From: Sebastien Bourdeauducq Date: Thu, 16 Feb 2012 18:30:00 +0000 (+0100) Subject: clkfx: remove X-Git-Tag: 24jan2021_ls180~3237 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cc5e4ae7103bf1bc697a0587e4027b5ebc248a7e;p=litex.git clkfx: remove --- diff --git a/milkymist/clkfx/__init__.py b/milkymist/clkfx/__init__.py deleted file mode 100644 index e90183eb..00000000 --- a/milkymist/clkfx/__init__.py +++ /dev/null @@ -1,38 +0,0 @@ -from fractions import Fraction - -from migen.fhdl.structure import * - -class ClkFX: - def __init__(self, infreq, outfreq): - self.clkin = Signal() - self.clkout = Signal() - - ratio = Fraction(outfreq)/Fraction(infreq) - appr = ratio.limit_denominator(32) - m = appr.numerator - if m < 2 or m > 32: - raise OverflowError - d = appr.denominator - - in_period = float(Fraction(1000000000)/Fraction(infreq)) - - self._inst = Instance("DCM_SP", - [("CLKFX", self.clkout)], - [("CLKIN", self.clkin), - ("PSEN", BV(1)), - ("RST", BV(1))], - [("CLKDV_DIVIDE", 2.0), - ("CLKFX_DIVIDE", d), - ("CLKFX_MULTIPLY", m), - ("CLKIN_DIVIDE_BY_2", "FALSE"), - ("CLKIN_PERIOD", in_period), - ("CLKOUT_PHASE_SHIFT", "NONE"), - ("CLK_FEEDBACK", "NONE"), - ("DESKEW_ADJUST", "SYSTEM_SYNCHRONOUS"), - ("DUTY_CYCLE_CORRECTION", "TRUE"), - ("PHASE_SHIFT", 0), - ("STARTUP_WAIT", "TRUE")] - ) - - def get_fragment(self): - return Fragment([self._inst.ins["PSEN"].eq(0), self._inst.ins["RST"].eq(0)], instances=[self._inst])