From 535d86727ad350a07aa02b67173c0ea4d1e980e5 Mon Sep 17 00:00:00 2001 From: Florent Kermarrec Date: Tue, 23 Apr 2019 06:44:29 +0200 Subject: [PATCH] targets/minispartan6: use S6PLL in CRG --- litex/boards/targets/minispartan6.py | 43 ++++------------------------ 1 file changed, 5 insertions(+), 38 deletions(-) diff --git a/litex/boards/targets/minispartan6.py b/litex/boards/targets/minispartan6.py index 2f3ed445..9f745282 100755 --- a/litex/boards/targets/minispartan6.py +++ b/litex/boards/targets/minispartan6.py @@ -8,6 +8,7 @@ from migen.genlib.resetsync import AsyncResetSynchronizer from litex.boards.platforms import minispartan6 +from litex.soc.cores.clock import * from litex.soc.integration.soc_sdram import * from litex.soc.integration.builder import * @@ -26,44 +27,10 @@ class _CRG(Module): self.cd_sys.clk.attr.add("keep") self.cd_sys_ps.clk.attr.add("keep") - f0 = 32*1000000 - clk32 = platform.request("clk32") - clk32a = Signal() - self.specials += Instance("IBUFG", i_I=clk32, o_O=clk32a) - clk32b = Signal() - self.specials += Instance("BUFIO2", p_DIVIDE=1, - p_DIVIDE_BYPASS="TRUE", p_I_INVERT="FALSE", - i_I=clk32a, o_DIVCLK=clk32b) - f = Fraction(int(clk_freq), int(f0)) - n, m, p = f.denominator, f.numerator, 8 - assert f0/n*m == clk_freq - pll_lckd = Signal() - pll_fb = Signal() - pll = Signal(6) - self.specials.pll = Instance("PLL_ADV", p_SIM_DEVICE="SPARTAN6", - p_BANDWIDTH="OPTIMIZED", p_COMPENSATION="INTERNAL", - p_REF_JITTER=.01, p_CLK_FEEDBACK="CLKFBOUT", - i_DADDR=0, i_DCLK=0, i_DEN=0, i_DI=0, i_DWE=0, i_RST=0, i_REL=0, - p_DIVCLK_DIVIDE=1, p_CLKFBOUT_MULT=m*p//n, p_CLKFBOUT_PHASE=0., - i_CLKIN1=clk32b, i_CLKIN2=0, i_CLKINSEL=1, - p_CLKIN1_PERIOD=1000000000/f0, p_CLKIN2_PERIOD=0., - i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb, o_LOCKED=pll_lckd, - o_CLKOUT0=pll[0], p_CLKOUT0_DUTY_CYCLE=.5, - o_CLKOUT1=pll[1], p_CLKOUT1_DUTY_CYCLE=.5, - o_CLKOUT2=pll[2], p_CLKOUT2_DUTY_CYCLE=.5, - o_CLKOUT3=pll[3], p_CLKOUT3_DUTY_CYCLE=.5, - o_CLKOUT4=pll[4], p_CLKOUT4_DUTY_CYCLE=.5, - o_CLKOUT5=pll[5], p_CLKOUT5_DUTY_CYCLE=.5, - p_CLKOUT0_PHASE=0., p_CLKOUT0_DIVIDE=p//1, - p_CLKOUT1_PHASE=0., p_CLKOUT1_DIVIDE=p//1, - p_CLKOUT2_PHASE=0., p_CLKOUT2_DIVIDE=p//1, - p_CLKOUT3_PHASE=0., p_CLKOUT3_DIVIDE=p//1, - p_CLKOUT4_PHASE=0., p_CLKOUT4_DIVIDE=p//1, # sys - p_CLKOUT5_PHASE=270., p_CLKOUT5_DIVIDE=p//1, # sys_ps - ) - self.specials += Instance("BUFG", i_I=pll[4], o_O=self.cd_sys.clk) - self.specials += Instance("BUFG", i_I=pll[5], o_O=self.cd_sys_ps.clk) - self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll_lckd) + self.submodules.pll = pll = S6PLL(speedgrade=-1) + pll.register_clkin(platform.request("clk32"), 32e6) + pll.create_clkout(self.cd_sys, clk_freq) + pll.create_clkout(self.cd_sys_ps, clk_freq, phase=270) self.specials += Instance("ODDR2", p_DDR_ALIGNMENT="NONE", p_INIT=0, p_SRTYPE="SYNC", -- 2.30.2