下面是RLC電阻電容電感測量儀的仿真原理圖：
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2016-9-25 12:48 上傳
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仿真工程文件及源程序下載：
RLC測量儀.rar
(71.66 KB, 下載次數: 717)
2016-9-25 12:49 上傳
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這個簡單的萬用表采用單片機控制，用lcd1602顯示屏來顯示.下面是部分源程序預覽：
- #include<reg52.h>
- #include<intrins.h>
- #define uchar unsigned char
- #define uint unsigned int
- sbit RS=P2^6;
- sbit RW=P2^5;
- sbit E=P2^7;
- sbit R=P1^0;
- sbit C=P1^1;
- sbit L=P1^2;
- sbit A1=P1^3;
- sbit A0=P1^4;
- #define LCD_data P0
- uchar code table1[10]={"R= R"};
- uchar code table2[10]={"C= pF"};
- uchar code table3[10]={"L= mH"};
- uchar code f_table[88]={13,14,15,16,17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100};
- uchar code f_correct[88]={9,10, 11, 12, 12, 12, 13, 14, 15, 16, 17, 18, 18, 18, 19, 20, 21, 21, 22, 23, 24, 25, 25, 26, 26, 27, 28, 29, 29, 30, 30, 31, 32, 33, 33, 34, 35, 35, 36, 37, 38, 38, 39, 40, 41, 41, 42, 42, 43, 44, 45, 45, 46, 47, 48, 49, 49, 50, 51, 51, 52, 53, 54, 54, 55, 55, 56, 57, 57, 58, 59, 60, 60, 62, 62, 63, 64, 64, 65, 66, 66, 67, 67, 68, 69, 70, 71, 71,};
- uchar a6,a5,a4,a3,a2,a1;
- uchar flag;
- unsigned long cnt,cnt1;
- uchar f_cnt;
- /********************************/
- void delay_us(); //18us
- void delay_ms(uint);
- void lcd_init();
- void lcd_write_com(uchar com);
- void lcd_write_dat(uchar dat);
- void lcd_init();
- void lcd_display(uchar add,uchar dat);
- /***********************************/
- void delay_us()
- {
- uchar x;
- for(x=0;x<5;x++);
- }
- void delay_ms(uint z)
- {
- uint x,y;
- for(x=0;x<z;x++)
- for(y=0;y<123;y++);
- }
- void lcd_write_com(uchar com)
- {
- E=0;
- RS=0;
- RW=0;
- delay_us();
- LCD_data=com;
- E=1; //高脈沖寫入數據
- delay_us();
- E=0;
- }
- void lcd_write_dat(uchar dat)
- {
- E=0;
- RS=1;
- RW=0;
- delay_us();
- LCD_data=dat;
- E=1; //高脈沖寫入數據
- delay_us();
- E=0;
- }
- void lcd_init() //lcd初始化
- {
- delay_ms(15);
- lcd_write_com(0x38);
- delay_ms(10);
- lcd_write_com(0x0c);
- lcd_write_com(0x06);
- lcd_write_com(0x01);
- delay_ms(2);
-
-
- }
- void timer_init(void) //定時器初始化
- {
- TMOD=0X51;
- PT0=1; /*中斷優先*/
- TH0=0x3c;
- TL0=0xb0;
- TH1=0;
- TL1=0;
- ET0=1;
- ET1=1;
- TR0=1;
- TR1=1;
- EA=1;
- }
- void lcd_display(uchar add,uchar dat) //lcd顯示（地址，數據）
- {
- lcd_write_com(add);
-
- lcd_write_dat(dat);
- delay_us();
- }
- void real_display(void)
- {
- if(!R)
- {
- // while(!R);
- A1=A0=0;
