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cores/clock/ECP5PLL: add phase support.

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This commit is contained in:
Florent Kermarrec 2020-03-24 19:09:05 +01:00
parent 0123ccc893
commit bba5f1828b
1 changed files with 14 additions and 18 deletions
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16
litex/soc/cores/clock.py
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@ -596,9 +596,6 @@ class iCE40PLL(Module):
# Lattice / ECP5 ----------------------------------------------------------------------------------- # Lattice / ECP5 -----------------------------------------------------------------------------------
# TODO:
# - add proper phase support.
class ECP5PLL(Module): class ECP5PLL(Module):
nclkouts_max = 3 nclkouts_max = 3
clkfb_div_range = (1, 128+1) clkfb_div_range = (1, 128+1)
@ -681,22 +678,21 @@ class ECP5PLL(Module):
("MFG_ENABLE_FILTEROPAMP", "1"), ("MFG_ENABLE_FILTEROPAMP", "1"),
("MFG_GMCREF_SEL", "2")], ("MFG_GMCREF_SEL", "2")],
i_RST = self.reset, i_RST = self.reset,
i_CLKI = self.clkin, i_CLKI = self.clkin,
o_LOCK = self.locked, o_LOCK = self.locked,
p_FEEDBK_PATH = "INT_OS3", # CLKOS3 reserved for feedback with div=1.
p_FEEDBK_PATH = "INT_OS3", # CLKOS3 reserved for p_CLKOS3_ENABLE = "ENABLED",
p_CLKOS3_ENABLE = "ENABLED", # feedback with div=1.
p_CLKOS3_DIV = 1, p_CLKOS3_DIV = 1,
p_CLKFB_DIV = config["clkfb_div"], p_CLKFB_DIV = config["clkfb_div"],
p_CLKI_DIV = 1, p_CLKI_DIV = 1,
) )
for n, (clk, f, p, m) in sorted(self.clkouts.items()): for n, (clk, f, p, m) in sorted(self.clkouts.items()):
n_to_l = {0: "P", 1: "S", 2: "S2"} n_to_l = {0: "P", 1: "S", 2: "S2"}
div = config["clko{}_div".format(n)]
cphase = int(p*(div + 1)/360 + div)
self.params["p_CLKO{}_ENABLE".format(n_to_l[n])] = "ENABLED" self.params["p_CLKO{}_ENABLE".format(n_to_l[n])] = "ENABLED"
self.params["p_CLKO{}_DIV".format(n_to_l[n])] = config["clko{}_div".format(n)] self.params["p_CLKO{}_DIV".format(n_to_l[n])] = div
self.params["p_CLKO{}_FPHASE".format(n_to_l[n])] = 0 self.params["p_CLKO{}_FPHASE".format(n_to_l[n])] = 0
self.params["p_CLKO{}_CPHASE".format(n_to_l[n])] = p self.params["p_CLKO{}_CPHASE".format(n_to_l[n])] = cphase
self.params["o_CLKO{}".format(n_to_l[n])] = clk self.params["o_CLKO{}".format(n_to_l[n])] = clk
self.specials += Instance("EHXPLLL", **self.params) self.specials += Instance("EHXPLLL", **self.params)