信号发生器 (正弦波,方波,三角波)51单片机 C语言代码

/**************************************/

/* 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,

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};

void delay(uchar z) //延时函数

{

uchar x,y;

for(x=0;x<110;x++)

for(y=z;y>0;y--);

}

void prepare() //tlc5615的初始化

{

cs=1;

din=1;

clk=0;

cs=0; //cs的上升沿和下降沿必须在clk 为低时进?

}

/* 用中断来产生方波

void Squtranslator()

{

TR1=1; //启动定时器1 控制高低电平的持续时间占空比

do{

do{

_wave=0;

}while((!flagsqu) && flag==1);//如果一旦终止信号的

//产生可以立马退出循环flagsqu=0;

do{

_wave=1;

}while((!flagsqu) && flag==1);

flagsqu=0;

}while(flag);

flag=1;

TR1=0;

}

*/

void Squtranslator() //方波函数

{

uchar j;

uchar dat1=0x7f;

while(flag)

{

do{

prepare();

dat=dat1;

for(j=0;j<12;j++)

{

din=(bit)(dat>>7); //将数据的最高位赋给din

clk=1;

dat=dat<<1; //一位位的传输

clk=0;

}

cs=1; //cs的上升沿和下降沿必须在clk 为低时进行

delay(200); //使高低电平持续一段时间

if(dat1==0)

dat1=0x7f; //完成了0和0x7f之间的替换else

dat1=0;

}while(flag);

}

}

void Tratranslator() //锯齿波的发生函数

{

uchar j;

uchar dat1=0x7f;

while(flag)

{

do{

prepare();

dat=dat1;

for(j=0;j<12;j++)

{

din=(bit)(dat>>7); //将数据的最高位赋给din

clk=1;

dat=dat<<1; //一位位的传输

clk=0;

}

cs=1; //cs的上升沿和下降沿必须在clk 为低时进行

delay(2); //稍加延时

dat1--;

}while(flag && dat1); //一旦有终止信号就可以停止

do{