request(rst_name) - self.comb += self.cd.rst.eq(~rst_n) + self.comb += self.cd_sys.rst.eq(~rst_n) else: - platform.request(rst_name, None, self.cd.rst) + platform.request(rst_name, None, self.cd_sys.rst) diff --git a/mibuild/generic_platform.py b/mibuild/generic_platform.py index 89360bc4..d3fe50b2 100644 --- a/mibuild/generic_platform.py +++ b/mibuild/generic_platform.py @@ -197,7 +197,7 @@ class GenericPlatform: if language is not None: self.add_source(os.path.join(root, filename), language) - def get_verilog(self, fragment, clock_domains=None, **kwargs): + def get_verilog(self, fragment, **kwargs): if not isinstance(fragment, Fragment): fragment = fragment.get_fragment() # We may create a temporary clock/reset generator that would request pins. @@ -206,17 +206,15 @@ class GenericPlatform: backup = self.constraint_manager.save() try: # if none exists, create a default clock domain and drive it - if clock_domains is None: + if not fragment.clock_domains: if self.default_crg_factory is None: raise NotImplementedError("No clock/reset generator defined by either platform or user") crg = self.default_crg_factory(self) frag = fragment + crg.get_fragment() - clock_domains = crg.get_clock_domains() else: frag = fragment # generate Verilog - src, vns = verilog.convert(frag, self.constraint_manager.get_io_signals(), - clock_domains=clock_domains, return_ns=True, **kwargs) + src, vns = verilog.convert(frag, self.constraint_manager.get_io_signals(), return_ns=True, **kwargs) # resolve signal names in constraints sc = self.constraint_manager.get_sig_constraints() named_sc = [(vns.get_name(sig), pins, others, resource) for sig, pins, others, resource in sc] @@ -230,7 +228,7 @@ class GenericPlatform: self.constraint_manager.restore(backup) return src, named_sc, named_pc - def build(self, fragment, clock_domains=None): + def build(self, fragment): raise NotImplementedError("GenericPlatform.build must be overloaded") def add_arguments(self, parser): diff --git a/mibuild/xilinx_ise.py b/mibuild/xilinx_ise.py index 698d0b04..dd3d3263 100644 --- a/mibuild/xilinx_ise.py +++ b/mibuild/xilinx_ise.py @@ -3,10 +3,11 @@ from decimal import Decimal from migen.fhdl.structure import * from migen.fhdl.specials import Instance, SynthesisDirective +from migen.fhdl.module import Module from migen.genlib.cdc import * from mibuild.generic_platform import * -from mibuild.crg import CRG, SimpleCRG +from mibuild.crg import SimpleCRG from mibuild import tools def _add_period_constraint(platform, clk, period): @@ -18,20 +19,21 @@ class CRG_SE(SimpleCRG): SimpleCRG.__init__(self, platform, clk_name, rst_name, rst_invert) _add_period_constraint(platform, self.cd.clk, period) -class CRG_DS(CRG): - def __init__(self, platform, clk_name, rst_name, period): - self.cd = ClockDomain("sys") +class CRG_DS(Module): + def __init__(self, platform, clk_name, rst_name, period, rst_invert=False): + self.clock_domains.cd_sys = ClockDomain() self._clk = platform.request(clk_name) - platform.request(rst_name, None, self.cd.rst) + if rst_invert: + rst_n = platform.request(rst_name) + self.comb += self.cd_sys.rst.eq(~rst_n) + else: + platform.request(rst_name, None, self.cd.rst) _add_period_constraint(platform, self._clk.p, period) - - def get_fragment(self): - ibufg = Instance("IBUFGDS", + self.specials += Instance("IBUFGDS", Instance.Input("I", self._clk.p), Instance.Input("IB", self._clk.n), Instance.Output("O", self.cd.clk) ) - return Fragment(specials={ibufg}) def _format_constraint(c): if isinstance(c, Pins): @@ -127,12 +129,12 @@ class XilinxISEPlatform(GenericPlatform): so.update(special_overrides) return GenericPlatform.get_verilog(self, *args, special_overrides=so, **kwargs) - def build(self, fragment, clock_domains=None, build_dir="build", build_name="top", + def build(self, fragment, build_dir="build", build_name="top", ise_path="/opt/Xilinx", run=True): tools.mkdir_noerror(build_dir) os.chdir(build_dir) - v_src, named_sc, named_pc = self.get_verilog(fragment, clock_domains) + v_src, named_sc, named_pc = self.get_verilog(fragment) v_file = build_name + ".v" tools.write_to_file(v_file, v_src) sources = self.sources + [(v_file, "verilog")]