#include "mbed.h"
#include "MCP4922.h"

MCP4922 MCP(PB_5,PB_3,PA_8); // MOSI, SCLK, CS
AnalogIn analogin(PC_5);
Ticker sampling;
#define PI             3.141593
#define MaxRes         800
/// Global Variables
unsigned int           OutData[MaxRes];
unsigned int           Maxindex;
unsigned long          Fsample;
unsigned long          Freq;
unsigned int           index = 0;
void GenWave(void) {
        unsigned int i;
        Maxindex = (int) (Fsample / Freq);
        if(Maxindex > MaxRes) {
                Fsample = Freq * MaxRes;
                     Maxindex = MaxRes;
        }
        for(i=0; i<Maxindex; i++) {
                OutData[i] =  (int)(0x1FF * (1+ sin((2*PI*Freq*i)/Fsample))/2);}}
void timer_int(){
        /// Output to D/A Converter
    MCP.writeA(OutData[index]);
        float value=analogin.read();
        printf("%f\n", value);
          index++;
        if(index >= Maxindex) index = 0;
}       
/**** Main Function  ***/
 
int main(void) {
   unsigned int count=0; 
        MCP.frequency(2000000);
      Fsample = 166667;
        Freq   = 1000;
        
        GenWave();
  //      sampling.attach_us(&timer_int, 60);
   while(1){
       }}