.. _gettingStartedSampleHoldBlockDoc:

.. index:: single: Example; SampleHold Block

================
SampleHold Block
================

::

	signal Sample { default: 0.0 rate: none domain: AudioDomain reset: none }

	AnalongIn[1] >> SampleHold ( event: DigitalIn[1] ) >> Sample;

::

	module SampleHold {
		input:			Input
		output:			Output
		propertyName:		'event'
		propertyDirection:	in
		propertyBlock:		trigger Trigger {}
		internalBlock:		[
			hybrid Input {
				type:		[ 'Stream Real', 'Stream Integer', 'Constant Real', 'Constant Integer' ]
				default:	[ 0.0, 0 ]
				rate:		none
				domain:		streamDomain
				reset:		none
			},
			hybrid Output {
				type:		[ 'Stream Real', 'Stream Integer' ]
				default:	[ 0.0, 0 ]
				rate:		none
				domain:		streamDomain
				reset:		none
			},
			reaction GetSample {
				output:		Sample
				onExecution:	Reset
				terminateWhen:	Sampled
				internalBlock:	[	
					hybrid Sample {
						type:		[ 'Stream Real', 'Stream Integer' ]
						default:	[ 0.0, 0 ]
						rate:		none
						reset:		none
						domain:		streamDomain
					},
					switch Sampled { default: Off reset: Reset },
					trigger Reset {}
				]
				streams:	[
					Input >> Sample;
					on >> Sampled;
				]
			}
		]
		streams:		Trigger >> GetSample () >> Output;
	}