Mux PSP

This MotoHawk™ block provides an interface to the MuxPSP (Periodic Synchronous Pulse) behavior in ControlCore (the operating system of the ECU).

Block ID

Mux PSP

Library

MotoHawk_lib/Advanced Digital I/O

Description

The Angle Vector Parameter specifies the scheduled firing of each pulse. The length of the vector also specifies the number of pulses that will be produced. The input ports may be scalars or vectors, but if vectors, the size must equal the number of pulses. The "Name" parameter on this block allows the use of the MuxPSP Set block. This separates the definition from the modifier of the underlying run time attributes. Due to hardware resource constraints there is some complexity when choosing pins in an application.

Typical block use might be for a mechanical ignition distributor.

No protection is provided against the application employing pulse timings that overlap. Overlapping timings will result in unexpected pulse behaviour. It is assumed that this behaviour is targeted at ignition systems and therefore should not normally experience pulse overlap.

Angle inputs are before TDC (BfTDC), in units of 1/16th of degree crank angle. Time inputs are in microseconds. Eg: 730degBfTCD == 10degBfTDC == -710degBfTDC

Angles are converted internally to Mod(angle, DegInCycle). It is therefore not possible to schedule a pulse more than one cycle into the future. When Mod(start - stop,DegInCycle) == 0, angular duration is considered to be zero. For example, this will occur on a 4-stroke when start = 720, stop = 0. To achieve a maximum angle, stop = start - DegInCycle - 1/16.

Block Parameters

Parameter Field	Values	Comments/Description
Name	Alpha-numeric text, single-quote enclosed	Name of the resource. Should be unique and C-legal (no special characters such as spaces, dashes or commas (underscore allowed).
Resource	Drop-down list	Select output resource for this block (target dependent).
Angle Vector (1 element per pulse, 1-8, TDC)	Numeric array	The input ports may be scalars or vectors, but if vectors, the size must equal the number of pulses. Example - [0 90 180].
Stop Mode		Select method for Stop
	Angle Controlled	Control Stop Mode by Angle
	Duration Controlled	Control Stop Mode by Time Duration
Update Mode	OS/Application	Select OS to have the system update for errors. Select Application to allow the application to run without updates.
Granularity	Fine or Course	Fine granularity (resolution) interpolates engine position between encoder teeth. Can result in reduced maximum duty cycle for MPC5xx based modules. Course granularity does not use interpolation. Angles resolve to the closest encoder tooth. Modules besides those cores that have an MPC5xx ignore this setting and utilize fine granularity irrespective of this setting.
Minimum Duration Mode	Static or Dynamic	Only applicable to MPC5xx based modules. Any scheduled duration smaller than this value is considered to have zero duration when scheduled. Is a member of the mask when the static Minimum Duration Mode is selected and is a signal when dynamic is selected.
Minimum Duration (ms)	Numeric	Enter value for duration. Only applicable if a Static Minimum Duration Mode was selected.
Show Ports	Check box (enable)	Enable to show input ports on the block.