51单片机 1602LCD计数显示实验 -

标题: 51单片机 1602LCD计数显示实验 [打印本页]

作者: 凯尔特 时间: 2018-7-30 17:25
标题: 51单片机 1602LCD计数显示实验
//按4X4键盘的F键进入设定状态
//E D 键是前后移动键
//C按键是调整数值按键
#include "reg52.h"
#define uchar unsigned char
sbit RW=P2^1;
sbit RS=P2^0;
sbit E=P2^2;
bit at=0;
uchar code shen[]={"CLOCK!"};
uchar code word[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x20};
uchar dispbuf[8],h,m,s,counter;
void delay()
{
  uchar i;
for(i=0;i<255;i++);
}

/*******写命令**********/
void lcd_wmc(uchar i)
{

  P0=i;
  RS=0;
  RW=0;
  E=0;
  delay();
  E=1;
}

/*******写数据***********/

void lcd_wmd(uchar i)
{

  P0=i;
  RS=1;
  RW=0;
  E=0;
  delay();
  E=1;
}

/*******初始化液晶*******/
void lcd_init()
{
  uchar i;
  lcd_wmc(0x01);
  lcd_wmc(0x38);
  lcd_wmc(0x0c);
  lcd_wmc(0x06);
  lcd_wmc(0xc9);
  for(i=0;i<6;i++)
  lcd_wmd(shen[i]);
  lcd_wmc(0xc0);
}

/*******更新缓冲区子程序*******/
void newbuf()
{
dispbuf[0]=s%10;
dispbuf[1]=s/10;
dispbuf[3]=m%10;
dispbuf[4]=m/10;
dispbuf[6]=h%10;
dispbuf[7]=h/10;
}

/*******显示子程序**********/
void disp(uchar dispadd)
{
uchar tmp;
lcd_wmc(dispadd);
tmp=dispbuf[7];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[6];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[5];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[4];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[3];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[2];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[1];
tmp=word[tmp];
lcd_wmd(tmp);
tmp=dispbuf[0];
tmp=word[tmp];
lcd_wmd(tmp);
}

/*********************键盘子程序***********************/

uchar keypro(void)
{
  uchar scanl,scanh;
  P1=0x0f;//先将所有行线拉低
  if((P1&0x0f)!=0x0f) //如果列线有变化
  {
delay();//延迟一段时间。
if((P1&0x0f)!=0x0f)//如果此时此刻列线还有变化，说明确实有按键按下
{
   scanl=0xfe;
   while((scanl&0x10)!=0)
   {
      P1=scanl; //给P1口赋扫描码,每次只拉低一行
      if((P1&0xf0)!=0xf0) //如果判断为真,则说明找到了按键按下的行
      {
      scanh=(P1&0xf0)|0x0f; //计算识别码
      return (~scanh)+(~scanl);
      }
      else scanl=(scanl<<1)|0x01; //否则依次将第二，第三，第四行拉低

   }
}
  }
  return 0;//没有按键  按下返回0
}

/********************时间调整子程序********************/
void adjustime()
{
  uchar k;
  static uchar add;
  k=keypro();
  switch(k)
  {
case 0x88: if(!at){add=0xc1;EA=0;lcd_wmc(0xc1);lcd_wmc(0x0f);at=1;}
            else {lcd_wmc(0xc0);lcd_wmc(0x0c);at=0;EA=1;} break;

case 0x48:  if(at)
         {
   if(add==0xc1){add=0xc7; lcd_wmc(add);}
               else {add=add-3;lcd_wmc(add);}
            }
      break;

  case 0x28:  if(at)
         {
            if(add==0xc7) {add=0xc1;lcd_wmc(add);}
               else {add=add+3;lcd_wmc(add);}
         }
   break;

case 0x18: if(at)
         {
            if(add==0xc1) h++;
            if(h==24)
      h=0;
            if(add==0xc4) m++;
      if(m==60)
         m=0;
            if(add==0xc7) s++;
      if(s==60)
         s=0;
         newbuf();
   disp(0xc0);
   lcd_wmc(add);
            }
            break;
  default: break;
  }
  if(k!=0)
{
  while((P1&0xf0)!=0xf0)
  P1=0xf0;
}

}

/*********************初始化子程序**********************/
void init()
{

  TMOD=0x01;
  TH0=0x4c;
  TL0=0x00;
  EA=1;
  ET0=1;
  TR0=1;
  counter=0;
  h=12;m=0;s=0;
  dispbuf[2]=10;
  dispbuf[5]=10;
}

/***************************主程序************************/

void main(void)
{
  init();
  lcd_init();

  while(1)
  {
adjustime();
if(!at)
{
   //闪烁
   if(counter<10)
   {
   dispbuf[2]=10;
   dispbuf[5]=10;
   }
   else
   {
   dispbuf[2]=11;
   dispbuf[5]=11;
   }
   //更新显示缓冲区及调用显示程序
   if(counter==0)
   {
   newbuf();
   disp(0xc0);
   }
   else if(counter==10)
   disp(0xc0);
}
}
}

/*************************定时器0的中断**********************/
void Time0() interrupt 1 using 2 //再次强调中断子程序执行时间越短越好
{
  TH0=(65536-46075)/256;
  TL0=(65536-46075)%256;
  counter++;
  if(counter==20)
  {
s++;
  counter=0;
  if(s==60)
  {
m++;
s=0;
   if(m==60)
{
   h++;
m=0;
if(h==24)
   h=0;
      }
   }

