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![44~FEI6O2TAEG%LA2V]E$`Y.png](http://c.51hei.com/d/forum/202012/05/192417zzdcjpbecc522ccc.png "44~FEI6O2TAEG%LA2V]E$`Y.png")
单片机源程序如下:
#include <reg52.h>
#include <intrins.h>
#include <string.h>
bit bdata flag_key;
#include "main.h"
#include "LCD1602.h"
#include "HX711.h"
#include "keyboard.h"
#include "eeprom52.h"
#include "tlc549.h"
#define uchar unsigned char
#define uint unsigned int
unsigned long HX711_Buffer = 0;
unsigned long Weight_Maopi = 0;
unsigned long Weight_Maopi_0 = 0;
unsigned int qupi=0;
long Weight_Shiwu = 0;
//键盘处理变量
unsigned char keycode;
unsigned char DotPos; //小数点标志及位置
uint GapValue,GapValue1;
unsigned char idata price; //单价，长整型值，单位为分
unsigned char idata money; //总价，长整型值，单位为分
unsigned char idata lm35;
//定义标识
volatile bit FlagTest = 0; //定时测试标志，每0.5秒置位，测完清0
volatile bit FlagKeyPress = 0; //有键按下标志，处理完毕清0
//校准参数
//因为不同的传感器特性曲线不是很一致，因此，每一个传感器需要矫正这里这个参数才能使测量值很准确。
//当发现测试出来的重量偏大时，增加该数值。
//如果测试出来的重量偏小时，减小改数值。
//该值可以为小数
//#define GapValue 349
sbit LED=P3^2;
volatile bit ClearWeighFlag = 0; //传感器调零标志位，清除0漂
/******************把数据保存到单片机内部eeprom中******************/
void write_eeprom()
{
SectorErase(0x1000);
GapValue1=GapValue&0x00ff;
byte_write(0x2000, GapValue1);
GapValue1=(GapValue&0xff00)>>8;
byte_write(0x2001, GapValue1);
byte_write(0x2060, a_a);
}
/******************把数据从单片机内部eeprom中读出来*****************/
void read_eeprom()
{
GapValue = byte_read(0x2001);
GapValue = (GapValue<<8)|byte_read(0x2000);
a_a = byte_read(0x2060);
}
/**************开机自检eeprom初始化*****************/
void init_eeprom()
{
read_eeprom(); //先读
if(a_a != 1) //新的单片机初始单片机内问eeprom
{
GapValue = 3500;
a_a = 1;
write_eeprom(); //保存数据
}
}
//显示单价，单位为元，四位整数，两位小数
void Display_Price()
{
LCD1602_write_com(0x8c);
LCD1602_write_data(price/100 + 0x30);
LCD1602_write_data(price%100/10 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(price%10 + 0x30);
}
//显示重量，单位kg，两位整数，三位小数
void Display_Weight()
{
LCD1602_write_com(0x82);
LCD1602_write_data(Weight_Shiwu/10000 + 0x30);
LCD1602_write_data(Weight_Shiwu%10000/1000 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(Weight_Shiwu%1000/100 + 0x30);
LCD1602_write_data(Weight_Shiwu%100/10 + 0x30);
LCD1602_write_data(Weight_Shiwu%10 + 0x30);
LCD1602_write_word("K ");
}
//显示总价，单位为元，四位整数，两位小数
void Display_Money()
{
// unsigned int i,j;
if (money>9999) //超出显示量程
{
LCD1602_write_com(0xC2);
LCD1602_write_word("---.-");
return;
}
if (money>=1000)
{
LCD1602_write_com(0XC2);
LCD1602_write_data(money/1000 + 0x30);
LCD1602_write_data(money%1000/100 + 0x30);
LCD1602_write_data(money%100/10 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(money%10 + 0x30);
}
else if (money>=100)
{
LCD1602_write_com(0XC2);
LCD1602_write_data(0x20);
LCD1602_write_data(money%1000/100 + 0x30);
LCD1602_write_data(money%100/10 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(money%10 + 0x30);
}
else if(money>=10)
{
LCD1602_write_com(0XC2);
LCD1602_write_data(0x20);
LCD1602_write_com(0XC3);
LCD1602_write_data(0x20);
LCD1602_write_data(money%100/10 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(money%10+ 0x30);
}
else
{
LCD1602_write_com(0XC2);
LCD1602_write_data(0x20);
LCD1602_write_com(0xC3);
LCD1602_write_data(0x20);
LCD1602_write_com(0xC4);
LCD1602_write_data(0 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(money%10 + 0x30);
}
}
void Display_lm35()
{
LCD1602_write_com(0xcc);
lm35=lm35/10;
LCD1602_write_data(lm35*2/100+ 0x30);
LCD1602_write_data(lm35*2%100/10+0x30);
LCD1602_write_data('.');
LCD1602_write_data(lm35*2%10+ 0x30);
}
//数据初始化
void Data_Init()
{
price = 0;
DotPos = 0;
lm35=0;
money=0;
}
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