#include <reg52.h>
#include <absacc.h>
#include <math.h>

#define dac0832	XBYTE[0xa000]
#define	pi	3.14

unsigned char xdata am_arr[300];

void   am_wave(void)
{
	unsigned int i;
	for(i=0;i<300;i++)
	{
		am_arr[i]=(unsigned char)((127.5*sin(2*pi*(i/300.))+127.5)*cos(2*pi*10000.*i));
	}
}

void am_wave_send(void)
{
	unsigned int i;
	for(i=0;i<300;i++)
	{	
		dac0832=am_arr[i];
	}
}

void main(void)
{
	am_wave();
	while(1)
	{
		am_wave_send();
	}
}