#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define LCD_data P0 //数据口
sbit LCD_RS = P3^5; //寄存器选择输入
sbit LCD_RW = P2^0; //液晶读/写控制
sbit LCD_EN = P3^4; //液晶使能控制
sbit LCD_PSB = P2^1; //串/并方式控制
sbit wela = P2^7;
sbit dula = P2^6; //关闭LED灯
sbit wr=P3^6;
sbit rd=P3^7;
sbit fm=P2^3;
uint temp;
uchar p=3,q=1,jianzhi;
uint a1,a2,a3,date,q1;
uchar code dis1[] = {"毕业设计电子秤"};
uchar code dis2[] = {"单价:"};
uchar code dis3[] = {"重量:"};
uchar code dis4[] = {"总价:"};
uchar code table[]="0123456789";
uchar code table1[]="Kg";
uchar code table2[]={"元"};
uchar code dis5[] = {"2012毕业设计电子秤"};
uchar code dis6[] = {"姓名：钱志伟"};
uchar code dis7[] = {"学号：5901108126"};
uchar code dis8[] = {"欢迎老师批评指正"};
#define delayNOP(); {_nop_();_nop_();_nop_();_nop_();};//宏定义延时4个CPU
uchar IRDIS[2];
uchar IRCOM[4];
void delay0(uchar x); //x*0.14MS
void beep();
void dataconv();
void lcd_pos(uchar X,uchar Y); //确定显示位置
uint AD_read();
key_read ();
void disp_ad();
void disp_dy();
void disp_kj();
void disp_jianpan(uchar jian);
void disp_zongjia(uint qian);
void delay(int ms)
{
while(ms--)
{
uchar i;
for(i=0;i<250;i++)
{
_nop_();
_nop_();
_nop_();
_nop_();
}
}
}
bit lcd_busy()
{
bit result;
LCD_RS = 0;
LCD_RW = 1;
LCD_EN = 1;
delayNOP();
result = (bit)(P0&0x80);
LCD_EN = 0;
return(result);
}
/*******************************************************************/
/* */
/*写指令数据到LCD */
/*RS=L，RW=L，E=高脉冲，D0-D7=指令码。 */
/* */
/*******************************************************************/
void lcd_wcmd(uchar cmd)
{
while(lcd_busy());
LCD_RS = 0;
LCD_RW = 0;
LCD_EN = 0;
_nop_();
_nop_();
P0 = cmd;
delayNOP();
LCD_EN = 1;
delayNOP();
LCD_EN = 0;
}
/*******************************************************************/
/* */
/*写显示数据到LCD */
/*RS=H，RW=L，E=高脉冲，D0-D7=数据。 */
/* */
/*******************************************************************/
void lcd_wdat(uchar dat)
{
while(lcd_busy());
LCD_RS = 1;
LCD_RW = 0;
LCD_EN = 0;
P0 = dat;
delayNOP();
LCD_EN = 1;
delayNOP();
LCD_EN = 0;
}
void lcd_init()
{
LCD_PSB = 1; //并口方式
lcd_wcmd(0x34); //扩充指令操作
delay(5);
lcd_wcmd(0x30); //基本指令操作
delay(5);
lcd_wcmd(0x0F); //显示开，开光标
delay(5);
lcd_wcmd(0x01); //清除LCD的显示内容
delay(5);
}
main()
{
uchar w;
uchar jiage[3];
while(1)
{
delay(10); //延时
wela=0;
dula=0;
lcd_init(); //初始化LCD
disp_kj();//开机界面的显示
delay(500);
disp_dy();//显示价格重量等固定的文字
disp_ad();//AD转换值的显示
while(q)//判断标志位q是否为0，为0表示键盘按了确定键
{ uchar n=2;
w=key_read ();//调出键值
disp_jianpan(w);//将键值显示
jiage[n]=jianzhi;//将键值存入数组中
p++;
n--;
}
q=1;
p=3;
q1=jiage[2]*100+jiage[1]*10+jiage[0];//得到按键数
disp_zongjia(q1);//总价的计算和显示
}
}
void delay0(uchar x) //x*0.14MS
{
uchar i;
while(x--)
{
for (i = 0; i<13; i++) {}
}
}
void lcd_pos(uchar X,uchar Y)
{
uchar pos;
if (X==0)
{X=0x80;}
else if (X==1)
{X=0x90;}
else if (X==2)
{X=0x88;}
else if (X==3)
{X=0x98;}
pos = X+Y ;
lcd_wcmd(pos); //显示地址
}
/*AD转换函数*/
uint AD_read()
{
wela=1;
P0=0;
_nop_();
wr=0;
_nop_();
wr=1;
P0=0xff;
