Overview

Generates pulse of pulseDuration, in msec, duration, when the input pin is triggered from 0 to 1.

Discussion

This module generates a rectangular pulse signal with a specified duration in response to an input trigger signal. You specify the pulse duration in milliseconds using the variable pulseDuration. The signal on the input pin triggers the pulse when it is non-zero. This module is "level-triggered" rather than the more typical "edge-triggered" The output signal is 1 while the trigger is 1 and then, once the trigger returns to 0, remains 1 for the pulse duration and 0 otherwise.

If the pulse is retriggered (trigger goes from 0 to 1) while the output is still active, then the process restarts and the output will be high for pulseDuration milliseconds.

Type Definition

typedef struct _ModuleTriggeredPulseV2
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    FLOAT32 pulseDuration;                        // Width of the output generated pulse.
    INT32 pulseDurationSamples;                   // Width of the output generated pulse in samples.
    INT32 counter;                                // Counts down for each sample while the pulse is active.
} ModuleTriggeredPulseV2Class;

Variables

Properties

Pins

Input Pins

Name: in

Description: Control input signal

Data type: int

Channel range: 1

Block size range: 1

Sample rate range: Unrestricted

Complex support: Real

Output Pins

Name: out

Description: Control output signal

Data type: int

MATLAB Usage

File Name: triggered_pulse_v2_module.m

 M = triggered_pulse_v2_module(NAME, BLOCKSIZE, SAMPLERATE)
 Creates a triggered pulse module for use with the Audio Weaver
 environment. The module generates output pulse with the duration
 specified by the parameter pulseDuration in msec, when the input pin
 is triggered from 0 to 1.  
 
 Arguments:
    NAME - name of the module.
    BLOCKSIZE - number of samples on output channel. By default,
         BLOCKSIZE inherits from the input pin.
    SAMPLERATE - sample rate of the output signal, in Hz. By default,
         SAMPLERATE inherits from the input pin.