基于51单片机的数字频率计设计（工程代码）

#include <STC12C5A.H> #include "lcd.h" #include "AD9851.h" #define key1 P20 #define key2 P21 #define key3 P22 unsigned char code dis[]={"Voltage="}; unsigned char code danwei1[]={"mV "}; unsigned char code dis1[]={"FQ="}; unsigned char code danwei2[]={"MHz "}; unsigned char code dua[10]={0+0x30,1+0x30,2+0x30,3+0x30,4+0x30,5+0x30,6+0x30,7+0x30,8+0x30,9+0x30}; long int r=1; double fq=1000000; unsigned int KeyValue,Voltage,rec=0; void init1() { SCON=0X50; //设置为工作方式1 TMOD=0X20; //设置计数器工作方式2 PCON=0X80; //波特率加倍 TH1=0Xf3; //计数器初始值设置，注意波特率是4800的 TL1=0Xf3; ES=1; //打开接收中断 EA=1; //打开总中断 TR1=1; //打开计数器 } void send(unsigned int da) { SBUF=da; while(!TI); TI=0; } void getkey() { uint t,i; if(key1==0) { delayms(60000); if(key1==0) { r=r+1; fq=r*1000000; } } if(key2==0) { delayms(60000); if(key2==0) { r=r-1; fq=r*1000000; } } if(key3==0) { delayms(60000); if(key3==0) { for(t=0;t<10;t++) { for(i=0;i<40;i++) { ad9851_wr_parrel(0x01,fq); delayms(10000); if(fq==41000000) { fq=1000000; } fq=fq+500000; } } } } if(r==50) r=1; } //***************************************************// // 测试程序1000Hz // //---------------------------------------------------// void main() { uchar i; P2M1=0X00; P2M0=0X00; LcdInit(); init1(); ad9851_reset(); ad9851_wr_parrel(0x01,1000000); LcdWriteCom(0x00+0x80); for(i=0;i<8;i++) { LcdWriteData(dis[i]); } LcdWriteCom(0x08+0x80); LcdWriteData(dua[rec%10000/1000]); LcdWriteCom(0x09+0x80); LcdWriteData(dua[rec%1000/100]); LcdWriteCom(0x0a+0x80); LcdWriteData(dua[rec%100/10]); LcdWriteCom(0x0b+0x80); LcdWriteData(dua[rec%10]); LcdWriteCom(0x0c+0x80); for(i=0;i<3;i++) { LcdWriteData(danwei1[i]); } LcdWriteCom(0x40+0x80); for(i=0;i<3;i++) { LcdWriteData(dis1[i]); } LcdWriteCom(0x43+0x80); LcdWriteData(dua[r%100/10]); LcdWriteCom(0x44+0x80); LcdWriteData(dua[r%10]); LcdWriteCom(0x45+0x80); for(i=0;i<3;i++) { LcdWriteData(danwei2[i]); } //---------------------------------------------------// //并行写1000Hz程序 //0X01为开六备频 //ad9851_wr_parrel(0x00,1000); //0X00为不开六备频 //---------------------------------------------------// while(1) { ad9851_wr_parrel(0x01,fq); getkey(); LcdWriteCom(0x00+0x80); for(i=0;i<8;i++) { LcdWriteData(dis[i]); } LcdWriteCom(0x08+0x80); LcdWriteData(dua[rec%10000/1000]); LcdWriteCom(0x09+0x80); LcdWriteData(dua[rec%1000/100]); LcdWriteCom(0x0a+0x80); LcdWriteData(dua[rec%100/10]); LcdWriteCom(0x0b+0x80); LcdWriteData(dua[rec%10]); LcdWriteCom(0x0c+0x80); for(i=0;i<3;i++) { LcdWriteData(danwei1[i]); } LcdWriteCom(0x40+0x80); for(i=0;i<3;i++) { LcdWriteData(dis1[i]); } LcdWriteCom(0x43+0x80); LcdWriteData(dua[r%100/10]); LcdWriteCom(0x44+0x80); LcdWriteData(dua[r%10]); LcdWriteCom(0x45+0x80); for(i=0;i<3;i++) { LcdWriteData(danwei2[i]); } send(r*2); } } void ti() interrupt 4 { EA=0; if(RI) { RI=0; rec=SBUF; } EA=1; }