单片机课程设计产生三角波、正弦波、方波

1、STC89C51单片机产生正弦波、方波、三角波LED显示频率源程序#include <stdio.h>#include<reg52.h>#define uchar unsigned char#define uint unsigned intsbit LATCH1=P26;/定义锁存使能端口 段锁存sbit LATCH2=P27;/ 位锁存unsigned char TempData8; /存储显示值的全局变量unsigned char code DuanMa10=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;/ 显示

2、段码值09unsigned char code DuanMa210=0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef;/ 显示段码值09unsigned char code DuanMa13=0x77,0x7c,0x39;unsigned char code WeiMa=0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f;/分别对应相应的数码管点亮,即位码#define DataPort P0sbit keyA=P33;sbit keyB=P34;sbit keyC=P35;sbit wc=P10;sbit scl=

3、P11;sbit sda=P12;sbit scl1=P13;sbit sda1=P14;sbit p5=P15;sbit p6=P16;sbit p7=P17;uint sign,ad;uchar temp10, temp13;/定义显示区域临时存储数组uchar voltage; /定义浮点变量uchar l=0,m=100,n=0;uchar code sin200 = 52,53,55,56,58,59,61,62,64,65,67,68,70,71,73,74,75,77,78,79,81,82,83,84,85,86,88, 89,90,90,91,92,93,94,95,95,9

4、6,96,97,97,98,98,98,99,99,99,99,100,100,100,100,100,99, 99,99,99,98,98,98,97,97,96,96,95,95,94,93,92,91,90,89,88,87,86,85,84,83,82,81,79,78, 77,75,74,73,71,70,68,67,65,64,62,61,59,58,56,55,53,52,50,48,47,45,44,42,41,39,38,36, 34,33,32,30,29,27,26,24,23,22,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,5

5、,4,4,3,2,2, 2,1,1,1,1,0,0,0,0,0,0,0,1,1,1,1,2,2,2,3,4,4,5,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19, 20,22,23,24,26,27,29,30,32,33,35,36,38,39,41,42,44,45,47,48,50;void DelayUs2x(unsigned char t) while(-t);void DelayMs(unsigned char t) while(t-) /大致延时1mS DelayUs2x(245); DelayUs2x(245); void delay() ;

6、void delay1(uchar x) uchar a,b;for(a=x;a>0;a-) for(b=110;b>0;b-);void Delay2(unsigned int t) while(-t);void Display() uchar i; for(i=0;i<4;i+) DataPort=WeiMai; /取位码 LATCH2=1; /位锁存 LATCH2=0; if(i=0) DataPort=DuanMa1sign-1; else if(i=1) DataPort=DuanMa2temp1i; else DataPort=DuanMatemp1i; /取显示

7、数据，段码 LATCH1=1; /段锁存 LATCH1=0; Delay2(500); / 扫描间隙延时，时间太长会闪烁，太短会造成重影 /pcf8591void init1()sda1=1;delay();scl1=1;delay();void start1() /开始信号sda1=1;delay();scl1=1;delay();sda1=0;delay();void stop1() /停止sda1=0;delay();scl1=1;delay();sda1=1;delay();void respons1() /应答uchar i;scl1=1;delay();while(sda1=1)&

8、amp;&(i<250)i+;scl1=0;delay();void write_byte1(uchar date)uchar i,temp;temp=date;for(i=0;i<8;i+)temp=temp<<1;scl1=0; delay();sda1=CY;delay();scl1=1;delay();scl1=0;delay();sda1=1;delay();uchar read_byte1()uchar i,k;scl1=0;delay();sda1=1;delay();for(i=0;i<8;i+)scl1=1;delay();k=(k<

9、;<1)|sda1;scl1=0;delay();return k;void write_add1(uchar date) /写入DAstart1();write_byte1(0x90);respons1();write_byte1(0x40);respons1();write_byte1(date);respons1(); / delay1(100);stop1();uchar read_add1( uchar address ) /读AD值uchar date;start1();write_byte1(0x90);respons1();write_byte1(0x40|address

10、);respons1();start1();write_byte1(0x91);respons1();date=read_byte1();stop1();return date;/键盘void keyscan()if(keyA=0)delay1(10);if(keyA=0)sign=1;while(!keyA); if(keyB=0)delay1(10);if(keyB=0)sign=2;while(!keyB);if(keyC=0)delay1(10);if(keyC=0)sign=3;while(!keyC);/eepromvoid start() /开始信号sda=1;delay();s

11、cl=1;delay();sda=0;delay();void stop() /停止sda=0;delay();scl=1;delay();sda=1;delay();void respons() /应答uchar i;scl=1;delay();while(sda=1)&&(i<250)i+;scl=0;delay();void init()sda=1;delay();scl=1;delay();void write_byte(uchar date)uchar i,temp;temp=date;for(i=0;i<8;i+)temp=temp<<1;s

12、cl=0; delay();sda=CY;delay();scl=1;delay();scl=0;delay();sda=1;delay();uchar read_byte()uchar i,k;scl=0;delay();sda=1;delay();for(i=0;i<8;i+)scl=1;delay();k=(k<<1)|sda;scl=0;delay();return k;void write_add(uchar date,uchar address )uchar i,*pdate;pdate=date;for(i=0;i<2;i+)start();write_b

13、yte(0xae);respons();write_byte(address+i);respons();write_byte(*(pdate+i);respons();stop();void read_add(uchar date ,uchar address )uchar i,*pdate; pdate=date;for(i=0;i<2;i+)start();write_byte(0xae);respons();write_byte(address+i);respons();start();write_byte(0xaf);respons();*(pdate+i)=read_byte(

14、);stop();void sj() if(l<100)write_add1(l);l+;if(l>=100&m>0)write_add1(m);m-;if(l>=100&m<=0)l=0;m=100;p5=0;p6=1;p7=1;void zx()if(l<200)write_add1(sinl);l+;if(l>=200) l=0;p6=0;p7=1;p5=1;void fb()if(l<100)write_add1(255);l+;if(l>=100&n<100)write_add1(0);n+;if(l

15、>=100&n>=100)l=0;n=0;p7=0;p5=1;p6=1;void main() uchar i,num,tab2;/定义显示区域临时存储数组 wc=0; num=0;tab0=0;tab1=0;TMOD=0x21;/设置定时器1为工作方式2定时器0为工作方式1TH1=0xfd;TL1=0xfd;TR1=1;REN=1;SM0=0;SM1=1;EA=1;ES=1;init();init1();for(i=0;i<5;i+)num=read_add1(0);read_add(tab,1);sign=tab0; ad=(uint)num*100;TH0=(65536-ad)/256; TL0=(65536-ad)%256; ET0=1; /定时器中断打开TR0=1; while(1) keyscan(); for(i=0;i<5;i+) num=read_add1(0); voltage=500/num; ad=(uint)num*100;tab0=sign;tab1=ad;write_add(tab,1);num=read_add1(0); voltage=500/num; temp