#include <reg51.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define uint unsigned int
#define uchar unsigned char
sbit pinRS=P2^0;
sbit pinRW=P2^1;
sbit pinE=P2^2;
#define pindata P0
#define clearscreen() writeinstruc(0x01)
#define cursorreturn() writeinstruc(0x02)
#define inputmode(temp) writeinstruc(temp)
//temp取值如下：
//0x04:減量方式，不移位
//0x05:減量方式，移位
//0x06:增量方式，不移位
//0x07:增量方式，移位
#define dispcontrol(temp) writeinstruc(temp)
//temp取值如下：
//0x08:顯示關，光標關，閃爍關
//0x0c:顯示關，光標關，閃爍關
//0x0d：顯示開，光標關，閃爍開
//0x0e:顯示開，光標開，閃爍關
//0x0f:顯示開，光標開，閃爍開
#define dispshift(temp) writeinstruc(temp)
//temp取值如下：
//0x10:光標左移
//0x14:光標右移
//0x18:顯示整體左移
//0x1c:顯示整體右移
#define functionset(temp) writeinstruc(temp)
//temp取值如下：
//0x20:4位，1行，5*7
//0x24:4位，1行，5*10
//0x28:4位，2行，5*7
//0x2c:4位，2行，5*10
//0x30:8位，1行，5*7
//0x34:8位，1行，5*10
//0x38:8位，2行，5*7
//0x3c:8位，2行，5*10
#define setCGRAM_Add(address) writeinstruc(0x40|address)
#define setDDRAM_Add(address) writeinstruc(0x80|address)//短延時
//void shortdelay(uchar i);
//長延時
//void longdelay(uint i);
//P2口初始化
//void initP2(bit i);
//寄存器選擇信號
//void setRS(bit i);
//讀寫操作控制
//void setRW(bit i);
//使能信號
//void setE(bit i);
//讀BF以及AC的值
//uint read_BF_AC();
//判忙
//bit statuscheck();
//寫指令函數
//void writeinstruc(uint instruc);
//寫數據到RAM
//void writedata(uint data1);
//從RAM中讀數據函數
//uint readdata(void);
//顯示程序 X為行號，Y為列號，date為要顯示的數據
//void dispcharacter(int x,uint y,uint data1);
//LCD復位函數
//void LCDreset();
#define uchar unsigned char
uchar k=0,result1;
void shortdelay(uchar i)//短延時
{
for(;i>0;i--);
}
//長延時
void longdelay(uint i)
{
uint j;
for(;i>0;i--)
{for(j=100;j>0;j--);}
}
//延時程序
void delay(int i)
{int j;
for(;i>0;i--)
for(j=0;j<100;j++);
}
//初試狀態
void io_init()
{P1=0xff;
}
//?---------------------------鍵盤掃描部分-----------------------------//
unsigned char key_scan()
{ unsigned char key;
unsigned char temp;
uint flag;
io_init();
P1=0xf0;
flag=0;
loop: temp=P1^0xf0;
while(temp)
{
P1=0xfe;
delay(1);
if((P1&0xfe)!=0xfe)
switch(P1)
{
case 0xee: key=0x11;flag=1;break;//讀7鍵和值
case 0xde: key=0x12;flag=1;break;
case 0xbe: key=0x13;flag=1;break;
case 0x7e: key=0x14;flag=1;break;//讀除鍵的值
}
if(flag)
goto exit;
else
P1=0xfd;
delay(1);
if((P1&0xfd)!=0xfd)
switch(P1)
{
case 0xed: key=0x21;flag=1;break;
case 0xdd: key=0x22;flag=1;break;
case 0xbd: key=0x23;flag=1;break;
case 0x7d: key=0x24;flag=1;break; //讀4到乘的鍵值
}
if(flag)
goto exit;
else
P1=0xfb;
delay(1);
if((P1&0xfb)!=0xfb)
switch(P1)
{
case 0xeb: key=0x31;flag=1;break;
case 0xdb: key=0x32;flag=1;break;
case 0xbb: key=0x33;flag=1;break;
case 0x7b: key=0x34;flag=1;break;//讀1到減的鍵值
}
if(flag)
goto exit;
else
P1=0xf7;
delay(1);
if((P1&0xf7)!=0xf7)
switch(P1)
{
case 0xe7: key=0x41;flag=1;break;//后退
case 0xd7: key=0x42;flag=1;break;//0
case 0xb7: key=0x43;flag=1;break;//等于
case 0x77: key=0x44;flag=1;break;//加
}
exit: return key;
}
if(temp==0)
goto loop;
}
//---------------------------------鍵盤掃描完--------------------------------------------//
//---------------------------------顯示初始化?----------------------------------------//
//P0口初始化
void initpindata(bit i)
{
if(i==1) pindata=0xff;
else pindata=0X00;
}
//寄存器選擇信號
void setRS(bit i)
{
if(i==1) pinRS=1;
else pinRS=0;
}
//讀寫操作控制
void setRW(bit i)
{
if(i==1) pinRW=1;
else pinRW=0;
}
//使能信號
void setE(bit i)
{
if(i==1) pinE=1;
else pinE=0;
}
//讀BF以及AC的值
uint read_BF_AC()
{
uint temp;
initpindata(1);
setRS(0);
setRW(1);
setE(1);
shortdelay(1);
temp=pindata;
shortdelay(10);
setE(0);
return(temp);
}
//判忙
bit statuscheck()
{
return((bit)(read_BF_AC()&0x80));
}
//寫指令函數
void writeinstruc(uint instruc)
