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基于51單片機(jī)的低頻數(shù)字式相位測(cè)量?jī)x
2019全國(guó)電子設(shè)計(jì)大賽第一階段C題
仿真and程序文件
仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
0.png (162.53 KB, 下載次數(shù): 73)
下載附件
2019-5-30 18:36 上傳
0.png (7.24 KB, 下載次數(shù): 64)
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2019-5-30 18:35 上傳
題目.PNG (56.71 KB, 下載次數(shù): 70)
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2019-5-27 11:47 上傳
單片機(jī)源程序如下:
- #include <reg52.h>
- unsigned long int fre;
- unsigned long int per;
- unsigned char time;
- unsigned int count;
- unsigned long int count1;
- sbit LCD_RS=P1^0; //片選信號(hào)
- sbit LCD_RW=P1^1; //讀寫信號(hào)
- sbit LCD_E=P1^2; //使能信號(hào)
- sbit P20=P2^0;
- #define LCD_DB P0 //數(shù)據(jù)信號(hào)
- unsigned char character[10]={0};//在屏幕上顯示的字符串
- unsigned char character_1[]={"Fre= Hz"};
- unsigned char percentage[10]={0};//在屏幕上顯示的字符串
- unsigned char percentage_1[]={"Per= Deg"};
- void LCD_init(void);//初始化函數(shù)
- void LCD_write_command(unsigned char command);//寫指令函數(shù)
- void LCD_write_data(unsigned char dat);//寫數(shù)據(jù)函數(shù)
- void LCD_disp_char(unsigned char x,unsigned char y,unsigned char dat);//在某個(gè)屏幕位置上顯示一個(gè)字符,X（0-15),y(1-2)
- void delay_n40us(unsigned int n);//延時(shí)函數(shù)
- void timer1_init(); //中斷初始化函數(shù)
- //-----------------------------延時(shí)函數(shù)---------------------------
- void delay_n40us(unsigned int n) //延時(shí)函數(shù)
- {
- unsigned int i;
- unsigned char j;
- for(i=n;i>0;i--)
- for(j=0;j<2;j++);
- }
- void delay_1s()
- {
- unsigned int i,j;
- for(i = 0;i<100;i++)
- for(j = 0;j<1000;j++);
- }
- //---------------------lcd1602液晶顯示函數(shù)--------------------
- void LCD_init(void) //液晶初始化函數(shù)
- {
- LCD_write_command(0x38);//設(shè)置8位格式，2行，5x7
- LCD_write_command(0x38);//設(shè)置8位格式，2行，5x7
- LCD_write_command(0x38);//設(shè)置8位格式，2行，5x7
- LCD_write_command(0x0c);//整體顯示，關(guān)光標(biāo)，不閃爍
- LCD_write_command(0x06);//設(shè)定輸入方式，增量不移位
- LCD_write_command(0x01);//清除屏幕顯示
- delay_n40us(100);//清屏延時(shí)
- }
- void LCD_write_command(unsigned char dat) //寫命令函數(shù)
- {
- LCD_DB=dat;
- LCD_RS=0;//指令
- LCD_RW=0;//寫入
- LCD_E=1; //使能
- LCD_E=0;
- delay_n40us(1);//寫命令延時(shí)
- }
- void LCD_write_data(unsigned char dat) //寫數(shù)據(jù)函數(shù)
- {
- LCD_DB=dat;
- LCD_RS=1;//數(shù)據(jù)
- LCD_RW=0;//寫入
- LCD_E=1;//使能
- LCD_E=0;
- delay_n40us(1); //寫數(shù)據(jù)延時(shí)
- }
- void LCD_disp_char(unsigned char x,unsigned char y,unsigned char dat)//顯示一個(gè)字符
- {
- unsigned char address;
- if(y==1)
- address=0x80+x; //顯示在第一排的時(shí)候的x的地址
- else
- address=0xc0+x; //顯示在第二排的時(shí)候的x的地址
- LCD_write_command(address); //輸入地址
- LCD_write_data(dat); //輸入數(shù)據(jù)
- }
- void LCD_disp_num(unsigned char x,unsigned char y,unsigned char dat)//顯示一個(gè)數(shù)字
- {
- unsigned char address;
- if(y==1)
- address=0x80+x; //顯示在第一排的時(shí)候的x的地址
- else
- address=0xc0+x; //顯示在第二排的時(shí)候的x的地址
- LCD_write_command(address); //輸入地址
- LCD_write_data(dat+48); //輸入數(shù)據(jù)
- }
- void dis_num1(void)
- {
- unsigned char i=0,j=0,k=0;
- LCD_write_command(0x01);//清除屏幕顯示
- character[0] = fre/10000000;
- character[1] = fre/1000000%10;
- character[2] = fre/100000%10;
