forked from M-Labs/artiq
devices/dds_core: use new compiler features to compute tuning word trivially
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@ -13,8 +13,7 @@ class DDS(AutoContext):
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def pulse(self, frequency, duration):
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if self._previous_frequency != frequency:
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syscall("rtio_sync", self.rtio_channel) # wait until output is off
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syscall("dds_program", self.reg_channel,
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(frequency << 2)//(self.dds_sysclk >> 15) << 15)
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syscall("dds_program", self.reg_channel, int(2**32*frequency/self.dds_sysclk))
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self._previous_frequency = frequency
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syscall("rtio_set", now(), self.rtio_channel, 1)
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delay(duration)
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