51单片机简单示波器带LM393迟滞比较器与12864显示波形附源码 -

#include <stdio.h>
#include <intrins.h>
#include "ADC.h"
#include "PCA.h"
#include "Chars.h"
#include "EEPROM.h"
#include "LCD12864.h"
#include "STC12C5A60S2.h"
//时间/每格3-10ms 4-5ms 5-2ms 6-1ms 7-500us 8-200us 9-100us 10-50us 11-20us 12-10us
unsigned char timpd;
unsigned char volpd; //示波器电压/每格 1--1V/d，2--0.5V/d，3--0.2V/d
unsigned long freqin; //示波器输入的信号频率,单位Hz
unsigned int T1count; //T1定时器，频率计数
unsigned int PCA0loop; //PCA0循环初值
unsigned int PCA1loop; //PCA1循环初值
unsigned int PCA0count; //PCA0计时累计
unsigned int PCA1count; //PCA1循环递增值，即输出方波周期/2.5
unsigned int samptime; //采样时间，即定时器0的初值
unsigned int T0count; //定时器采样时间间隔计数
unsigned int index; //每次采样的wave0数组下标
unsigned int shiftindex; //移位时数组下标位置
unsigned char hold; //hold键标志位
unsigned char autotim; //是否根据频率自动选择时间每格，是=1，否=其它
unsigned char shift; //hold状态移位标志位。1、左移；2、右移
//unsigned char grid; //点格样式
unsigned char shap; //波形失真修正，上下轮流显示
unsigned char ROMEN; //需要写EEPROM时=0x55;不需要=其它
unsigned char EEPROM[5]; //四字节掉电保存数据，点格样式，时间/每格,电压/每格,波形样式,自动选时间档
unsigned char idata wave[127]; //当前显示数组
unsigned char xdata wave0[512]; //采样数组，处于不断更新状态
unsigned char xdata wavep[512]; //显示及HOLD缓存数组
//******************************************************************//
//小于100us/div(50/20/10)采用直接采样，软件延时
//大于等于100us/div采用定时器采样
//******************************************************************//
void main(void)
{
unsigned char disp; //disp显示刷新标志位
unsigned char grid; //点格样式
unsigned char wavemode; //波形样式
// unsigned char volmax;
unsigned int i,j;
unsigned int delaybtn; //按键消抖延时
unsigned long int delay,delaymin,freqauto;
disp=0;
freqin=0;
autotim=0; //默认设置,手动
timpd=8; //默认设置200us/div
volpd=1; //默认设置1V/div
index=0; //赋值0非常重要
shiftindex=0;
T0count=0;
T1count=0;
PCA0loop=50000; //PCA0定时20ms //不分频时PCA0loop=62500; 480个周期1s
PCA0count=0;
//PCA1loop=15000; //PCA1(P1.4)输出500Hz方波(产生LCD负压),本程序没开启
//PCA1count=15000;
hold=0;
shift=0;
grid=1; //默认设置，坐标线
wavemode=1; //默认设置，粗线；=2细线
samptime=0xfee3; //精确延时100us,此值严禁任何改动samptime=0xfee2;
EEPROM[0]=grid;
EEPROM[1]=timpd;
EEPROM[2]=volpd;
EEPROM[3]=wavemode;
EEPROM[4]=autotim;
ROMEN=0x55; //临时测试，正式必须=0；
//M1/M0：00弱上拉，01强推挽，10输入（高阻），11开漏
P0M1=0x00;P0M0=0x00; //
P1M1=0xee;P1M0=0x11; //P1.0/P1.4推挽输出，其余设为输入
P2M1=0x00;P2M0=0x00; //
P3M1=0x00;P3M0=0x00; //
init_st7565(); //12864初始化
dispchar16(1,8,16,7,HZ1); //开机LOGO
write_string8(3,16,"www.crystalradio.cn");
dispchar16(5,10,12,9,HZ2);
ADCinit();
timerinit();
PCAinit();
//for(i=500;i>0;i--)for(j=5000;j>0;j--); //延时1
IAPReadData(0,5,EEPROM); //读取上一次关机前最后的用户设置
if((EEPROM[0]>=0)&&(EEPROM[0]<=2)&&(EEPROM[1]>=3)&&(EEPROM[1]<=16)
&&(EEPROM[2]>=1)&&(EEPROM[2]<=4)&&(EEPROM[3]>=1)&&(EEPROM[3]<=2)&&(EEPROM[4]==0)||(EEPROM[4]==1))
{ //读取到合法设置则赋值，否则显示默认设置
grid=EEPROM[0];
timpd=EEPROM[1];
volpd=EEPROM[2];
wavemode=EEPROM[3];
autotim=EEPROM[4];
}
//for(i=500;i>0;i--)for(j=5000;j>0;j--); //延时2
