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51單片機做的頻率計，可以測到16M.另外還有AD0832模數轉換芯片采集峰值，使用lcd1602液晶屏顯示
0.png (205.54 KB, 下載次數: 83)
下載附件
2016-9-2 02:47 上傳
單片機頻率計的源程序如下：
- //*******************************
- //**********設計者：陳仲奇********
- //**********歡迎交流指導**************
- //********************************
- #include <REGX52.H>
- #include<stdio.h>
- #include<math.h>
- #include"adc0832.h"
- #include "LCD1602.h"
- #define uchar unsigned char
- #define uint unsigned int
- sbit clr=P3^0;
- sbit gate=P3^1;
- sbit turn=P3^7;
- sbit U_turn=P3^2;
- uint num=0;
- uint peak_value=0;
- float Upp=0;
- uchar wave=1,pulse=1;
- uint j=0,counter=0;
- unsigned long int Hight_byte=0,Low_byte=0;
- //ms延時------------------------------
- void delay_ms(uint z)
- {
- uint x;
- uchar y;
- for(x=0;x<z;x++)
- for(y=0;y<110;y++) ;
- }
- //1s延時------------------------------
- void delay_1s(void)
- {
- uchar h,i,j,k;
- for(h=5;h>0;h--)
- for(i=4;i>0;i--)
- for(j=116;j>0;j--)
- for(k=214;k>0;k--);
- }
- //定時計數 初始化----------------------------------
- void CT_init()
- {
- TMOD = 0x25; // T0計數，T1定時
- TH0 = 0x00;
- TL0 = 0x00;
- TH1 = 0x06;
- TL1 = 0x06;
- clr=1;
- clr=0;
- gate=0;
- gate=1;
- ET0 = 1;
- ET1 = 1;
- EA = 1;
- TR0 = 1;
- TR1 = 1;
- }
- //主函數--------------------------------------
- void main()
- {
-
- unsigned long fre=0;
- bit mode=0;
- uchar buff[10];
- uint temp=0;
- LCD_Initial();
- CT_init();
- GotoXY(0,0);
- Print("Welcome to use ") ;
- GotoXY(0,1);
- Print("Please Wating...");
- delay_1s();
- LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);
- while(1){
- if(turn==0){
- delay_ms(5);
- if(turn==0) {
- while(turn==0);
- mode=~mode;LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);
- }
- }
- temp=vollage(0);
- if(temp>peak_value)
- peak_value=temp;
- if(temp>peak_value>>3&&temp<peak_value>>1) pulse=0;
-
- if(mode==0){
- fre=(Hight_byte*256)+Low_byte;
- if(fre==0){ GotoXY(0,0);Print("F= 0000000000 Hz"); GotoXY(0,1);Print("F= 0000000000 Hz"); }
- else{
- GotoXY(0,0);Print("F= Hz");sprintf(buff,"%ld",fre);GotoXY(2,0);Print(buff);
- GotoXY(0,1);Print("P= ms");sprintf(buff,"%0.6f",1000.0/fre);GotoXY(2,1);Print(buff); }
- }
-
- else{
- sprintf(buff,"%bd",wave);
- GotoXY(0,0);
- Print(buff);
- sprintf(buff,"Upp=%0.3fV",Upp);
- GotoXY(0,1);
- Print(buff);
-
- }
-
- }
-
- }
- /*--------------------------------------------------------------*/
- //計數器T0中斷服務程序
- void T0_counter(void) interrupt 1 using 1
- {
- }
- /*--------------------------------------------------------------*/
- //定時器T1中斷服務程序
- void T1_timer(void) interrupt 3 using 3
- {
-
- if(num==3999){
- gate=0;
- TR0=0;TR1=0;
- Hight_byte=TH0*256+TL0;
- Low_byte=P1;
- Upp=peak_value/100.0;
- peak_value=0;
- wave=pulse;
- pulse=1;
- clr=1;
- clr=0;
- TH0 = 0x00;
- TL0 = 0x00;
- TH1 = 0x06;
- TL1 = 0x06;
- num=0;
- gate=1;
- TR0=1;TR1=1;
- }
- else num++;
- }
0.png (79.31 KB, 下載次數: 85)
下載附件
2016-9-2 02:50 上傳
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頻率計.rar
2016-9-2 02:49 上傳
點擊文件名下載附件
下載積分: 黑幣 -5
75.77 KB, 下載次數: 195, 下載積分: 黑幣 -5
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