📄 lcd1602计算器2.c
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#include <reg52.h>
#include <math.h>
#include <string.h>
#include <intrins.h>
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp,Flag,key,keynum,fuctionkey,keydown;
uint num,num1,num2,calcuresult;
uint a[10];
void Init();
void delay_50us(uint t);
unsigned char LCD_Wait(void);
void LCD_Write(bit Comm_Dat, unsigned char input);//向LCD写入命令或数据
void LCD_SetDisplay(unsigned char DisplayMode);
void LCD_SetInput(unsigned char InputMode);
void LCD_Initial();
void GotoXY(unsigned char x, unsigned char y);
void Print(unsigned char *str);
Value();
void Keyscan();
void calculate();
/******LCD1602驱动程序****************************************************************/
//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_();
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 Comm_Dat, unsigned char input)
{
LcdEn=0;
LcdRs=Comm_Dat;
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);
}
//初始化LCD************************************************************
void LCD_Initial()
{
LcdEn=0;
delay_50us(5000);
LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏
LCD_Write(LCD_COMMAND,0x38);
delay_50us(5000); //8位数据端口,2行显示,5*7点阵
LCD_Write(LCD_COMMAND,0x38);
LCD_SetDisplay(0x0c); //开启显示, 无光标
LCD_SetInput(0x06); //AC递增, 画面不动
LCD_Write(LCD_COMMAND,0x80);
Print("LCD Calculate");
delay_50us(5000);
LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏
LCD_Write(LCD_COMMAND,0x80); //
}
//液晶字符输入的位置************************
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));
}
//将字符输出到液晶显示
void Print(unsigned char *str)
{
while(*str!=0)
LCD_Write(LCD_DATA,*str++);
delay_50us(6000);
}
/*************************************************************************************/
void delay_50us(uint t)
{
uchar j;
for(;t>0;t--)
for(j=19;j>0;j--);
}
/********计算处理******************************************************************/
//Calculate
void key1()
{
Print("1");
a[keynum-1]=1;
}
void key2()
{
Print("2");
a[keynum-1]=2;
}
void key3()
{
Print("3");
a[keynum-1]=3;
}
void key4()
{
Print("4");
a[keynum-1]=4;
}
void key5()
{
Print("5");
a[keynum-1]=5;
}
void key6()
{
Print("6");
a[keynum-1]=6;
}
void key7()
{
Print("7");
a[keynum-1]=7;
}
void key8()
{
Print("8");
a[keynum-1]=8;
}
void key9()
{
Print("9");
a[keynum-1]=9;
}
void key0()
{
Print("0");
a[keynum-1]=0;
}
/******************************************************************************************/
Value()
{
switch(keynum)
{
case 1:num=a[0];break;
case 2:num=a[0]*10+a[1];break;
case 3:num=a[0]*100+a[1]*10+a[2];break;
case 4:num=a[0]*1000+a[1]*100+a[2]*10+a[3];break;
case 5:num=a[0]*10000+a[1]*1000+a[2]*100+a[3]*10+a[4];break;
case 6:num=a[0]*100000+a[1]*10000+a[2]*1000+a[3]*100+a[4]*10+a[5];break;
// default:return(0);break;
}
}
/*****************************************************************************************************/
void GetValue1() //获取第一个数值
{
if(num1!=0)
num1=0;
Value();
num1=num;
num=0;
}
void GetValue2() //获取第二个数值
{
if(num2!=0)
num2=0;
Value();
num2=num;
num=0;
}
/******************************************************************************************************/
void keyadd() //加法键'+'
{
Print("+");
fuctionkey=1;
GetValue1() ;
keynum=0;
}
void keysub() //减法键'-'
{
Print("-");
fuctionkey=2;
GetValue1();
keynum=0;
}
void keyrst() //清除键'rst'
{
fuctionkey=0;
keynum=0;
Flag=0;
num=0;
num1=0;
num2=0;
calcuresult=0;
LCD_Write(LCD_COMMAND,0x01); //清屏
LCD_Write(LCD_COMMAND,0x80); //
}
void keyequa() //等于键'='
{
Print("=");
calculate();
keynum=0;
}
void keymul() //乘法键'*'
{
Print("*");
fuctionkey=3;
GetValue1();
keynum=0;
}
void keydiv() //除法键'/'
{
Print("/");
fuctionkey=4;
GetValue1();
keynum=0;
}
/**********键盘扫描******************************************************/
void Keyscan()
{
int tmp4; //暂存
tmp4=0xff;
P3=0xf0;
tmp4=P3;
if(tmp4==0xF0)
keydown=0;
if(tmp4!=0xF0)
delay_50us(50);;
if(tmp4!=0xF0)
keydown=1;//有键
else
keydown=0;//无键
if(keydown==1)
{
if(keynum==16)
{ LCD_Write(0, 0x80);
keynum=0;}
temp=0xfe;
P3=temp;
if((P3&0xf0)!=0xf0)
{
delay_50us(100);
if((P3&0xf0)!=0xf0)
{
switch(P3)
{
case 0xee:keyrst();break;
case 0xde:keynum++;key9();break;
case 0xbe:keynum++;key5();break;
case 0x7e:keynum++;key1();break;
}
}
}
temp=0xfd;
P3=temp;
if((P3&0xf0)!=0xf0)
{
delay_50us(100);
if((P3&0xf0)!=0xf0)
{
switch(P3)
{
case 0xed:keyequa();break;
case 0xdd:keynum++;key0();break;
case 0xbd:keynum++;key6();break;
case 0x7d:keynum++;key2();break;
}
}
}
temp=0xfb;
P3=temp;
if((P3&0xf0)!=0xf0)
{
delay_50us(100);
if((P3&0xf0)!=0xf0)
{ Flag=1;
switch(P3)
{
case 0xeb:keymul();break;
case 0xdb:keyadd();break;
case 0xbb:keynum++;key7();break;
case 0x7b:keynum++;key3();break;
}
}
}
temp=0xf7;
P3=temp;
if((P3&0xf0)!=0xf0)
{
delay_50us(100);
if((P3&0xf0)!=0xf0)
{ Flag=1;
switch(P3)
{
case 0xe7:keydiv();break;
case 0xd7:keysub();break;
case 0xb7:keynum++;key8();break;
case 0x77:keynum++;key4();break;
}
}
}
}
keydown=0;
}
/****************************************************************************************/
void calculate()
{
uchar b[10];
GetValue2();
calcuresult=0;//再次保证 calcuresut=0;
switch(fuctionkey)
{
case 1: calcuresult=num1+num2;break;
case 2: calcuresult=num1-num2;break;
case 3: calcuresult=num1*num2;break;
case 4: {if(num2==0)
{
GotoXY(0, 0);
Print("Input is error!");
GotoXY(0, 1);
Print("Please restart!");
}
else
calcuresult=num1/num2;}break;
}
/**********************************************
char String[8]; //sprintf使用例子
int dataddd;
sprintf(String,"%d",dataddd);
如果dataddd＝10 String="31,30,00,00,00,00,00,00";
sprintf(String,"%2.1f",dataddd);
如果dataddd＝10.5 String="31,30,2e,35,00,00,00,00";
/**********************************************/
GotoXY(0, 1);
sprintf(b,"%d",calcuresult);
Print(b);
num1=num2=num=0;
keynum=0;
}
void Init()
{
P0=0xff;
P3=0xff;
P2=0xff;
Flag=0;
fuctionkey=0;
calcuresult=0;
num1=0;
num2=0;
num=0;
keynum=0;
}
void main()
{
Init();
LCD_Initial();
while(1)
{
Keyscan();
}
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