1、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 intsbit cs=P20; /tlc5615片选端口sbit clk=P21; /tlc5615时钟线sbit din=P22; /tlc5615传输端口sbit key1=P10; sbit key2=P11; /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 flagsq
2、u; /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 tosin141= /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
3、,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, 0x48,0x4
4、5,0x43,0x40,0x3d,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;x0;y-);void prepare() /tlc5615的初始化 cs=1; din=1; clk=0;
5、 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;
6、while(flag) do prepare(); dat=dat1; for(j=0;j7); /将数据的最高位赋给din clk=1; dat=dat1; /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=
7、dat1; for(j=0;j7); /将数据的最高位赋给din clk=1; dat=dat1; /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 prepare(); dat=dat1; for(j=0;j7); /将数据的最高位赋给din clk=1; dat=dat1; /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 & (
8、!(dat1=0x7f); void Sintranslator(uchar wave,uchar num )/正弦波的转换函数 uchar i,j; uchar dat1; do for(i=0;inum;i+) prepare(); dat1=wavei; /打开片选 开始工作 for(j=0;j7); /将数据的最高位赋给din clk=1; dat1=dat11; /一位位的传输 clk=0; if(flag=0)break; cs=1; /cs的上升沿和下降沿必须在clk为低时进行 delay(1); /稍加延时 if(flag=0)break; while(flag); /等待控制
9、键的暂停void keyscan() /切换功能按键返回键值函数 uchar i; for(i=0;i4;i+) if(key1=0) delay(10); if(key1=0) keydat+; dowhile(!key1); /松手检测 if(keydat=4)keydat=1;/加满回零处理 void keycountrl() /切断输出控制函数 if(key2=0) delay(10); if(key2=0) flag=0; dowhile(!key2); /松手检测 void main () uchar temp; TMOD=0x01; /确定定时器的工作方式 TH0=(65536-
10、50000)/256; /给定时器0赋予初值 TL0=(65536-50000)%256; EA=1; /开总中断 ET0=1; /开启定时器0中断 TR0=1; while(1) do switch(keydat) case 1: flag=1;doSintranslator(tosin,141);while(flag);break; case 2: flag=1;doTratranslator();while(flag);break; case 3: flag=1;doSqutranslator();while(flag);break; default:break; while(flag); temp=keydat; /装载键值 while(keydat=temp); /在这里等待键值的改变 void Time0() interrupt 1 TH0=(65536-50000)/256; /定时器0用来扫描按键不断地扫描d TL0=(65536-50000)%256; num+; if(num=4) keyscan(); keycountrl(); num=0;
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