main.cpp

00001 #include "mbed.h"
00002 
00003 AnalogOut Aout(p18);
00004 AnalogIn Ain(p20);
00005 //AnalogIn Ain1(p19);
00006 //AnalogIn Ain2(p20);
00007 
00008 DigitalIn sw1(p7);
00009 DigitalIn sw2(p8);
00010 DigitalIn sw3(p9);
00011 DigitalIn sw4(p10);
00012 
00013 int main() {
00014     float A,T,f,Ts;//A=amplitude, T=period, f=frequency, Ts= sampling time
00015     const float PI=3.141592;
00016     int SinNumPoints=100;
00017     
00018     //with only one potenciometer
00019     while(1) {
00020         if (sw1==1){//mode1: amplitude control
00021             A=Ain;
00022             f=50000;
00023             T=1/f;
00024             Ts= T/SinNumPoints;
00025             for (int i=0;i<SinNumPoints;i++){
00026                 Aout=0.5+A/2*sin(2*PI*f*i*Ts);
00027                 wait(Ts);
00028         }else if(sw2==1){// mode2: period control
00029             A=1;
00030             f=50000*Ain;
00031             T=1/f;
00032             Ts= T/SinNumPoints;
00033             for (int i=0;i<SinNumPoints;i++){
00034                 Aout=0.5+A/2*sin(2*PI*f*i*Ts);
00035                 wait(Ts);
00036         }
00037             /* with 2 potenciometer to control simuntaneously both parameter, amplitude and frequency
00038             
00039             while(1){
00040                 A=Ain1;
00041                 f=50000*Ain2;(20ms)
00042                 T=1/f;
00043                 Ts=T/SinNumPoints;
00044                 for (int i=0;i<SinNumPoints;i++){
00045                     Aout=0.5+A/2*sin(2*PI*f*i*Ts);
00046                     wait(Ts);
00047                 }
00048             }
00049             
00050             */
00051     }
00052 
00053     }
00054 }