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wrpll.core: add CSRs to monitor the collector outputs

pull/1529/head
hartytp 2020-10-06 16:29:11 +01:00 committed by Sebastien Bourdeauducq
parent f2f942a8b4
commit 87911810d6
1 changed files with 41 additions and 0 deletions
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41
artiq/gateware/drtio/wrpll/core.py
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@ -8,6 +8,13 @@ from artiq.gateware.drtio.wrpll.ddmtd import DDMTD, Collector
from artiq.gateware.drtio.wrpll import thls, filters
def _eq_sign_extend(t, s):
"""Assign target signal `t` from source `s`, sign-extending `s` to the
full width.
"""
return t.eq(Cat(s, Replicate(s[-1], len(t) - len(s))))
class FrequencyCounter(Module, AutoCSR):
def __init__(self, timer_width=23, counter_width=23, domains=["helper", "rtio", "rtio_rx0"]):
for domain in domains:
@ -55,6 +62,12 @@ class WRPLL(Module, AutoCSR):
self.adpll_offset_helper = CSRStorage(24)
self.adpll_offset_main = CSRStorage(24)
self.tag_arm = CSR()
self.main_diff_tag = CSRStatus(32)
self.helper_diff_tag = CSRStatus(32)
self.ref_tag = CSRStatus(N)
self.main_tag = CSRStatus(N)
self.clock_domains.cd_helper = ClockDomain()
self.clock_domains.cd_filter = ClockDomain()
self.helper_reset.storage.attr.add("no_retiming")
@ -93,6 +106,34 @@ class WRPLL(Module, AutoCSR):
self.collector.main_stb.eq(self.ddmtd_main.h_tag_update)
]
collector_stb_ps = PulseSynchronizer("helper", "sys")
self.submodules += collector_stb_ps
self.sync.helper += collector_stb_ps.i.eq(self.collector.out_stb)
collector_stb_sys = Signal()
self.sync += collector_stb_sys.eq(collector_stb_ps.o)
main_diff_tag_sys = Signal((N+2, True))
helper_diff_tag_sys = Signal((N+2, True))
ref_tag_sys = Signal(N)
main_tag_sys = Signal(N)
self.specials += MultiReg(self.collector.out_main, main_diff_tag_sys)
self.specials += MultiReg(self.collector.out_helper, helper_diff_tag_sys)
self.specials += MultiReg(self.collector.tag_ref, ref_tag_sys)
self.specials += MultiReg(self.collector.tag_main, main_tag_sys)
self.sync += [
If(self.tag_arm.re & self.tag_arm.r, self.tag_arm.w.eq(1)),
If(collector_stb_sys,
self.tag_arm.w.eq(0),
If(self.tag_arm.w,
_eq_sign_extend(self.main_diff_tag.status, main_diff_tag_sys),
_eq_sign_extend(self.helper_diff_tag.status, helper_diff_tag_sys),
self.ref_tag.status.eq(ref_tag_sys),
self.main_tag.status.eq(main_tag_sys)
)
)
]
self.comb += [
self.filter_helper.input.eq(self.collector.out_helper << 22),
self.filter_helper.input_stb.eq(self.collector.out_stb),