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doc/rtio: input vis

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Robert Jördens 2016-08-25 18:42:16 +02:00
parent aef99b5164
commit 6e8ff374d7
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doc/manual/rtio.rst
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@ -115,6 +115,21 @@ The :meth:`artiq.coredevice.ttl.TTLInOut.count` method of an input channel can l
The :meth:`artiq.coredevice.ttl.TTLInOut.gate_rising` method leaves the timeline cursor at the closure time of the gate and ``count()`` must necessarily wait until the gate closing event has actually been executed which is sometime with ``rtio_counter > now``.
In these situations where ``count()`` leads to a synchronization of timeline cursor and wall clock, a ``delay()`` is necessary to reestablish positive slack so that output events can be placed.
.. wavedrom::
{
signal: [
{name: 'kernel', wave: '3..4|..2.5..x..', data: ['gate_rising()', 'count()', 'delay()', 'pulse()'], node: '.A.B...C.ZD.E'},
{name: 'now_mu', wave: '2.2.|....2.2.', node: '.P.Q.....XV.W'},
{},
{},
{name: 'input gate', wave: 'x1.0', node: '.T.U', phase: -3.5},
{name: 'output', wave: 'x1.0', node: '.R.S', phase: -11.5}
],
edge: [
'A~>T', 'P~>T', 'B~>U', 'Q~>U', 'U~>C', 'D~>R', 'E~>S', 'V~>R', 'W~>S'
]
}
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