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manual: add core.reset() calls

This commit is contained in:
Sebastien Bourdeauducq 2016-06-29 11:48:33 +08:00
parent a1cc964c6c
commit 18eddd00e1
1 changed files with 5 additions and 0 deletions
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5
doc/manual/getting_started_core.rst
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@ -18,6 +18,7 @@ As a very first step, we will turn on a LED on the core device. Create a file ``
@kernel @kernel
def run(self): def run(self):
self.core.reset()
self.led.on() self.led.on()
The central part of our code is our ``LED`` class, that derives from :class:`artiq.language.environment.EnvExperiment`. Among other features, ``EnvExperiment`` calls our ``build`` method and provides the ``setattr_device`` method that interfaces to the device database to create the appropriate device drivers and make those drivers accessible as ``self.core`` and ``self.led``. The ``@kernel`` decorator tells the system that the ``run`` method must be executed on the core device (instead of the host). The decorator uses ``self.core`` internally, which is why we request the core device using ``setattr_device`` like any other. The central part of our code is our ``LED`` class, that derives from :class:`artiq.language.environment.EnvExperiment`. Among other features, ``EnvExperiment`` calls our ``build`` method and provides the ``setattr_device`` method that interfaces to the device database to create the appropriate device drivers and make those drivers accessible as ``self.core`` and ``self.led``. The ``@kernel`` decorator tells the system that the ``run`` method must be executed on the core device (instead of the host). The decorator uses ``self.core`` internally, which is why we request the core device using ``setattr_device`` like any other.
@ -53,6 +54,7 @@ Modify the code as follows: ::
@kernel @kernel
def run(self): def run(self):
self.core.reset()
s = input_led_state() s = input_led_state()
self.core.break_realtime() self.core.break_realtime()
if s: if s:
@ -91,6 +93,7 @@ Create a new file ``rtio.py`` containing the following: ::
@kernel @kernel
def run(self): def run(self):
self.core.reset()
for i in range(1000000): for i in range(1000000):
self.ttl0.pulse(2*us) self.ttl0.pulse(2*us)
delay(2*us) delay(2*us)
@ -119,6 +122,7 @@ Try reducing the period of the generated waveform until the CPU cannot keep up w
@kernel @kernel
def run(self): def run(self):
self.core.reset()
try: try:
for i in range(1000000): for i in range(1000000):
self.ttl0.pulse(...) self.ttl0.pulse(...)
@ -141,6 +145,7 @@ The core device records the real-time I/O waveforms into a circular buffer. It i
@kernel @kernel
def run(self): def run(self):
self.core.reset()
for i in range(100): for i in range(100):
self.ttl0.pulse(...) self.ttl0.pulse(...)
rtio_log("ttl0", "i", i) rtio_log("ttl0", "i", i)