need help for lpc2148 coding

I want to generate 50hz sine wave using arm 7(lpc2148) .i hv code for sine wave.but dnt knw how to generate sine wave of particular frequency.plz help me..its urgent

plz tell me ,c code to transmit measured sample data of sinewave on serial port(using hyperterminal)
I want code for keil (lpc2148)

I need program to store measured sampled data of sine wave in EEPROM.

I have done code for traingular wave generation using lpc2148 but it gives me error.plz check this n tell me.(i hv done coding in eclipse).


#include "includes.h"

OS_STK TestTask1Stack[200];
void TestTask1(void *pdata);

OS_STK TestTask2Stack[200];
void TestTask2(void *pdata);

int main (void)
{
unsigned int a,b;
PINSEL1=0X00200000;


OSInit();
OSTaskCreate(TestTask1, (void *)0, &TestTask1Stack[199], 0);
OSStart();
return 0;
}



void TestTask1(void *pdata)
{
unsigned int a,i=0;
PINSEL1=0X00200000;
while(1)
{
if(a!=0xff)
{
DACR=int(i)<<6;
}
elseif(a!=0x00)
{
DACR=int(i)<<6;
}
}
}