soc/cores/clock: create specific S7IDELAYCTRL module

This commit is contained in:
Florent Kermarrec 2018-09-24 23:22:59 +02:00
parent baec87f530
commit 912ca3236b
2 changed files with 16 additions and 13 deletions

View File

@ -32,7 +32,8 @@ 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.add_idelayctrl(self.cd_clk200)
self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200)
eth_clk = Signal()
self.specials += [

View File

@ -83,18 +83,6 @@ class S7Clocking(Module):
return config
raise ValueError("No PLL config found")
def add_idelayctrl(self, cd):
reset_counter = Signal(4, reset=15)
ic_reset = Signal(reset=1)
sync = getattr(self.sync, cd.name)
sync += \
If(reset_counter != 0,
reset_counter.eq(reset_counter - 1)
).Else(
ic_reset.eq(0)
)
self.specials += Instance("IDELAYCTRL", i_REFCLK=cd.clk, i_RST=ic_reset)
def do_finalize(self):
assert hasattr(self, "clkin")
@ -144,3 +132,17 @@ class S7MMCM(S7Clocking):
mmcm_params["p_CLKOUT{}_PHASE".format(n)] = config["clkout{}_phase".format(n)]
mmcm_params["o_CLKOUT{}".format(n)] = clk
self.specials += Instance("MMCME2_BASE", **mmcm_params)
class S7IDELAYCTRL(Module):
def __init__(self, cd):
reset_counter = Signal(4, reset=15)
ic_reset = Signal(reset=1)
sync = getattr(self.sync, cd.name)
sync += \
If(reset_counter != 0,
reset_counter.eq(reset_counter - 1)
).Else(
ic_reset.eq(0)
)
self.specials += Instance("IDELAYCTRL", i_REFCLK=cd.clk, i_RST=ic_reset)