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程序和仿真程序,原理圖都在壓縮包里,經(jīng)過本人親自驗(yàn)證可以使用
電路原理圖如下:
51hei.png (47.64 KB, 下載次數(shù): 49)
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2022-4-23 01:03 上傳
仿真原理圖如下(proteus仿真工程文件可到本帖附件中下載)
51hei.gif (67.54 KB, 下載次數(shù): 44)
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2022-4-23 01:03 上傳
仿真截圖.png (86.84 KB, 下載次數(shù): 49)
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仿真圖
2022-4-22 23:03 上傳
單片機(jī)源程序如下:
- //******************************************************************************************
- //連接框圖: ___________________
- // | P1.0 |->RS
- // | P1.1 |->RW
- // | P1.2 |->E
- // | P0 |->DB
- // | P3.4 |->1~9999hz的輸入
- // | P3.5 |->1~9999KHZ輸入 (分頻后)
- //******************************************************************************************
- #include <reg52.h>
- unsigned long int fre;
- unsigned char time;
- unsigned int count;
- unsigned int count1;
- //端口及函數(shù)說明----------------------------------------------------------------------------
- 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)
- #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 FLAG = 0;
- 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 timer_init(); //中斷初始化函數(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++);
- }
- 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 切記要寫三遍!�。�!
- 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_num(void)
- {
- unsigned char i=0,j=0,k=0;
- LCD_write_command(0x01);//清除屏幕顯示
-
- character[0] = fre/1000000;
- character[1] = fre/100000%10;
- character[2] = fre/10000%10;
- character[3] = fre/1000%10;
- character[4] = fre/100%10;
- character[5] = fre/10%10;
- character[6] = fre%10;
- character[7] = 'H';
- character[8] = '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 = 10-i-2;
- 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 main()
- {
- unsigned char i;
- LCD_init();
- timer_init(); //定時(shí)/計(jì)數(shù)器初始化
-
- for(i = 0;i<4;i++)
- {
- LCD_disp_char(i+0,1,character_1[i]);
- }
- while(1)
- {
- dis_num(); //顯示
- delay_1s();
-
- }
- }
- void timer_init(void) //定時(shí)/計(jì)數(shù)器初始化
- {
- TMOD=0x66; //計(jì)數(shù)器0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)器開始計(jì)數(shù)
- ET0=1; //打開計(jì)數(shù)器0中斷
- TH1=0; //計(jì)數(shù)器初值為0
- TL1=0;
- TR1=1; //計(jì)數(shù)器開始計(jì)數(shù)
- ET1=1; //打開計(jì)數(shù)器0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
- TL2=RCAP2L;
- ET2=1; //打開定時(shí)器2中斷
- TR2=1; //定時(shí)器2開始計(jì)時(shí)
- EA=1; //開總中斷
- }
- //----------------------------------------------------------------
- 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
- fre=(long)count*256+TL0; //count*256強(qiáng)制轉(zhuǎn)換成long型,否則將不產(chǎn)生進(jìn)位 先判斷分頻后的
-
- if(fre>2000)//200K之后讀取分頻后的頻率
- {
- fre = (long)count1*256+TL1;
- }
-
- count=0; //清零計(jì)數(shù)器0計(jì)數(shù)
- count1=0;
- EA=1; //開中斷
- }
- }
- //----------------------------------------------------------------
- void timer0(void) interrupt 1 //計(jì)數(shù)器0中斷
- {
- count++;
- }
- //----------------------------------------------------------------
- void timer1(void) interrupt 3 //計(jì)數(shù)器1中斷
- {
- count1++;
- }
-
復(fù)制代碼
注意Proteus只能用7.5版本,高版本都不行的 我測(cè)試過:
Proteus7.5版本的仿真和程序.7z
(466.71 KB, 下載次數(shù): 101)
2022-4-23 01:04 上傳
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