单片机简易数字示波器仿真+源程序+电路原理图 -

#include <AT89X52.h>
#include <intrins.h>
//12864控制引脚定义
sbit DI = P2 ^ 2; //数据\指令选择引脚
sbit RW = P2 ^ 1; //读\写选择引脚
sbit E= P2 ^ 0; //读\写使能引脚
sbit CS1 = P2 ^ 4; //片选1引脚
sbit CS2 = P2 ^ 3; //片选2引脚
sbit BUSY= P1 ^ 7; //忙标志位
//按键控制定义
sbit Y1 = P3 ^ 0;
sbit Y2 = P3 ^ 1;
sbit X1 = P3 ^ 3;
sbit X2 = P3 ^ 7;
//ADC0832控制引脚
sbit START=P3^4;
sbit OE=P3^6;
sbit EOC=P3^5;
unsigned int ADdata; //AD采集值
unsigned int Ldata;
unsigned char ye,lei,shu;
unsigned char ADViewdata[91]; //AD显示数据存储区
char code FrameData[]={ //提示字符存储区
0x00,0x00,0x3F,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFE,0x01,0x00,
0x01,0x00,0x11,0x10,0x11,0x08,0x21,0x04,0x41,0x02,0x81,0x02,0x05,0x00,0x02,0x00, //示
0x00,0x20,0x20,0x20,0x10,0x20,0x13,0xFE,0x82,0x22,0x42,0x24,0x4A,0x20,0x0B,0xFC,
0x12,0x84,0x12,0x88,0xE2,0x48,0x22,0x50,0x22,0x20,0x24,0x50,0x24,0x88,0x09,0x06, //波
0x00,0x00,0x3E,0x7C,0x22,0x44,0x22,0x44,0x3E,0x7C,0x01,0x20,0x01,0x10,0xFF,0xFE,
0x02,0x80,0x0C,0x60,0x30,0x18,0xC0,0x06,0x3E,0x7C,0x22,0x44,0x22,0x44,0x3E,0x7C, //器
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //" "
};
//AD转换软件
void ADCChage()
{
START=1;
START=0;
while(EOC==0) //等待转换完成
{
OE=1;
}
ADdata = P0; //读取AD数据
OE=0;
}
//检查12864液晶状态
void CheckState()
{
DI=0;
RW=1;
do
{
E=1;
E=0;
//仅当第7位为0时才可操作(判别busy信号)
}while(BUSY==1);
}
//向12864写入一个字节的命令
void WriteCommand(unsigned char cmd)
{
CheckState(); //检查当前的12864状态
DI = 0;
RW = 0;
P1 = cmd; //送出相应的命令
E = 1;
E = 0;
}
//向12864写入一个字节的数据
void WriteData(unsigned char dat)
{
CheckState(); //检查当前的12864状态
DI = 1;
RW = 0;
P1 = dat; //送出相应的数据
E = 1;
E = 0;
}
//12864液晶的选择控制引脚
void LCMCSControl(unsigned int csl)
{
if(csl==1) //根据参数不同判断当前的12864控制引脚状态
{
CS1=0,
CS2=1;
}
if(csl==2)
{
CS1=1,
CS2=0;
}
if(csl==3)
{
CS1=0,
CS2=0;
}
}
//12864显示函数
void LCMView()
{
LCMCSControl(Ldata); //先发送控制命令
WriteCommand(ye);
WriteCommand(lei);
WriteData(shu); //然后发送数据
}
//12864的清屏函数
void CleanScreen()
{
unsigned char page,i;
LCMCSControl(3);
for(page=0xb8;page<=0xbf;page++)
{
WriteCommand(page);
WriteCommand(0x40);
for(i=0;i<64;i++)
{
WriteData(0x00);
}
}
LCMCSControl(1);
lei=0x40;
for(ye=0xb8;ye<0xbf;ye++)
{
shu=0xff;
LCMView();
}
ye=0xb8;
for(lei=0x40;lei<=0x7f;lei++)
{
shu=0x80;
LCMView();
}
ye=0xbf;
for(lei=0x40;lei<=0x7f;lei++)
{
shu=0x01;
LCMView();
}
LCMCSControl(2);
ye=0xb8;
for(lei=0x40;lei<=0x5b;lei++)
{
shu=0x80;
LCMView();
}
ye=0xbf;
for(lei=0x40;lei<=0x5b;lei++)
{
shu=0x01;
LCMView();
}
lei=0x5b;
for(ye=0xb9;ye<=0xbe;ye++)
{
shu=0xff;
LCMView();
}
}
//12864的初始化函数
void InitLCM(void)
{
WriteCommand(0xc0);
WriteCommand(0x3f);
}
//50us的延时函数
void Delay50us(unsigned int t)
{
unsigned char j;