delay(10);
P0=0;
rd=0;
_nop_();
P1=0xff;
temp=P1;
return temp;
}
/*键盘扫描程序*/
key_read ()
{
unsigned char key,key1;
while(1)
{
P3=0xfe;//给P3.0一个低电平
key1=P3;
key1=key1&0xf0;
if(key1!=0xf0)
{
delay(10);//取抖
if(key1!=0xf0)
{
key1=P3;
switch(key1)
{
case 0xee://选中0号键
key=0;
break;
case 0xde://选中1号键
key=1;
break;
case 0xbe://选中2号键
key=2;
break;
case 0x7e://选中3号键
key=3;
break;
}
}
}
P3=0xfd;//给P3.1一个低电平
key1=P3;
key1=key1&0xf0;
if(key1!=0xf0)
{
delay(10);//取抖
if(key1!=0xf0)
{
key1=P3;
switch(key1)
{
case 0xed://选中4号键
key=4;
break;
case 0xdd://选中5号键
key=5;
break;
case 0xbd://选中6号键
key=6;
break;
case 0x7d://选中7号键
key=7;
break;
}
}
}
P3=0xfb;//给P3.2一个低电平
key1=P3;
key1=key1&0xf0;
if(key1!=0xf0)
{
delay(10);//取抖
if(key1!=0xf0)
{
key1=P3;
switch(key1)
{
case 0xeb://选中8号键
key=8;
break;
case 0xdb://选中9号键
key=9;
break;
case 0xbb://选中10号键
key=10;
break;
case 0x7b://选中11号键
key=11;
break;
}
}
}
P3=0xf7;//给P3.3一个低电平
key1=P3;
key1=key1&0xf0;
if(key1!=0xf0)
{
delay(10);//取抖
if(key1!=0xf0)
{
key1=P3;
switch(key1)
{
case 0xe7://选中12号键
key=12;
break;
case 0xd7://选中13号键
key=13;
break;
case 0xb7://选中14号键
key=14;
break;
case 0x77://选中15号键
key=15;
break;
}
}
}
return key;
}
}
/* AD转换数值显示函数*/
void disp_ad()
{
uint ad_read;
ad_read=AD_read();//将AD转换函数的返回值调出
date=(float)ad_read*50.0/256.0;
a1=date;
a2=a1/10;
a3=a1%10;
lcd_pos(2,3);
lcd_wdat(table[a2]);
lcd_pos(2,4);
lcd_wdat('.');
lcd_pos(2,5);
lcd_wdat(table[a3]);
lcd_pos(2,6);
lcd_wdat(table1[0]);
lcd_pos(2,7);
lcd_wdat(table1[1]);
}
void disp_dy()
{
uchar i;
lcd_pos(0,0); //设置显示位置为第一行的第1个字符
i = 0;
while(dis1 != '\0')
{ //显示字符
lcd_wdat(dis1);
i++;
}
lcd_pos(1,0); //设置显示位置为第二行的第1个字符
i = 0;
while(dis2 != '\0')
{
lcd_wdat(dis2); //显示字符
i++;
}
lcd_pos(2,0); //设置显示位置为第三行的第1个字符
i = 0;
while(dis3 != '\0')
{
lcd_wdat(dis3); //显示字符
i++;
}
lcd_pos(3,0); //设置显示位置为第四行的第1个字符
i = 0;
while(dis4 != '\0')
{
lcd_wdat(dis4); //显示字符
i++;
}
}
void disp_kj()
{
uchar i;
lcd_pos(0,0); //设置显示位置为第一行的第1个字符
i = 0;
while(dis5 != '\0')
{ //显示字符
lcd_wdat(dis1);
i++;
}
lcd_pos(1,0); //设置显示位置为第二行的第1个字符
i = 0;
while(dis6 != '\0')
{
lcd_wdat(dis2); //显示字符
i++;
}
lcd_pos(2,0); //设置显示位置为第三行的第1个字符
i = 0;
while(dis7 != '\0')
{
lcd_wdat(dis3); //显示字符
i++;
}
lcd_pos(3,0); //设置显示位置为第四行的第1个字符
i = 0;
while(dis8 != '\0')
{
lcd_wdat(dis4); //显示字符
i++;
}
}
void disp_jianpan(uchar jian)
{
uchar a;
a=jian;
if(a<10)
{lcd_pos(1,p);
lcd_wdat(table[a]);//将键值显示
jianzhi=table[a];}//if中要执行多个语句时要加大括号，
else if(a=10)
q=0;//确认键
else
fm=0;//警报响
}
void disp_zongjia(uint qian)
{
uchar z1,z2,z3,z4;
float q3,q2;
uint x, z0;
x=qian;
q3=a3*0.1+a2;
q2=x*q3;
z0=q2*10;
z1=(int)z0/1000;
z2=(int)z0%1000/100;
z3=(int)z0%1000%100/10;
z4=(int)z0%1000%100%10;
lcd_pos(3,3);
lcd_wdat(table[(int)z1]);
lcd_pos(3,4);
lcd_wdat(z2);
lcd_pos(3,5);
lcd_wdat(table[(int)z3]);
lcd_pos(3,6);
lcd_wdat('.');
lcd_pos(3,7);
lcd_wdat(table[(int)z4]);
}
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