基于51单片机的1602液晶频率计设计(Proteus仿真图和程序).doc

基于51单片机的1602液晶频率计设计一、Proteus仿真图：二、程序代码/最大测量65536Hz的频率计/原理：T0定时1S,T1计数#include #include#define uchar unsigned char#define uint unsigned int uint count=0;uint nm=0;uchar Fw,Fq,Fb,Fs,Fg;#define DataPort P0 sbit LCM_RS=P20; sbit LCM_RW=P21; sbit LCM_EN=P22; uchar code str0=-Test frequency-;uchar code str1=F=00000Hz ;/uchar code str2= ;/*/void delay(unsigned int k) unsigned int i,j; for(i=0;ik;i+) for(j=0;j121;j+) ; /=/* 函数名：void WaitForEnable(void) 作用：检测忙碌信号 */=/void WaitForEnable(void) DataPort=0xff; LCM_RS=0; LCM_RW=1; _nop_(); LCM_EN=1; _nop_(); _nop_(); /while(DataPort&0x80); delay(5); LCM_EN=0; /=/* 函数名：void WriteCommandLCM(uchar CMD,uchar Attribc) 作用： 写命令到LCM */=/void WriteCommandLCM(uchar CMD,uchar Attribc) if(Attribc)WaitForEnable(); LCM_RS=0; LCM_RW=0; _nop_(); DataPort=CMD; _nop_(); LCM_EN=1; _nop_(); _nop_(); LCM_EN=0; /=/* 函数名： void WriteDataLCM(uchar dataW) 作用：写数据 */=/void WriteDataLCM(uchar dataW) WaitForEnable(); LCM_RS=1; LCM_RW=0; _nop_(); DataPort=dataW; _nop_(); LCM_EN=1; _nop_(); _nop_(); LCM_EN=0; /=/* 函数名： void InitLcd() 作用：LCM初始化 */=/void InitLcd() WriteCommandLCM(0x38,1); WriteCommandLCM(0x08,1); WriteCommandLCM(0x01,1); WriteCommandLCM(0x06,1); WriteCommandLCM(0x0c,1); /=/*函数名：void DisplayOneChar(uchar X,uchar Y,uchar DData) 作用：显示指定坐标的一个字符 */=/void DisplayOneChar(uchar X,uchar Y,uchar DData) Y&=1; X&=15; if(Y)X|=0x40; X|=0x80; WriteCommandLCM(X,0); WriteDataLCM(DData); /=/*函数名：void DisplayListChar(uchar X,uchar Y,uchar code *DData 作用：显示指定坐标的一串字符 */=/void DisplayListChar(uchar X,uchar Y,uchar code *DData) uchar ListLength=0; Y&=0x1; X&=0xF; while(X=0;i-) DisplayListChar(i,0,str0);/显示第一行字符 DisplayListChar(i,1,str1);/显示第二行字符 delay(100); while(1) if(nm=10)/定时10*50MS=500mstemp=TL1; temp1=TH1; count=2*(temp1*