From 89fefef3f8fc78b1fceefe93dcb3385efacdb79a Mon Sep 17 00:00:00 2001 From: Florent Kermarrec Date: Tue, 17 Mar 2015 16:22:22 +0100 Subject: [PATCH] genlib/io: add optional external rst to CRG --- migen/genlib/io.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/migen/genlib/io.py b/migen/genlib/io.py index 586dcf8c4..cd4360729 100644 --- a/migen/genlib/io.py +++ b/migen/genlib/io.py @@ -35,7 +35,7 @@ class DifferentialOutput(Special): raise NotImplementedError("Attempted to use a differential output, but platform does not support them") class CRG(Module): - def __init__(self, clk): + def __init__(self, clk, rst=Signal()): self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_por = ClockDomain(reset_less=True) @@ -46,7 +46,7 @@ class CRG(Module): # Power on Reset (vendor agnostic) rst_n = Signal() - self.sync.por += rst_n.eq(1) + self.sync.por += rst_n.eq(1 & ~rst) self.comb += [ self.cd_sys.clk.eq(clk), self.cd_por.clk.eq(clk),