File content as of revision 0:5737b1972549:

/*This is a program to output a sinwave in 12 bits 
Digital to Analog converter MCP4922. Sampling frequency is 
166,667Hz and produce an interrupt of Ticker every 6uS. 
The Program calculates the data of the signature wave beforehand.
*/
#include "mbed.h"
#include "TextLCD.h"
#include "MCP4922.h"

MCP4922 MCP(p5, p7,p8);  // MOSI, SCLK, CS
TextLCD lcd(p24, p26, p27, p28, p29, p30);
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]);
        index++;
        if(index >= Maxindex) index = 0;
}

/**** Main Function  ***/
int main(void) {
        MCP.frequency(20000000);

        lcd.cls();
        lcd.printf("MCP4922 Sinewave");

        Fsample = 166667;
        Freq   = 1000;
        GenWave();

        sampling.attach_us(&timer_int, 6); 
        while(1){
        }
}