- character[3] = fre/10000%10;
- character[4] = fre/1000%10;
- character[5] = fre/100%10;
- character[6] = fre/10%10;
- character[7] = fre%10;
- character[8] = 'H';
- character[9] = 'z';
- for(i = 0;i<4;i++) //顯示“fre=”
- {
- LCD_disp_char(i+0,1,character_1[i]);
- }
- for(i = 0;i<10;i++) //判斷第一個(gè)不為0的數(shù)
- {
- if(character[i]!=0)
- break;
- }
- k = 8-i;
- for(j = 0;j<k;j++) //顯示所有的數(shù)字
- {
- LCD_disp_num(4+j,1,character[i++]);
- }
- for(i = 5;i<7;i++) //顯示“Hz”
- {
- LCD_disp_char(j+4,1,character_1[i]);
- j++;
- }
- }
- void dis_num2(void)
- {
- unsigned char i=0,j=0,k=0;
- LCD_write_command(0x10);//清除屏幕顯示
- percentage[0] = per/100;
- percentage[1] = per/10%10;
- percentage[2] = per%10;
- percentage[3] = 'd';
- percentage[4] = 'e';
- percentage[5] = 'g';
-
- for(i = 0;i<4;i++) //顯示per
- {
- LCD_disp_char(i+0,1,percentage_1[i]);
- }
- for(i = 0;i<10;i++) //判斷第一個(gè)不為0的數(shù)
- {
- if(percentage[i]!=0)
- break;
- }
- k = 3-i;
- for(j = 0;j<k;j++) //顯示所有的數(shù)字
- {
- LCD_disp_num(4+j,1,percentage[i++]);
- }
-
- for(i = 5;i<8;i++) //顯示%
- {
- LCD_disp_char(j+4,1,percentage_1[i]);
- j++;
- }
- }
- //----------------主函數(shù)--------------------
- void main()
- {
- int i;
- if(P20==1)
- i=1;
- else
- i=0;
- while(1)
- {
- if(P20==1&&i==1)
- timer1_init();
- while(P20==1)
- {
- LCD_init();
- dis_num1(); //顯示
- delay_1s();
- i=0;
- }
- if(P20==0&&i==0)
- timer1_init();
- while(P20==0)
- {
- LCD_init();
- dis_num2();
- delay_1s();
- i=1;
- }
- }
- }
- //-------------------定時(shí)/計(jì)數(shù)器初始化--------------
- void timer1_init(void) //定時(shí)/計(jì)數(shù)器初始化
- {
- TMOD=0xA6; //計(jì)數(shù)器0和定時(shí)器1工作工作方式2，自動(dòng)重裝初值
- TH0=0; //計(jì)數(shù)器初值為0
- TL0=0;
- TR0=1; //計(jì)數(shù)器開(kāi)始計(jì)數(shù)
- ET0=1; //打開(kāi)計(jì)數(shù)器0中斷
- TH1=0; //定時(shí)器高位，初值設(shè)為0
- TL1=0; //定時(shí)器低位，初值設(shè)為0
- TR1=1; //定時(shí)器開(kāi)始計(jì)數(shù)
- ET1=1; //打開(kāi)計(jì)數(shù)器1中斷
- RCAP2H=(65536-62500)/256; //在程序初始化的時(shí)候給RCAP2L和RCAP2H賦值，
- RCAP2L=(65536-62500)%256; //TH2和TL2將會(huì)在中斷產(chǎn)生時(shí)自動(dòng)使TH2=RCAP2H,TL2=RCAP2L。
- TH2=RCAP2H; //12M晶振下每次中斷62.5ms(1s=1000ms=62.5ms×16)
- TL2=RCAP2L;
- ET2=1; //打開(kāi)定時(shí)器2中斷
- TR2=1; //定時(shí)器2開(kāi)始計(jì)時(shí)
- EA=1; //開(kāi)總中斷
- }
- //------------------中斷函數(shù)----------------------
- void timer2(void) interrupt 5 //定時(shí)器2中斷(62.5ms)
- {
- time++;
- TF2=0; //定時(shí)器2的中斷標(biāo)志位TF2不能夠由硬件清零，所以要在中斷服務(wù)程序中將其清零
- if (time==16) //定時(shí)1s時(shí)間到
- {
- time=0; //計(jì)時(shí)清0
- EA=0; //關(guān)中斷
- fre=(long)count*256+TL0; //count*256強(qiáng)制轉(zhuǎn)換成long型
- per=(long)360-(360*(count1*256+TL1)/(16*62500)); //計(jì)算相位差
- TL0=0; //清零計(jì)數(shù)器0計(jì)數(shù)
- TL1=0;
- count=0; //清零計(jì)數(shù)器0計(jì)數(shù)
- count1=0;
- EA=1; //開(kāi)中斷
- }
- }
- //----------------------------------------------------------------
- void timer0(void) interrupt 1 //計(jì)數(shù)器0中斷
- {
- count++;
- }
- //----------------------------------------------------------------
- void timer1(void) interrupt 3 //定時(shí)器1中斷
- {
- count1++;
- }
所有資料51hei提供下載:
低頻數(shù)字式相位測(cè)量?jī)x.zip
(243.98 KB, 下載次數(shù): 160)
2019-5-27 11:48 上傳
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