急求！！！在c51单片机上的三角波信号发生器，求原理图与c程序代码.

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/* 信号发生器 （正弦波，方波，三角波）
*/
/*************************************/ #include #include #define uchar unsigned char #define uint unsigned int
sbit cs=P2^0; //tlc5615片选端口 sbit clk=P2^1; //tlc5615时钟线 sbit din=P2^2;
//tlc5615传输端口

sbit key1=P1^0; sbit key2=P1^1;
//按键的单片机接口

uchar keydat;
uchar flag;

//波形发生终止信号的标志位 一旦
被置零立马停止发信号
uchar flagsqu; //方波高低电平控制为（运用定时器1
中断控制）

uchar m,num; uchar dat=0xff;
uchar code tosin[141]={ //正弦波的编码
0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08, 0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,涂料加盟0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b, 0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45, 0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63, 0x66,0x69,0x6c,0x6f,0x70,0x71,0x72,0x73,0x74,0x75, 0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7e, 0x7f,0x80,0x7f,0x7e,0x7e,0x7d,0x7c,0x7b,0x7a,0x79, 0x78,0x77,0x76,0x75,0x74,0x73,0x72,0x6f,0x6c,0x69, 0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c, 0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30, 0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a, 0x18,0x16,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a, 0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,
0x00};