DIY 51单片机 ADC0809 示波器

1、通过对两个单片机的控制实现电压信号的采集以及显示波形，可以调整显示频率.主单片机控制12864的显示，从单片机实现对ADC0809的驱动转换.下面是该系统的程序：主单片机：#include<reg51.h>#include<math.h>#define uchar unsigned char #define uint unsigned int#define dataIO P1#define ADdataIO P0unsigned char p=0xf7,0xfb,0xfd,0xfe;int num;static int count=20;sbit RS=P25;sbit

2、 RW=P24;sbit E=P23;sbit PSB=P22;sbit NC=P21;sbit BF=P17;sbit EOC=P34;sbit EN=P35;static unsigned char DATA128=0;void delay(long int x)long int i;for(i=0;i<x;i+);void checkbusy()RS=0;RW=1;E=1;while(BF);E=0;void transfer(uchar word ,bit a ,bit b)      /数据交换, a:1数据, 0指令 

3、;  b:1读，0写。/checkbusy();RS=a;RW=b;E=1;dataIO = word;delay(2);E=0;RS=RS;RW=RW;uchar readRAM(bit a)/a:1.data 2.cmd/uchar x;checkbusy();dataIO=0xff;RS=a;RW=1;E=1;delay(2);x=dataIO;delay(2);E=0;RS=RS;RW=RW;return(x);void clear()transfer(0x01,0,0);delay(10);void LCDstatus(uchar a)checkbusy();transfe

4、r(a,0,0);void clr()unsigned char x,y,i;checkbusy();transfer(0x36,0,0);for(i=0;i<9;i+=8)for(x=0;x<32;x+)for(y=0;y<16;y+)transfer(x+0x80,0,0);transfer(y+0x80+i,0,0);transfer(0x00,1,0);transfer(0x00,1,0);void Point(unsigned char x,unsigned char y) char x_real,y_real,data_H,data_L, Memory_H,Mem

5、ory_L;if(x>=128|y>=64);else   if(y<32)      x_real=x/16+0x80;   y_real=0x80+y;      else      x_real=x/16+0x88;   y_real=0x80+y%32;      if(x%16<8)      data_

6、H=(0x01<<(7-x%16);   data_L=0;      else      data_H=0;   data_L=(0x01<<(15-x%16);   checkbusy();transfer(0x36,0,0);transfer(y_real,0,0);transfer(x_real,0,0);transfer(0x34,0,0);transfer(0x30,0,0);checkbusy();readRAM(1)

7、;Memory_H=readRAM(1);Memory_L=readRAM(1);checkbusy();data_H=data_H|Memory_H;data_L=data_L|Memory_L;checkbusy();transfer(0x36,0,0);transfer(y_real,0,0);transfer(x_real,0,0);transfer(data_H,1,0);transfer(data_L,1,0);void reset()delay(2000);   transfer(0x30,0,0);   delay(50); &

8、#160;           /选择基本指令集   transfer(0x30,0,0);       /选择8bit数据流   delay(20);   transfer(0x0c,0,0);       /开显示(无游标、不反白)   delay(20);   transf

9、er(0x01,0,0);       /清除显示，并且设定地址指针为00H   delay(500);   transfer(0x06,0,0);       /指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位   delay(0);void enterdata(char * word)while(*word!='0')transfer(*word,1,0);word+;delay(10

10、);void line(uchar x0,uchar y0,uchar x1,uchar y1)char temp;char dx,dy;               /定义起点到终点的横、纵坐标增加值char s1,s2,status,i;uchar Dx,Dy;int sub;dx=x1-x0;if(dx>=0)           &#

11、160;     /X的方向是增加的 s1=1;Dx=dx;else                     /X的方向是降低的 s1=-1;     Dx=-dx;dy=y1-y0;            &

12、#160;    /判断Y的方向是增加还是降到的if(dy>=0)s2=1;Dy=dy;elses2=-1;Dy=-dy;/* Dx=fabs(x1-x0);             /计算横、纵标志增加值的绝对值Dy=fabs(y1-y0);*/if(Dy>Dx)              &#

13、160;  /                                    /以45度角为分界线，靠进Y轴是status=1,靠近X轴是status=0 temp=Dx;Dx=Dy;Dy=temp;status=1; elsestatus=

14、0;/*Bresenham算法画任意两点间的直线*/ sub=2*Dy-Dx;                 /第1次判断下个点的位置for(i=0;i<Dx;i+)     Point(x0,y0);           /画点     if(sub>=0)

15、60;                                      if(status=1)            

16、   /在靠近Y轴区，x值加1      x0+=s1;     else                     /在靠近X轴区，y值加1             &#

17、160;       y0+=s2;     sub-=2*Dx;                 /判断下下个点的位置         if(status=1)y0+=s2;     else       &

18、#160;   x0+=s1;     sub+=2*Dy;         main()unsigned char x,x_m,y_m,i;TCON=0x05;IE=0x85;reset();clr();EOC=0;while(1)x_m=0;for(x=0;x<128;)if(EOC=1);EN=1;DATAx+=ADdataIO;EN=0; i=0;while(i<=count)i+;y_m=DATA0/4;for(x=0;x<128;x+)   line(x_m,y_m,x,DATAx/4);   x_m = x;   y_m = DATAx/4;clr();void stop() interrupt 0          /*用两个外部中断实现对频率的控制*/count-;delay(100);void stop1() interrupt 2count+;delay(100);从单片机程序：#include<reg51.h>sbi