Davide Luongo / WaveGen_v4

This library generate four classic waves, have an escape button to stop to generate wave. And is possible to use function for calculate period,... separately

WaveGen.cpp

Committer:
fangoman91
Date:
2015-07-24
Revision:
0:c1150498cbe9
Child:
1:cb84b066ab29

File content as of revision 0:c1150498cbe9:

#include "mbed.h"
#include "WaveGen.h"

using namespace mbed;

WaveGen::WaveGen(PinName ext,PinName WaveForm):_ext(ext),_WaveForm(WaveForm)
{
    _ext.mode(PullUp); 
    _WaveForm.write(0);   
}

int WaveGen::TCalc(int div,float Freq)
{
    float temp = 0;
    if(div == 0)   
    {
        temp = 1 / Freq;
        temp *= 1000000;
    }
    else 
    {
        temp = 1 / Freq;
        temp *= 1000000;
        temp /= div;
    }
    return (int)temp;
}

float WaveGen::VCalc(float Volt)
{
    float temp = Volt / 3.30;
    temp /= 2;
    return temp;
}

float WaveGen::RadCalc(float Ang)
{
    float temp = 0;
    temp = Ang * 0.0174532925;
    return temp;   
}

bool WaveGen::SineWave(float Frequency,float Amplitude)
{
    float temp = 0;
    int T = TCalc(20,Frequency);
    float V = VCalc(Amplitude) * 2;
    while(1)
    {
        for(int i = 0; i < 360; i += 18)
        {
            temp = 0.5 + V * sin(RadCalc((float)i));
            _WaveForm = temp;
            wait_us(T);
            if(!_ext.read())
                return true;
            else 
                return false;    
        }   
    }    
}

bool WaveGen::SquareWave(float Frequency,float Amplitude,float DutyCycle)
{
    int Ton = TCalc(0,Frequency);
    Ton *= DutyCycle;
    int Toff = Ton - TCalc(0,Frequency);  
    float V = VCalc(Amplitude); 
    while(1)
    {
        _WaveForm = V;
        wait_us(Ton);
        _WaveForm = 0;
        wait_us(Toff); 
        if(!_ext.read())
            return true;
    }    
}

bool WaveGen::TriangularWave(float Frequency,float Amplitude)
{
    float temp = 0;
    int T = TCalc(80,Frequency);
    float V = VCalc(Amplitude);
    while(1)
    {
        for(int a = 50; a < V; a += 5)
        {
            temp = (float)a / 100;
            _WaveForm = temp; 
            wait_us(T);
            if(!_ext.read())
                return true;    
        }
        for(int b = V; b > 50; b -= 5)
        {
            temp = (float)b / 100;
            _WaveForm = temp;
            wait_us(T);
            if(!_ext.read())
                return true;
        }
        for(int c = 50; c < V - 50; c -= 5)
        {
            temp = (float)c / 100;
            _WaveForm = temp;
            wait_us(T);
            if(!_ext.read())
                return true;
        }
        for(int d = V - 50; d < 50; d += 5)
        {
            temp = (float)d / 100;
            _WaveForm = temp;
            wait_us(T);
            if(!_ext.read())
                return true;
        } 
    }
}

bool WaveGen::SawToothWave(float Frequency,float Amplitude)
{
    float temp = 0;
    int T = TCalc(40,Frequency);
    float V = VCalc(Amplitude);
    while(1)
    {
        for(int a = 50; a < V; a += 5)
        {
            temp = (float)a / 100;
            _WaveForm = temp;
            wait_us(T);
            if(!_ext.read())
                return true;
        }
        for(int b = 50; b > V - 50; b -= 5)
        {
            temp = (float)b / 100;
            _WaveForm = temp;
            wait_us(T);
            if(!_ext.read())
                return true;
        }    
    }
}