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kc705_dds: make ext_clkout 100 MHz

This commit is contained in:
Robert Jördens 2018-01-02 17:38:11 +00:00 committed by Robert Jordens
parent 43686f324b
commit c2be820e9a
1 changed files with 2 additions and 3 deletions
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5
artiq/gateware/targets/kc705_dds.py
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@ -29,12 +29,11 @@ class _RTIOCRG(Module, AutoCSR):
self.clock_domains.cd_rtio = ClockDomain()
self.clock_domains.cd_rtiox4 = ClockDomain(reset_less=True)
# 10 MHz when using 125MHz input
# 100 MHz when using 125MHz input
self.clock_domains.cd_ext_clkout = ClockDomain(reset_less=True)
ext_clkout = platform.request("user_sma_gpio_p_33")
self.sync.ext_clkout += ext_clkout.eq(~ext_clkout)
rtio_external_clk = Signal()
user_sma_clock = platform.request("user_sma_clock")
platform.add_period_constraint(user_sma_clock.p, 8.0)
@ -66,7 +65,7 @@ class _RTIOCRG(Module, AutoCSR):
p_CLKOUT0_DIVIDE=2, p_CLKOUT0_PHASE=0.0,
o_CLKOUT0=rtiox4_clk,
p_CLKOUT1_DIVIDE=50, p_CLKOUT1_PHASE=0.0,
p_CLKOUT1_DIVIDE=5, p_CLKOUT1_PHASE=0.0,
o_CLKOUT1=ext_clkout_clk),
Instance("BUFG", i_I=rtio_clk, o_O=self.cd_rtio.clk),
Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),