2118-2128: add <8ns short pulse example

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occheung 2022-06-07 13:49:14 +08:00
parent f5ce9e19e9
commit 2a5066ac5f
2 changed files with 22 additions and 1 deletions

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@ -508,10 +508,19 @@ The channel should be configured as output in both the gateware and hardware.
\newpage \newpage
\subsection{Sub-coarse-RTIO-cycle pulse}
With the use of the ARTIQ RTIO, only 1 event can be enqueued per coarse RTIO cycle, which is typically 8ns.
Therefore, to emit a pulse that is less than 8ns, additional delay is needed such that the \texttt{ttl.on()} \& \texttt{ttl.off()} event are submitted at different coarse RTIO cycles.
The TTL pulse parameter must satisfy the minimum pulse width stated in the electircal specifications.
\inputcolorboxminted{firstline=88,lastline=92}{examples/ttl.py}
\subsection{Morse code} \subsection{Morse code}
This example demonstrates some basic algorithmic features of the ARTIQ-Python language. This example demonstrates some basic algorithmic features of the ARTIQ-Python language.
\inputcolorboxminted{firstline=22,lastline=39}{examples/ttl.py} \inputcolorboxminted{firstline=22,lastline=39}{examples/ttl.py}
\newpage
\subsection{Counting rising edges in a 1ms window} \subsection{Counting rising edges in a 1ms window}
The channel should be configured as input in both the gateware and hardware. The channel should be configured as input in both the gateware and hardware.
\inputcolorboxminted{firstline=47,lastline=52}{examples/ttl.py} \inputcolorboxminted{firstline=47,lastline=52}{examples/ttl.py}
@ -520,7 +529,7 @@ This example code uses the software counter, which has a maximum count rate of a
If the gateware counter is enabled on the TTL channel, it can typically count up to 125 million events per second: If the gateware counter is enabled on the TTL channel, it can typically count up to 125 million events per second:
\inputcolorboxminted{firstline=60,lastline=65}{examples/ttl.py} \inputcolorboxminted{firstline=60,lastline=65}{examples/ttl.py}
\newpage To count falling edges or both rising \& falling edges, use \texttt{gate\char`_falling()} or \texttt{gate\char`_both()}.
\subsection{Responding to an external trigger} \subsection{Responding to an external trigger}
One channel needs to be configured as input, and the other as output. One channel needs to be configured as input, and the other as output.

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@ -78,3 +78,15 @@ class ExternalTrigger(EnvExperiment):
timestamp_mu = self.ttlin.timestamp_mu(gate_end_mu) timestamp_mu = self.ttlin.timestamp_mu(gate_end_mu)
at_mu(timestamp_mu + self.core.seconds_to_mu(10*ms)) at_mu(timestamp_mu + self.core.seconds_to_mu(10*ms))
self.ttlout.pulse(1*us) self.ttlout.pulse(1*us)
class ShortPulse(EnvExperiment):
def build(self):
self.setattr_device("core")
self.ttl0 = self.get_device("ttl0")
@kernel
def run(self):
self.core.reset()
delay(6*ns)
self.ttl0.pulse(3*ns)