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sayma: round FTW like Urukul in JDCGSyncDDS

This commit is contained in:
Sebastien Bourdeauducq 2020-04-08 15:00:33 +08:00
parent 0f4be22274
commit ec7b2bea12
1 changed files with 3 additions and 4 deletions
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7
artiq/gateware/targets/sayma_amc.py
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@ -250,21 +250,20 @@ class JDCGSyncDDS(Module, AutoCSR):
self.sawgs = [] self.sawgs = []
ftw = round(2**len(self.coarse_ts)*9e6/150e6) ftw = round(2**len(self.coarse_ts)*9e6/600e6)
parallelism = 4 parallelism = 4
mul_1 = Signal.like(self.coarse_ts) mul_1 = Signal.like(self.coarse_ts)
mul_2 = Signal.like(self.coarse_ts) mul_2 = Signal.like(self.coarse_ts)
mul_3 = Signal.like(self.coarse_ts) mul_3 = Signal.like(self.coarse_ts)
self.sync.rtio += [ self.sync.rtio += [
mul_1.eq(self.coarse_ts*ftw), mul_1.eq(self.coarse_ts*ftw*parallelism),
mul_2.eq(mul_1), mul_2.eq(mul_1),
mul_3.eq(mul_2) mul_3.eq(mul_2)
] ]
phases = [Signal.like(self.coarse_ts) for i in range(parallelism)] phases = [Signal.like(self.coarse_ts) for i in range(parallelism)]
self.sync.rtio += [phases[i].eq(mul_3 + i*ftw//parallelism) self.sync.rtio += [phases[i].eq(mul_3 + i*ftw) for i in range(parallelism)]
for i in range(parallelism)]
resolution = 10 resolution = 10
steps = 2**resolution steps = 2**resolution