PulseGen

Overview

Generates a periodic rectangular pulse

Discussion

This module generates a periodic rectangular pulse. The overall period of the pulse, in msec, is specified by the variable period. The pulse starts at a value of 1.0 and stays on for onTime msec.

You can enable and disable the pulse generate by setting the isOn variable. When turned off, the pulse generator completes the last period of the wave form.

Type Definition

CODE

typedef struct _ModulePulseGen
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    FLOAT32 period;                               // Total period of the pulse.
    FLOAT32 onTime;                               // Duration of the positive portion of the pulse.
    INT32 isOn;                                   // Boolean that turns the beeping on or off.
    INT32 periodSamples;                          // Total period of the pulse in samples.
    INT32 onTimeSamples;                          // Duration of the positive period of the pulse in samples.
    INT32 count;                                  // Sample counter that increments for each value output.
} ModulePulseGenClass;

Variables

Properties

Name	Type	Usage	isHidden	Default value	Range	Units
period	float	parameter	0	500	0:1000	msec
onTime	float	parameter	0	100	0:1000	msec
isOn	int	parameter	0	1	0:1
periodSamples	int	derived	1	24000	Unrestricted
onTimeSamples	int	derived	1	4800	Unrestricted
count	int	state	1	0	Unrestricted

Pins

Output Pins

Name: out

Description: output data

Data type: float

MATLAB Usage

File Name: pulse_gen_module.m

CODE

 M=pulse_gen_module(NAME, BLOCKSIZE, SAMPLERATE)
 This module creates a period rectangular pulse with amplitude 0.0
 and 1.0. 
 
 Arguments:
    NAME - name of the module.
    BLOCKSIZE - number of samples per 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.