{
while(statuscheck());
initpindata(0);
setRS(0);
setRW(0);
setE(0);
pindata=instruc;
//short delay(1);
setE(1);
shortdelay(10);
setE(0);
}
//寫數據到RAM
void writedata(uint data1)
{
initpindata(0);
setRS(1);
setRW(0);
setE(0);
pindata=data1;
setE(1);
shortdelay(10);
setE(0);
}
//從RAM中讀數據函數
uint readdata(void)
{
uint temp;
initpindata(1);
setRS(1);
setRW(1);
setE(1);
shortdelay(1);
temp=pindata;
shortdelay(10);
setE(0);
return(temp);
}
//顯示程序 X為行號，Y為列號，date為要顯示的數據
void dispcharacter(int x,uint y,uint data1)
{
uint temp;
while(statuscheck());
temp=y&0x0f;
x&=0x01;
if(x) temp|=0x40;
setDDRAM_Add(temp);
writedata(data1);
// writedata(data1);
}
//LCD復位函數
void LCDreset()
{
clearscreen();
cursorreturn();
}
//LCD初始化
void initLCD()
{
LCDreset();
inputmode(0x06);//增量方式，不移位
dispcontrol(0x0c);//顯示開，光標關，閃爍關
functionset(0x38);//8位，2行，5*7
}
//-----------------------------------準備工作完成-----------------------------------//
//-----------------------------------計算器-----------------------------------------//
compute(char key1,i)
{
signed char m,n,c,act;
long int num1,num2,result;
signed char str[4][4]={{'7','8','9','/'},
{'4','5','6','*'},
{'1','2','3','-'},
{'c','0','=','+'}};
signed char str1[11],string1[2];
m=(key1&0xf0);
m=m/16;
m=m-1;
n=key1&0x0f;
n=n-1;
c=str[m][n];
sprintf(string1,"%c",c);
strcat(str1,string1);
if((c=='+')||(c=='-')||(c=='*')||(c=='/'))
{
act=c;
num1=atoi(str1);
memset(str1,0,11);
memset(string1,0,2);
}
if(c=='=')
{
num2=atoi(str1);
switch(act)
{
case'+':
{ if(k==0)
{result=num1+num2;k++;break;}
else
{result+=num2;k++;break;}
}
case'-':
{if(k==0)
{result=num1-num2;k++;break;}
else
{result-=num2;k++;break;}
}
case'*':
{if(k==0)
{result=num1*num2;k++;break;}
else
{result*=num2;k++;break;}
}
case'/':
{if(k==0)
{result=num1/num2;k++;break;}
else
{ result/=num2;k++;break;}
}
}
}
if(c=='c')
{
act=0;
num1=str1[0];
num1=str1[8];
memset(str1,0,11);
memset(string1,0,2);
num1=str1[0];
num1=str1[8];
k=0;
}
longdelay(350);
switch(key1) //顯示部分
{case 0x11: dispcharacter(0,i,'7');i++;break;
case 0x12: dispcharacter(0,i,'8');i++; break;
case 0x13: dispcharacter(0,i,'9');i++; break;
case 0x14: dispcharacter(0,i,'/');i++;break;
case 0x21: dispcharacter(0,i,'4');i++;break;
case 0x22: dispcharacter(0,i,'5');i++;break;
case 0x23: dispcharacter(0,i,'6');i++;break;
case 0x24: dispcharacter(0,i,'*');i++;break;
case 0x31: dispcharacter(0,i,'1');i++;break;
case 0x32: dispcharacter(0,i,'2');i++;break;
case 0x33: dispcharacter(0,i,'3');i++;break;
case 0x34: dispcharacter(0,i,'-');i++;break;
case 0x41: clearscreen(); break;
case 0x42: dispcharacter(0,i,'0');i++;break;
case 0x43: dispcharacter(0,i,'=');i++;
m=result/10000;
result1=result%10000;
if(m!=0||result==0)
{
n=0;
m=m+'0';
dispcharacter(0,i,m);i++;
}
m=result1/1000;
result1=result1%1000;
if(m!=0||n==0)
{
m=m+'0';
n=0;
dispcharacter(0,i,m);i++;
}
m=result1/100;
result1=result1%100;
if(m!=0||n==0)
{
m=m+'0';
n=0;
dispcharacter(0,i,m);i++;
}
m=result1/10;
result1=result1%10;
if(m!=0||n==0)
{
m=m+'0';
n=0;
dispcharacter(0,i,m);i++;
}
m=result1;
if(m!=0||n==0)
m=m+'0';
dispcharacter(0,i,m);i++;break;
case 0x44: dispcharacter(0,i,'+');i++;break;
}
return(i);
}
//---------------------------------------------------------------------------------//
//-------------------------------------主函數---------------------------------------//
void main()
{
char key1,i;
start:initpindata(0);
P2=0X00;
initLCD();
i=0;
scan:key1=key_scan();
i=compute(key1,i);
if(key1==0x41)
goto start;
else
goto scan;
}
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