  }
}

1602LCD计数显示实验.rar

17.65 KB, 下载次数: 24, 下载积分: 黑币 -5

作者: 凯尔特 时间: 2018-7-30 17:29
#include <REGX52.H>
#include "LCD1602.h"

unsigned char TempBuffer[10];
void IntToStr(unsigned int t, unsigned char *str, unsigned char n)
{
unsigned char a[5]; char i, j;
a[0]=(t/10000)%10;       //取得整数值到数组
a[1]=(t/1000)%10;
a[2]=(t/100)%10;
a[3]=(t/10)%10;
a[4]=(t/1)%10;

for(i=0; i<5; i++)       //转成ASCII码
a[i]=a[i]+'0';
for(i=0; a[i]=='0' && i<=3; i++);
for(j=5-n; j<i; j++)    //填充空格
{ *str=' ';  str++; }
for(; i<5; i++)
{ *str=a[i]; str++; }  //加入有效的数字
*str='\0';
}

void Delay1ms(unsigned int count)
{
unsigned int i,j;
for(i=0;i<count;i++)
for(j=0;j<120;j++);
}

main()
{
unsigned int Count = 0;
LCD_Initial();
GotoXY(0,0);
Print("The 1602LCD Test");
GotoXY(0,1);
Print("    BY RICHMCU");

while(1)
{
IntToStr(Count++,&TempBuffer[0],5);
GotoXY(0,1);
Print(&TempBuffer[0]);
Delay1ms(500);
}
}

作者: 凯尔特 时间: 2018-7-30 17:30

#ifndef LCD_CHAR_1602_2005_4_9
#define LCD_CHAR_1602_2005_4_9

#include <intrins.h>

//Port Definitions**********************************************************
sbit LcdRs = P2^0;
sbit LcdRw = P2^1;
sbit LcdEn    = P2^2;
sfr  DBPort = 0x80; //P0=0x80,P1=0x90,P2=0xA0,P3=0xB0.数据端口

//内部等待函数**************************************************************************
unsigned char LCD_Wait(void)
{
LcdRs=0;
LcdRw=1; _nop_();
LcdEn=1; _nop_();
while(DBPort&0x80);//在用Proteus仿真时，注意用屏蔽此语句，在调用GotoXY()时，会进入死循环，
   //可能在写该控制字时，该模块没有返回写入完备命令，即DBPort&0x80==0x80
   //实际硬件时打开此语句
LcdEn=0;
return DBPort;
}
//向LCD写入命令或数据************************************************************
#define LCD_COMMAND 0    // Command
#define LCD_DATA 1    // Data
#define LCD_CLEAR_SCREEN 0x01    // 清屏
#define LCD_HOMING    0x02    // 光标返回原点
void LCD_Write(bit style, unsigned char input)
{
LcdEn=0;
LcdRs=style;
LcdRw=0; _nop_();
DBPort=input; _nop_();//注意顺序
LcdEn=1; _nop_();//注意顺序
LcdEn=0; _nop_();
LCD_Wait();
}

//设置显示模式************************************************************
#define LCD_SHOW 0x04 //显示开
#define LCD_HIDE 0x00 //显示关

#define LCD_CURSOR 0x02 //显示光标
#define LCD_NO_CURSOR 0x00 //无光标

#define LCD_FLASH 0x01 //光标闪动
#define LCD_NO_FLASH 0x00 //光标不闪动

void LCD_SetDisplay(unsigned char DisplayMode)
{
LCD_Write(LCD_COMMAND, 0x08|DisplayMode);
}

//设置输入模式************************************************************
#define LCD_AC_UP 0x02
#define LCD_AC_DOWN 0x00    // default

#define LCD_MOVE 0x01    // 画面可平移
#define LCD_NO_MOVE 0x00    //default

void LCD_SetInput(unsigned char InputMode)
{
LCD_Write(LCD_COMMAND, 0x04|InputMode);
}

//移动光标或屏幕************************************************************
/*
#define LCD_CURSOR 0x02
#define LCD_SCREEN 0x08
#define LCD_LEFT 0x00
#define LCD_RIGHT 0x04
void LCD_Move(unsigned char object, unsigned char direction)
{
if(object==LCD_CURSOR)
LCD_Write(LCD_COMMAND,0x10|direction);
if(object==LCD_SCREEN)
LCD_Write(LCD_COMMAND,0x18|direction);
}
*/
//初始化LCD************************************************************
void LCD_Initial()
{
LcdEn=0;
LCD_Write(LCD_COMMAND,0x38);          //8位数据端口,2行显示,5*7点阵
LCD_Write(LCD_COMMAND,0x38);
LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR); //开启显示, 无光标
LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏
LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE);    //AC递增, 画面不动
}

//************************************************************************
void GotoXY(unsigned char x, unsigned char y)
{
if(y==0)
LCD_Write(LCD_COMMAND,0x80|x);
if(y==1)
LCD_Write(LCD_COMMAND,0x80|(x-0x40));
}
void Print(unsigned char *str)
{
while(*str!='\0')
{
LCD_Write(LCD_DATA,*str);
str++;
}
}

void LCD_Print(unsigned char x, unsigned char y, unsigned char *str)
{
  GotoXY(x,y);
  Print(str);
}

/*
void LCD_LoadChar(unsigned char user[8], unsigned char place)
{
unsigned char i;
LCD_Write(LCD_COMMAND,0x40|(place*8));
for(i=0; i<8; i++)
LCD_Write(LCD_DATA,user[i]);
}
*/
//************************************************************************
#endif

作者: xuchuntao 时间: 2020-3-1 13:37
很不错。非常好用

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