disp_grid(grid); //显示网格
disp_osc_settings(); //显示示波器设置
while(1)
{
//---------------------1、采样-----------------------//
//按了HOLD键，采样继续，但不允许对wavep缓存数组更新
if(hold==0)
{
switch(timpd)
{
case 3:
case 4: //5ms/div
case 5: //2ms/div
case 6: //1ms/div
case 7: //500us/div
case 8: //200us/div
case 9: //100us/div
{
TR0=1;ET0=1;
if(index>=511)
{
for(i=0;i<512;i++)
{
wavep[i]=wave0[i];
}
index=0; //采样下一组数据
disp=1; //刷新标志置位
}
break;
}
case 10: //50us/div
{
TR0=0;ET0=0;
for(i=0;i<512;i++) //50us/div
{
wavep[i]=getADC(1);
_nop_();_nop_();
_nop_();_nop_();
}
disp=1; //刷新标志置位
break;
}
case 11: //20us(40us插值得来)
{
TR0=0;ET0=0;
fastADC();
for(i=0;i<512;i++) //赋值（包含插值运算）
{
if(!(i%2))
{wavep[i]=wave0[i/2];}
else
{wavep[i]=(unsigned int)(wave0[i/2]+wave0[i/2+1])/2;}
}
disp=1; //刷新标志置位
break;
}
case 12: //10us(40us两次插值得来)
{
TR0=0;ET0=0;
fastADC();
for(i=0;i<512;i++) //赋值（包含插值运算）
{
if(!(i%2))
{wavep[i]=wave0[i/2];}
else
{wavep[i]=(unsigned int)(wave0[i/2]+wave0[i/2+1])/2;}
}
for(i=0;i<512;i++) //赋值（包含插值运算）
{
wave0[i]=wavep[i];
}
for(i=0;i<512;i++) //赋值（包含插值运算）
{
if(!(i%2))
{wavep[i]=wave0[i/2];}
else
{wavep[i]=(unsigned int)(wave0[i/2]+wave0[i/2+1])/2;}
}
disp=1; //刷新标志置位
break;
}
}//switch(timpd)采样结束
}
//-------------------2-1：波形触发处理-----------------//
if((disp==1)&&(hold==0)) //接收到新数据且正常显示时才处理
{
for(i=2;i<127;i++)
{
if( (((signed int)wavep[i-2]-127)<=0)&&(((signed int)wavep[i-1]-127)<=0)//&&(((signed int)wavep[i]-127)<=0)
&&(((signed int)wavep[i+1]-127)>=0)&&(((signed int)wavep[i+2]-127)>=0)&&(((signed int)wavep[i+3]-127)>0) )
{
shiftindex=i;
break;
}
}
}//if((disp==1)&&(hold==0))波形触发处理结束
//-------------------2-2：HOLD状态移位处理-----------------//
if(hold==1)
{
if(shift==2) //左移
{
shiftindex=shiftindex+9;
if((shiftindex+126)>=512)
{
shiftindex=shiftindex-9;
}
}
if(shift==1) //右移
{
shiftindex=shiftindex-9; //注意无符号数
if(shiftindex>512) //相当于判断小于0
{
shiftindex=shiftindex+9;//防止无限递减
}
}
}
//-------------------3、电压衰减处理-----------------//
switch(volpd) //此部分余数计算可能有问题，需改进
{
case 1: //1v/div
{
for(i=0;i<127;i++)
{
if(((signed int)wavep[i+shiftindex]>=127))
{
if(((wavep[i+shiftindex]-127)*35/256)<128)
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/256+28;
else
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/256+29;
}
else
{
if(((127-wavep[i+shiftindex])*35/256)<128)
wave[i]=27-(unsigned int)(127-wavep[i+shiftindex])*35/256;
else
wave[i]=26-(unsigned int)(127-wavep[i+shiftindex])*35/256;
}
}
break;
}
case 2: //0.5v/div
{
for(i=0;i<127;i++)
{
if(((signed int)wavep[i+shiftindex]>=127))
{
if(((wavep[i+shiftindex]-127)*35/128)<64)
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/128+28;
else
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/128+29;
}
else
{
if(((127-wavep[i+shiftindex])*35/128)<64)
wave[i]=27-(unsigned int)(127-wavep[i+shiftindex])*35/128;
else
wave[i]=26-(unsigned int)(127-wavep[i+shiftindex])*35/128;
