单片机课程设计产生三角波正弦波方波剖析.docx

1、单片机课程设计产生三角波正弦波方波剖析STC89C51单片机产生正弦波、方波、三角波LED显示频率源程序#include #include#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;/ 显示段码值09unsign

2、ed 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=P11;sbit sd

3、a=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, 89,90,90,91,92,93,94,95,95,96,96,97,97,

4、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, 34,33,32,30,29,27,26,24,23,22,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,5,4,4,3,2,2,

5、 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() ; void delay1

6、(uchar x) uchar a,b; for(a=x;a0;a-) for(b=110;b0;b-);void Delay2(unsigned int t) while(-t);void Display() uchar i; for(i=0;i4;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; /取显示数据，段码 LATCH1=1; /段锁存 L

7、ATCH1=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)&(i

8、250)i+; scl1=0; delay();void write_byte1(uchar date) uchar i,temp; temp=date; for(i=0;i8;i+) temp=temp1; 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;i8;i+) scl1=1; delay(); k=(k1)|sda1; s

9、cl1=0; delay(); return k;void write_add1(uchar date) /写入DA start1(); 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|addres

10、s); 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

11、() /开始信号 sda=1; delay(); scl=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)&(i250)i+; scl=0; delay();void init() sda=1; delay(); scl=1; delay();void write_byte(uchar date) uchar i,temp; temp=date; for

12、(i=0;i8;i+) temp=temp1; scl=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;i8;i+) scl=1; delay(); k=(k1)|sda; scl=0; delay(); return k;void write_add(uchar date,uchar address ) uchar i,*pdate; pdate=dat

13、e; for(i=0;i2;i+) start(); write_byte(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;i2;i+) start(); write_byte(0xae); respons(); write_byte(address+i); respons(); start(); wr

14、ite_byte(0xaf); respons(); *(pdate+i)=read_byte(); stop(); void sj() if(l=100&m0) write_add1(m); m-; if(l=100&m=0) l=0; m=100; p5=0;p6=1;p7=1;void zx() if(l=200) l=0; p6=0;p7=1;p5=1; void fb() if(l=100&n=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=

15、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1 TH1=0xfd; TL1=0xfd; TR1=1; REN=1; SM0=0; SM1=1; EA=1; ES=1; init(); init1(); for(i=0;i5;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;i5;i+) n

16、um=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; temp10=voltage/100; temp11=(voltage%100)/10; temp12=voltage%1000; Display(); void ser() interrupt 4 RI=0; sign=SBUF;void T0_time() interrupt 1 ad=(uint)read_add1(0)*100; TH0=(65536-ad)/256; TL0=(65536-ad)%256;if(sign=1) sj();if(sign=2) zx();if(sign=3) fb();