main.cpp

00001 #include "mbed.h"
00002 #include "PwmOutAny.h"
00003 
00004  Timer t;
00005 
00006  InterruptIn SquareIn (p22);
00007  DigitalOut status (LED1);
00008 
00009 
00010 
00011 PwmOutAny newPwm (p25,.0001,.50);
00012 
00013 void measure_Period()    // this is a test function it looks at a square wave on pin p22 and uses its freq. as the base freq. for the PWM.
00014 {
00015     static bool first = true;
00016     static float InputPeriod = .0001;
00017   static unsigned int count = 0;
00018     if(first)
00019     {
00020         t.reset();
00021         t.start();
00022         first = false;
00023     }
00024     else
00025     {
00026         
00027         InputPeriod = (InputPeriod + t.read())/2;
00028         newPwm.Set_Period(InputPeriod);
00029         status = ! status;
00030         t.reset();
00031         t.start();
00032         count++;
00033     }
00034     
00035 }
00036 
00037 
00038 int main()
00039     {
00040     
00041     SquareIn.rise(&measure_Period);
00042         
00043         while(1)
00044         {
00045     for(float t=0;t<=1;t+=.01)
00046             {
00047                 newPwm.Set_PulseWidth(t);
00048                 wait(.1);
00049             }
00050         for(float t=1;t>=0;t-=.01)
00051             {
00052                 newPwm.Set_PulseWidth(t);
00053                 wait(.1);
00054             }
00055 
00056             
00057         }
00058         
00059     }   
00060