//注意要防止显示越界@@@@@@@@@@@@@@@@3（见LCD12864.c）
if(wave[i]>27)wave[i]=0; //防止超出LCD12864显示边界
}
}
break;
}
case 3: //0.2v/div
{
for(i=0;i<127;i++)
{
if(((signed int)wavep[i+shiftindex]>=127))
{
if(((wavep[i+shiftindex]-127)*35/51)<26)
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/51+28;
else
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/51+29;
//if(wave[i]>56)wave[i]=56;
}
else
{
if(((127-wavep[i+shiftindex])*35/51)<26)
wave[i]=27-(unsigned int)(127-wavep[i+shiftindex])*35/51;
else
wave[i]=26-(unsigned int)(127-wavep[i+shiftindex])*35/51;
if(wave[i]>27)wave[i]=0; //防止超出LCD12864显示边界
}
}
break;
}
case 4: //0.1v/div
{
for(i=0;i<127;i++)
{
if(((signed int)wavep[i+shiftindex]>=127))
{
if(((wavep[i+shiftindex]-127)*70/51)<26)
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*70/51+28;
else
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*70/51+29;
//if(wave[i]>56)wave[i]=56;
}
else
{
if(((127-wavep[i+shiftindex])*70/51)<26)
wave[i]=27-(unsigned int)(127-wavep[i+shiftindex])*70/51;
else
wave[i]=26-(unsigned int)(127-wavep[i+shiftindex])*70/51;
if(wave[i]>27)wave[i]=0; //防止超出LCD12864显示边界
}
}
break;
}
}//switch(volpd)电压衰减处理结束
//---------------------4、波形显示-------------------//
if((disp==1)&&(hold==0)) //正常显示
{
TR0=0;ET0=0; //刷新过程不允许中断
if(ROMEN==0x55)
{
EEPROM[0]=grid;
EEPROM[1]=timpd;
EEPROM[2]=volpd;
EEPROM[3]=wavemode;
EEPROM[4]=autotim;
IAPWriteData(0,5,EEPROM);
ROMEN=0;
}
if(wavemode==1){dispwave2(grid);} //矢量图
if(wavemode==2){dispwave(grid);} //散点图
if(autotim==1)write_string8(3,106,"Auto");
disp=0; //刷新标志清零
index=0; //刷新后重新采样
TR0=1;ET0=1;
}
if(hold==1) //HOLD状态的显示
{
if(wavemode==1){dispwave2(grid);} //矢量图
if(wavemode==2){dispwave(grid);} //散点图
if(autotim==1)write_string8(3,106,"Auto");
for(i=40;i>0;i--) //显示延时
{
for(j=1200;j>0;j--);
//if(P1&0x38)break; //有按键按下提前退出延时循环
}
}
//---------------5、按键处理及显示延时---------------//
shift=0; //按键处理前清移位标志位
if(wavemode==1) //矢量显示延时小
{
if(timpd==3){i=1;}
else if(timpd==4){i=2;}
else {i=30;}
}
if(wavemode==2) //散点显示延时大
{
if(timpd==3){i=1;}
else if(timpd==4){i=2;}
else {i=120;}
}
for(;i>0;i--) //散点显示刷新i=120
{
//不同采样率采用不同延时，以得到相同刷新率
switch(timpd)
{
case 3:{j=1;delaymin=180000;delaybtn=60000;break;} //10ms/div
case 4:{j=1;delaymin=140000;delaybtn=60000;break;} //5ms/div
case 5:{j=100;delaymin=120000;delaybtn=40000;break;} //2ms/div
case 6:{j=200;delaymin=120000;delaybtn=40000;break;} //1ms/div
case 7:{j=400;delaymin=90000;delaybtn=30000;break;} //500us/div
case 8:{j=200;delaymin=60000;delaybtn=20000;break;} //200us/div
case 9:{j=120;delaymin=30000;delaybtn=10000;break;} //100us/div
case 10:{j=1000;delaymin=250000;delaybtn=80000;break;} //50us/div
case 11:{j=1000;delaymin=250000;delaybtn=80000;break;} //20us(40us插值得来)
case 12:{j=1000;delaymin=250000;delaybtn=80000;break;} //10us(40us两次插值得来)
}
for(;j>0;j--); //内层循环延时
//--------按键处理--------//
//--1、HOLD键--//
if((P3&0x04)==0)
