Diff: WaveGen.cpp

Revision:

0:c1150498cbe9

Child:

1:cb84b066ab29

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WaveGen.cpp	Fri Jul 24 13:38:10 2015 +0000
@@ -0,0 +1,146 @@
+#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;
+        }    
+    }
+}