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wrpll.core: update for modified collector

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hartytp 2020-10-05 20:59:27 +01:00 committed by Sebastien Bourdeauducq
parent 17c952b8fb
commit e9ab434fa7
1 changed files with 12 additions and 16 deletions
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28
artiq/gateware/drtio/wrpll/core.py
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@ -76,32 +76,28 @@ class WRPLL(Module, AutoCSR):
ddmtd_counter = Signal(N) ddmtd_counter = Signal(N)
self.sync.helper += ddmtd_counter.eq(ddmtd_counter + 1) self.sync.helper += ddmtd_counter.eq(ddmtd_counter + 1)
self.submodules.ddmtd_helper = DDMTD(ddmtd_counter, ddmtd_inputs.rec_clk) self.submodules.ddmtd_ref = DDMTD(ddmtd_counter, ddmtd_inputs.rec_clk)
self.submodules.ddmtd_main = DDMTD(ddmtd_counter, ddmtd_inputs.main_xo) self.submodules.ddmtd_main = DDMTD(ddmtd_counter, ddmtd_inputs.main_xo)
collector_update = Signal()
self.sync.helper += collector_update.eq(ddmtd_counter == (2**N - 1))
filter_cd = ClockDomainsRenamer("filter") filter_cd = ClockDomainsRenamer("filter")
self.submodules.collector = filter_cd(Collector(N)) self.submodules.collector = filter_cd(Collector(N))
self.submodules.filter_helper = filter_cd(thls.make(filters.helper, data_width=48)) self.submodules.filter_helper = filter_cd(
self.submodules.filter_main = filter_cd(thls.make(filters.main, data_width=48)) thls.make(filters.helper, data_width=48))
self.submodules.filter_main = filter_cd(
thls.make(filters.main, data_width=48))
self.comb += [ self.comb += [
self.collector.tag_helper.eq(self.ddmtd_helper.h_tag), self.collector.tag_ref.eq(self.ddmtd_ref.h_tag),
self.collector.tag_helper_update.eq(self.ddmtd_helper.h_tag_update), self.collector.ref_stb.eq(self.ddmtd_ref.h_tag_update),
self.collector.tag_main.eq(self.ddmtd_main.h_tag), self.collector.tag_main.eq(self.ddmtd_main.h_tag),
self.collector.tag_main_update.eq(self.ddmtd_main.h_tag_update) self.collector.main_stb.eq(self.ddmtd_main.h_tag_update)
] ]
# compensate the 1 cycle latency of the collector
self.sync.helper += [
self.filter_helper.input.eq(self.ddmtd_helper.h_tag),
self.filter_helper.input_stb.eq(self.ddmtd_helper.h_tag_update)
]
self.comb += [ self.comb += [
self.filter_main.input.eq(self.collector.output), self.filter_helper.input.eq(self.collector.out_helper),
self.filter_main.input_stb.eq(collector_update) self.filter_helper.input_stb.eq(self.collector.out_stb),
self.filter_main.input.eq(self.collector.out_main),
self.filter_main.input_stb.eq(self.collector.out_stb)
] ]
self.sync.helper += [ self.sync.helper += [