{
for(;delaybtn>0;delaybtn--);
if((P3&0x04)==0)
{
delay=0;
if(hold==1){delaymin*=3;}//hold模式定时器全关，按键检测加长延时
while((P3&0x04)==0)
{
delay++;
}
if(delay<delaymin)
{
if(hold==0){hold=1;TR0=0;ET0=0;}
else{hold=0;TR0=1;ET0=1;}
}
else
{
if(hold==0) //hold模式下不切换自动手动
{
if(autotim==1){autotim=0;}
else {autotim=1;}
ROMEN=0x55;
}
}
}
}
//--2、时间++/左移键--//
if((P3&0x08)==0)
{
if(hold==0) //正常显示，时间++
{
for(;delaybtn>0;delaybtn--);
if((P3&0x08)==0)
{
while((P3&0x08)==0);
index=0; //调整时间后必须重新采样
timpd--;
ROMEN=0x55;
if(timpd<3){timpd=12;}
}
}
if(hold==1) //HOLD状态，波形左移
{
for(j=50000;j>0;j--);
if((P3&0x08)==0)
{
shift=1;break;
}
}
}
//--3、时间--/右移键--//
if((P3&0x80)==0) //时间--
{
if(hold==0) //正常显示，时间++
{
for(;delaybtn>0;delaybtn--);
if((P3&0x80)==0)
{
while((P3&0x80)==0);
index=0;
timpd++;
ROMEN=0x55;
if(timpd>12)timpd=3;
}
}
if(hold==1) //HOLD状态，波形左移
{
for(j=50000;j>0;j--);
if((P3&0x80)==0)
{
shift=2;break;
}
}
}
//--4、//电压++--//
if((P3&0x40)==0) //电压++
{
for(;delaybtn>0;delaybtn--);
if((P3&0x40)==0)
{
while((P3&0x40)==0);
volpd++;
if(volpd>4)volpd=1;
if(hold==0){ROMEN=0x55;}
}
}
//--5、//电压----//
if((P3&0x10)==0) //电压--
{
for(;delaybtn>0;delaybtn--);
if((P3&0x10)==0)
{
while((P3&0x10)==0);
volpd--;
if(volpd<1)volpd=4;
if(hold==0){ROMEN=0x55;}
}
}
//--6、点格样式切换/线形切换--//
if((P1&0x80)==0) //点格样式切换
{
for(;delaybtn>0;delaybtn--);
if((P1&0x80)==0)
{
delay=0;
if(hold==1){delaymin*=3;}//hold模式定时器全关，按键检测加长延时
while((P1&0x80)==0)
{
delay++;
}
if(delay<delaymin)
{
grid++;
if(grid>3)grid=0;
if(hold==0){ROMEN=0x55;}
}
else
{
wavemode++;
if(wavemode>2)wavemode=1;
if(hold==0){ROMEN=0x55;}
}
}
}
}//for()按键处理end
//---------------6、根据频率自动选择采样时间---------------//
if(autotim==1)
{
if(freqauto==freqin)
{
if((freqin>5)&&(freqin<20)){timpd=3;}
else if((freqin>=20)&&(freqin<45)){timpd=4;}
else if((freqin>=45)&&(freqin<120)){timpd=5;}
else if((freqin>=120)&&(freqin<220)){timpd=6;}
else if((freqin>=220)&&(freqin<500)){timpd=7;}
else if((freqin>=500)&&(freqin<1200)){timpd=8;}
else if((freqin>=1200)&&(freqin<2200)){timpd=9;}
else if((freqin>=2200)&&(freqin<5000)){timpd=10;}
else if((freqin>=5000)&&(freqin<12000)){timpd=11;}
else if(freqin>=12000){timpd=12;}
}
else
{
freqauto=freqin;
}
//volmax=0;
//for(j=0;j<512;j++)
//{
// if(wavep[j]>volmax){volmax=wavep[i];}
//}
//if(volmax>187){volpd=1;}
//else if(volmax>151){volpd=2;}
//else if(volmax>135){volpd=3;}
//else if(volmax>127){volpd=4;}
}
}//while(1)-end
//*/
}
/*
//-------------------3、电压衰减处理-----------------//
switch(volpd) //此部分余数计算可能有问题，需改进
{
case 1: //1v/div
{
for(i=0;i<127;i++)
{
if(((signed int)wavep[i+shiftindex]>=127))
{
if(((wavep[i+shiftindex]-127)*35/256)<128)
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/256+28;
else
wave[i]=(unsigned int)(wavep[i+shiftindex]-127)*35/256+29;
}
else
{
if(((127-wavep[i+shiftindex])*35/256)<128)
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