From 675f78304ef613b28d4cd4c83ce87f941436ad70 Mon Sep 17 00:00:00 2001 From: Florent Kermarrec Date: Tue, 28 May 2019 09:55:06 +0200 Subject: [PATCH] boards/targets/arty: generate 25MHz ethernet clock with S7PLL Allow ethernet to work when sys_clk_freq != 100MHz --- litex/boards/targets/arty.py | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/litex/boards/targets/arty.py b/litex/boards/targets/arty.py index e1feeda2a..54e5e52b2 100755 --- a/litex/boards/targets/arty.py +++ b/litex/boards/targets/arty.py @@ -25,6 +25,7 @@ class _CRG(Module): self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True) self.clock_domains.cd_clk200 = ClockDomain() + self.clock_domains.cd_eth = ClockDomain() # # # @@ -39,14 +40,11 @@ class _CRG(Module): pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90) pll.create_clkout(self.cd_clk200, 200e6) + pll.create_clkout(self.cd_eth, 25e6) self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200) - eth_clk = Signal() - self.specials += [ - Instance("BUFR", p_BUFR_DIVIDE="4", i_CE=1, i_CLR=0, i_I=self.cd_sys.clk, o_O=eth_clk), - Instance("BUFG", i_I=eth_clk, o_O=platform.request("eth_ref_clk")), - ] + self.comb += platform.request("eth_ref_clk").eq(self.cd_eth.clk) # BaseSoC ------------------------------------------------------------------------------------------