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artiq/examples/rtio_skew.py

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from artiq import *
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from artiq.coredevice import comm_serial, core, rtio
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def print_skew(p):
print("Input/output skew: {} ns".format(p))
def print_failed():
print("Pulse was not received back")
class RTIOSkew(AutoContext):
i = Device("ttl_in")
o = Device("ttl_out")
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@kernel
def run(self):
with parallel:
self.i.gate_rising(10*us)
with sequential:
delay(5*us)
out_t = now()
self.o.pulse(5*us)
in_t = self.i.timestamp()
if in_t < 0*s:
print_failed()
else:
print_skew(int((out_t - in_t)/(1*ns)))
if __name__ == "__main__":
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with comm_serial.Comm() as comm:
coredev = core.Core(comm)
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exp = RTIOSkew(core=coredev,
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i=rtio.RTIOIn(core=coredev, channel=0),
o=rtio.RTIOOut(core=coredev, channel=2))
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exp.run()