#include?
#include?
?
#define?DA0832?P2
#define?DATA?57??????????//定時器延時?
?
#define?uchar?unsigned?char
#define?uint?unsigned?int
?
sbit?S1?=?P1^0;
sbit?S2?=?P1^1;
//00鋸齒波；01方波；10三角波；11正弦波
?
uchar?code?sin_tab[]?=????????//正弦波輸出表
{
?????0x800x830x860x890x8D0x900x930x960x990x9C0x9F0xA20xA50xA80xAB0xAE
?????0xB10xB40xB70xBA0xBC0xBF0xC20xC50xC70xCA0xCC0xCF0xD10xD40xD60xD8
?????0xDA0xDD0xDF0xE10xE30xE50xE70xE90xEA0xEC0xEE0xEF0xF10xF20xF40xF5
?????0xF60xF70xF80xF90xFA0xFB0xFC0xFD0xFD0xFE0xFF0xFF0xFF0xFF0xFF0xFF
?????0xFF0xFF0xFF0xFF0xFF0xFF0xFE0xFD0xFD0xFC0xFB0xFA0xF90xF80xF70xF6
?????0xF50xF40xF20xF10xEF0xEE0xEC0xEA0xE90xE70xE50xE30xE10xDF0xDD0xDA
?????0xD80xD60xD40xD10xCF0xCC0xCA0xC70xC50xC20xBF0xBC0xBA0xB70xB40xB1
?????0xAE0xAB0xA80xA50xA20x9F0x9C0x990x960x930x900x8D0x890x860x830x80
?????0x800x7C0x790x760x720x6F0x6C0x690x660x630x600x5D0x5A0x570x550x51
?????0x4E0x4C0x480x450x430x400x3D0x3A0x380x350x330x300x2E0x2B0x290x27
?????0x250x220x200x1E0x1C0x1A0x180x160x150x130x110x100x0E0x0D0x0B0x0A
?????0x090x080x070x060x050x040x030x020x020x010x000x000x000x000x000x00
?????0x000x000x000x000x000x000x010x020x020x030x040x050x060x070x080x09
?????0x0A0x0B0x0D0x0E0x100x110x130x150x160x180x1A0x1C0x1E0x200x220x25
?????0x270x290x2B0x2E0x300x330x350x380x3A0x3D0x400x430x450x480x4C0x4E
?????0x510x550x570x5A0x5D0x600x630x660x690x6C0x6F0x720x760x790x7C0x7E
};
?
void?stair（void）;//鋸齒波?
void?square（void）;//方波?
void?trian（）;//三角波?
void?sin（）;//正弦波?
void?scan（）;//掃描函數?
void?Timer0Init（void）;		//75微秒@11.0592MHz
uchar?flag?=?0;


void?main（）
{	
	P2?=?0xff;
	Timer0Init（）;
	while（1）
	{
	//逐個測試?
	//stair（）;		/*鋸齒波*/
	//	square（）;??/*方波*/
??//?trian（）;	/*三角波*/
	//	sin（）;??/*正弦波*/
????scan（）;
	}
}
?
void?Timer0Init（void）		//75微秒@11.0592MHz
{

	TMOD?=?0x01;		//設置定時器模式
	TH0??=?（65536?-?DATA）?/?256;		//設置定時初值
	TL0??=?（65536?-?DATA）?%?256;		//設置定時初值
	ET0??=?1;		????//TF0標志
	TR0??=?1;		????//定時器0開始計時
	EA???=?1;
}
void?timer0_ISR（void）?interrupt?1
{
	TH0??=?（65536?-?DATA）?/?256;		//設置定時初值
	TL0??=?（65536?-?DATA）?%?256;		//設置定時初值
	TR0??=?0;
	flag?=?1;
}


void?scan（）
{
	if（（0?==?S1）?&&（0?==?S2））
	????stair（）;
	else?if（（1?==?S1）?&&?（0?==?S2））
		square（）;
	else?if（（0?==?S1）?&&?（1?==?S2））
		trian（）;
	else
		sin（）;
		
}


void?stair（void）
{
	uchar?i;
	for（i?=?0?;i?	{
	??DA0832?=?i;
		TR0??=?1;
		while（flag?==?0）;
		flag?=?0;
	}
	?
}
?
void?square（void）
{
	int?i;
	DA0832?=?0xff;
	for（i?=?0;i?	{
		TR0??=?1;
		while（flag?==?0）;
		flag?=?0;		
	}
	DA0832?=?0x00;
	for（i?=?0;i?	{
		TR0??=?1;
		while（flag?==?0）;
		flag?=?0;		
	}
}
?
void?trian（void）
{
	uchar?i;
	for（i?=?0?;i?