- lcd_display(0x80,table1[0]);
- lcd_display(0x80+1,table1[1]);
- lcd_display(0x80+8,table1[8]);
- lcd_display(0x80+9,table1[9]);
- }
- else if(!C)
- {
- A0=0;A1=1;
- lcd_display(0x80,table2[0]);
- lcd_display(0x80+1,table2[1]);
- lcd_display(0x80+8,table2[8]);
- lcd_display(0x80+9,table2[9]);
- }
- else if(!L)
- {
- A0=1;A1=0;
- lcd_display(0x80,table3[0]);
- lcd_display(0x80+1,table3[1]);
- lcd_display(0x80+8,table3[8]);
- lcd_display(0x80+9,table3[9]);
- }
- if(a6)
- lcd_display(0x80+2,0x30+a6);
- else
- lcd_display(0x80+2,' ');
- if(a6||a5)
- lcd_display(0x80+3,0x30+a5);
- else
- lcd_display(0x80+3,' ');
- if(a6||a5||a4)
- lcd_display(0x80+4,0x30+a4);
- else
- lcd_display(0x80+4,' ');
- if(a6||a5||a4||a3)
- lcd_display(0x80+5,0x30+a3);
- else
- lcd_display(0x80+5,' ');
- if(a6||a5||a4||a3||a2)
- lcd_display(0x80+6,0x30+a2);
- else
- lcd_display(0x80+6,' ');
-
- lcd_display(0x80+7,0x30+a1);
-
- }
- void correct(void) //誤差修正函數
- {
- uchar i,k;
- unsigned long wucha;
- if(cnt<100000) //100KHz以內的修正
- {
- if(cnt>980&&cnt<2100) cnt-=1;
- if(cnt>=2100&&cnt<3900) cnt-=2;
- if(cnt>=3900&&cnt<4800) cnt-=3;
- if(cnt>=4800&&cnt<5700) cnt-=4;
- if(cnt>=5700&&cnt<8000) cnt-=5;
- if(cnt>=8000&&cnt<9100) cnt-=6;
- if(cnt>=9100&&cnt<10900) cnt-=7;
- if(cnt>=10900&&cnt<11900) cnt-=8;
- if(cnt>=11900&&cnt<13000) cnt-=9;
- if(cnt>=13000&&cnt<=100000)
- {
- k=cnt/1000;
- for(i=0;i<88;i++)
- {
- if(k==f_table[i])
- {
- cnt-=f_correct[i];
- }
- }
- }
-
-
- }
- if(cnt>100000)
- {
- wucha=(cnt/1000)*73065/100000;
- cnt-=wucha;
- }
- }
- void main()
- {
- timer_init();
- lcd_init();
- while(1)
- {
- if(flag==1)
- {
- real_display();
- flag=0;
- }
-
-
- }
-
- }
- void timer0() interrupt 1
- {
- uchar timer0;
-
- TH0=0x3c; //50ms
- TL0=0xb0;
- timer0++;
- if(timer0==20)
- {
- TR1=0; //關閉的計數器
- EA=0;
- cnt=TL1+TH1*256+f_cnt*65536;
- correct();
- //cnt1=(1e+9)/(2*0.693 *cnt)-20000/2;
- if(!R)
- {
- // while(!R);
- cnt1=1000000/(0.2*0.693*cnt)-165;
- }
- else if(!C)
- {
- cnt1=1000000000/(0.693*3*510*cnt);
- }
- else if(!L)
- {
- cnt1=(1e+9)/(4*3.14*3.14*cnt*cnt*0.05);
- }
- timer0=0;
-
- a6=cnt1%10000000/100000;
- a5=cnt1%100000/10000;
- a4=cnt1%10000/1000;
- a3=cnt1%1000/100;
- a2=cnt1%100/10;
- a1=cnt1%10;
- flag=1;
- TH1=0;
- TL1=0;
- TH0=0x3c;
- TL0=0xb0;
- cnt=0;
- f_cnt=0;
- EA=1;
- TR1=1; //打開計數器
-
-
- }
-
- }
- void int1() interrupt 3
- {
- f_cnt++;
- }
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