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Open topic with navigation CAPL Functions » VT System » vtsSetPWMStartDelay

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vtsSetPWMStartDelay

Valid for: CANoe DE • CANoe:lite DE Note
The function can only be called on system variable namespaces of appropriate channels of VT System modules.

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Function Syntax

long vtsSetPWMStartDelay (char Target[], double StartDelay);

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Description

Specifies a delay for the start of a curve stimulation or PWM stimulation. This function is supported by the modules VT2004 and VT2848.

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Parameters

  • Target: Name of the system variable/namespace that will be affected by this function call.
  • StartDelay: Time for that the start of PWM or curve output is delayed. This function can be used e.g. to put out several signals with a defined phase shift. The StartDelay is denoted in seconds. Allowed values are from 0.0…4.0 (4s). This parameter is transferred to the VT System with nanosecond resolution.

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Return Values

  • 0: Successful call
  • -1: Call error
  • -2: The namespace on which the command was called does not exist, is not a valid VT System namespace or does not support this command.
  • -3: The specified StartDelay is not valid

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Example

In the following example the PWM output of two VT2004 channels is simulating two sensors with PWM output. The SetPWMStartDelay command ensures that the PWM output on channel Sensor2 is starting 2ms later to produce the corresponding phase shift.

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CAPL

// Set up PWM stimulation for sensor 1

// Set voltage stimulation mode
vtsSetStimulationMode( "VTS::Sensor1", 1);
// Set curve type PWM
vtsSetCurveType("VTS::Sensor1", 1);
// Set the low voltage of the PWM signal to 10V
vtsSetPWMVoltageLow("VTS::Sensor1", 10);
// Set the high voltage of the PWM signal to 14V
vtsSetPWMVoltageHigh("VTS::Sensor1", 14);
// Set duty cycle to 40%
@sysvar::VTS::Sensor1::PWMDC = 40;
// Set frequency to 100Hz
@sysvar::VTS::Sensor1::PWMFreq = 100;

// Set up PWM stimulation for sensor 2

// Set voltage stimulation mode
vtsSetStimulationMode("VTS::Sensor2", 1);
// Set curve type PWM
vtsSetCurveType("VTS::Sensor2", 1);
// Set the low voltage of the PWM signal to 10V
vtsSetPWMVoltageLow("VTS::Sensor2", 10);
// Set the high voltage of the PWM signal to 14V
vtsSetPWMVoltageHigh("VTS::Sensor2", 14);
// Set duty cycle to 40%
@sysvar::VTS::Sensor2::PWMDC = 40;
// Set frequency to 100Hz
@sysvar::VTS::Sensor2::PWMFreq = 100;

// set a start delay of 2ms for Sensor2
// -> PWM signals have a slight phase shift
vtsSetPWMStartDelay("VTS::Sensor2",  0.002);

// Start stimulation
vtsStartStimulation("VTS::Sensor1");
vtsStartStimulation("VTS::Sensor2");
SetPWMStartDelay