見附件
仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
單片機(jī)源程序如下:
- #include<reg51.h>
- unsigned char a[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71},b[4],c=0x01;
- sbit START=P2^4;
- sbit OE=P2^6;
- sbit EOC=P2^5;
- sbit add_a=P2^2;
- sbit add_b=P2^1;
- sbit add_c=P2^0;
- sbit led=P2^7;
- sbit buzzer=P2^3;
- void Delay1ms(unsigned int count)
- {
- unsigned int i,j;
- for(i=0;i<count;i++)
- for(j=0;j<120;j++);
- }
- void show() //顯示函數(shù)
- {
- unsigned int r;
- for(r=0;r<4;r++)
- {
- P1=(c<<r);
- P3=b[r];
- if(r==2) //顯示小數(shù)點(diǎn)
- P3=P3|0x80;
- Delay1ms(1);
- }
- }
- void main(void)
- {
- unsigned int addata=0,i;
- while(1)
- { //采集第一路信號(hào)
- add_a=0;
- add_b=0;
- add_c=0;
- START=1;
- START=0;
- while(EOC==0)
- {
- OE=1;
- }
- addata=P0;
- if(addata>=0x40) //當(dāng)大于1.25v時(shí)，則使用LED和蜂鳴器報(bào)警
- {
- for(i=0;i<100;i++)
- {
- led=~led;
- buzzer=~buzzer;
- }
- led=1; //控制發(fā)光二極管D2閃爍，發(fā)出光報(bào)警信號(hào)
- buzzer=1; //控制蜂鳴器發(fā)聲，發(fā)出聲音報(bào)警信號(hào)
- }
- else //否則取消報(bào)警
- {
- led=0; //控制發(fā)光二極管D2滅
- buzzer=0; //控制蜂鳴器不發(fā)聲
- }
- addata=addata*1.96; //將采集的二進(jìn)制數(shù)轉(zhuǎn)換成可讀的電壓值
- OE=0;
- b[0]=a[addata%10];
- b[1]=a[addata/10%10];
- b[2]=a[addata/100%10];
- b[3]=a[addata/1000];
- for(i=0;i<=200;i++)
- {
- show();
- }
-
-
- add_a=1; //采集第二路信號(hào)
- add_b=0;
- add_c=0;
- START=1; //啟動(dòng)ADC0808開始轉(zhuǎn)換
- START=0;
- while(EOC==0)
- {
- OE=1;
- }
- addata=P0;
- if(addata>=0x80) //當(dāng)大于2.5v時(shí)，則使用LED和蜂鳴器報(bào)警
- {
- for(i=0;i<100;i++)
- {
- led=~led;
- buzzer=~buzzer;
- }
- led=1; //控制發(fā)光二極管D2閃爍，發(fā)出光報(bào)警信號(hào)
- buzzer=1; //控制蜂鳴器發(fā)聲，發(fā)出聲音報(bào)警信號(hào)
- }
- else //否則取消報(bào)警
- {
- led=0; //控制發(fā)光二極管D2滅
- buzzer=0; //控制蜂鳴器不發(fā)聲
- }
- addata=addata*1.96; //將采集的二進(jìn)制數(shù)轉(zhuǎn)換成可讀的電壓值
- OE=0;
- b[0]=a[addata%10];
- b[1]=a[addata/10%10];
- b[2]=a[addata/100%10];
- b[3]=a[addata/1000];
- for(i=0;i<=200;i++)
- {
- show();
- }
- }
- }
所有資料51hei提供下載:
源程序 仿真.rar
(93.63 KB, 下載次數(shù): 206)
2020-5-22 19:49 上傳
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