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targets/kc705: add external reset

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This commit is contained in:
Florent Kermarrec 2015-03-19 15:58:04 +01:00
parent 84b631c929
commit 9f2e5cd7b6
1 changed files with 4 additions and 2 deletions

6
targets/kc705.py
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@ -20,6 +20,8 @@ class _CRG(Module):
clk200_se = Signal() clk200_se = Signal()
self.specials += Instance("IBUFDS", i_I=clk200.p, i_IB=clk200.n, o_O=clk200_se) self.specials += Instance("IBUFDS", i_I=clk200.p, i_IB=clk200.n, o_O=clk200_se)
rst = platform.request("cpu_reset")
pll_locked = Signal() pll_locked = Signal()
pll_fb = Signal() pll_fb = Signal()
self.pll_sys = Signal() self.pll_sys = Signal()
@ -50,8 +52,8 @@ class _CRG(Module):
Instance("BUFG", i_I=self.pll_sys, o_O=self.cd_sys.clk), Instance("BUFG", i_I=self.pll_sys, o_O=self.cd_sys.clk),
Instance("BUFG", i_I=pll_sys4x, o_O=self.cd_sys4x.clk), Instance("BUFG", i_I=pll_sys4x, o_O=self.cd_sys4x.clk),
Instance("BUFG", i_I=pll_clk200, o_O=self.cd_clk200.clk), Instance("BUFG", i_I=pll_clk200, o_O=self.cd_clk200.clk),
AsyncResetSynchronizer(self.cd_sys, ~pll_locked), AsyncResetSynchronizer(self.cd_sys, ~pll_locked | rst),
AsyncResetSynchronizer(self.cd_clk200, ~pll_locked), AsyncResetSynchronizer(self.cd_clk200, ~pll_locked | rst),
] ]
reset_counter = Signal(4, reset=15) reset_counter = Signal(4, reset=15)