for(;t>0;t--)
for(j=19;j>0;j--);
}
//刷新12864液晶
void RefreshLCM()
{
unsigned char i;
for(i=0xb9;i<=0xbe;i++)
{
ye=i;
shu=0x00;
LCMView();
}
}
//主函数
void main()
{
unsigned int r,j,q,k;
unsigned int Xaxis =0;
unsigned int Yaxis = 1;
unsigned char l;
unsigned char d1,d2,d3,d4,d5;
CleanScreen();
InitLCM();
LCMCSControl(2);
l=0xb8;
for(k=0;k<4;k++,l=l+0x02) //首先显示右侧的提示
{
ye=l;
lei=0x70;
for(r=0;r<16;r++)
{
shu=FrameData[2*r+1+32*k];
LCMView();
lei++;
}
ye=l+0x01;
lei=0x70;
for(r=0;r<16;r++)
{
shu=FrameData[2*r+32*k];
LCMView();
lei++;
}
}
while(1)
{
while(X2==0) //调节X轴
{
while(X2==0);
Xaxis = Xaxis + 1;
}
while(X1==0)
{
while(X1==0);
if(Xaxis!=0)
{
Xaxis = Xaxis - 1;
}
}
while(Y1==0) //调节Y轴
{
while(Y1==0);
Yaxis = Yaxis + 1;
}
while(Y2==0)
{
while(Y2==0);
if(Yaxis!=1)
{
Yaxis=Yaxis-1;
}
}
for(j=0;j<90;j++) //AD采样最大值
{
ADCChage();
ADViewdata[j]=ADdata;
if(ADViewdata[j]>ADViewdata[91])
{
ADViewdata[91]=ADViewdata[j];
}
Delay50us(Xaxis);
}
while(ADdata!=ADViewdata[91]) //如果采集值不相等，则继续
{
ADCChage();
}
for(j=0;j<90;j++) //连续采样90次
{
ADCChage();
ADViewdata[j]=ADdata;
Delay50us(Xaxis);
}
lei=0x41;
for(r=0,j=0;r<90;r++,j++)
{
if(j<63)
{
Ldata=1;
}
if(j==63)
{
lei=0x40;
}
if(j>=63)
{
Ldata=2;
}
RefreshLCM(); //刷新当前显示
if(ADViewdata[j>=127])//正电压
{
ADdata=(ADViewdata[j]-127)*0.196/Yaxis; //计算电压值
if(ADdata<=7)
{
ye=0xbb;
shu=(0x80>>ADdata);
}
else if(ADdata<=15)
{
ye=0xba;
shu=(0x80>>(ADdata-8));
}
else if(ADdata<=23)
{
ye=0xb9;
shu=(0x80>>(ADdata-16));
}
else if(ADdata<=31)
{
ye=0xb9;
shu=(0x80>>(ADdata-24));
}
}
if(ADViewdata[j]<127) //负电压
{
ADdata=(127-ADViewdata[j])*0.196/Yaxis; //计算电压值
if(ADdata<=7)
{
ye=0xbc;
shu=(0x01<<(ADdata));
}
else if(ADdata<=15)
{
ye=0xbd;
shu=(0x01<<(ADdata-8));
}
else if(ADdata<=23)
{
ye=0xbe;
shu=(0x01<<(ADdata-16));
}
else if(ADdata<=31)
{
ye=0xbe;
shu=(0x01<<(ADdata-24));
}
}
if(r==0)//判断正负
{
d1=shu;
d2=ye;
}
if(r!=0)
{
d3=shu;
d4=ye;
if(ye==d2) //如果相等，则判断是否显示完成
{
if(shu>d1)
{
d5=shu;
d5=d5>>1;
while(d5!=d1)
{
d5=d5>>1;
shu=shu|(shu>>1);
}
}
if(shu<d1)
{
d5=shu;
d5=d5<<1;
while(d5!=d1)
{
d5=d5<<1;
shu=shu|(shu<<1);
}
}
}
if(ye<d2)
{
for(q=0;q<7;q++)
{
shu=shu|(shu<<1);
}
LCMView();
ye++;
while(ye<d2)
{
shu=0xff;
LCMView();
ye++;
}
if(ye==d2)
{
shu=0x01;
if(shu<d1)
{
d5=shu;
d5=d5<<1;
while(d5!=d1)
{
d5=d5<<1;
shu=shu|(shu<<1);
}
}
}
}
if(ye>d2)
{
for(q=0;q<7;q++)
{
shu=shu|(shu>>1);
}
LCMView();
ye--;
while(ye>d2) {shu=0xff,LCMView(),ye--;}
if(ye==d2)
{
shu=0x80;
if(shu>d1)
{
d5=shu;
d5=d5>>1;
while(d5!=d1)
{
d5=d5>>1;
shu=shu|(shu>>1);
}
}
}
}
}
if(r!=0)
{
d1=d3;
d2=d4;
}
LCMView();
if(lei!=0x7f)
{
lei++;
}
}
}
}

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