51单片机+HX711称重传感器的电子秤设计与制作详解含源码实物原理图等资料 -

#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"
#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
//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=P1^1;
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(0x83);
LCD1602_write_data(Weight_Shiwu/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);
}
//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(0x80+0x40+6);
LCD1602_write_word("---.-");
return;
}
if (money>=1000)
{
LCD1602_write_com(0x80+0x40+6);
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(0x80+0x40+6);
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(0x80+0x40+6);
LCD1602_write_data(0x20);
LCD1602_write_com(0x80+0x40+7);
LCD1602_write_data(0x20);
LCD1602_write_data(money%100/10 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(money%10+ 0x30);
}
else
{
LCD1602_write_com(0x80+0x40+6);
LCD1602_write_data(0x20);
LCD1602_write_com(0x80+0x40+7);
LCD1602_write_data(0x20);
LCD1602_write_com(0x80+0x40+8);
LCD1602_write_data(0 + 0x30);
LCD1602_write_data('.');
LCD1602_write_data(money%10 + 0x30);
}
}
//数据初始化
void Data_Init()
{
price = 0;
DotPos = 0;
}
//定时器0初始化
void Timer0_Init()
{
ET0 = 1; //允许定时器0中断
TMOD = 1; //定时器工作方式选择
TL0 = 0xb0;
TH0 = 0x3c; //定时器赋予初值
TR0 = 1; //启动定时器
}
//定时器0中断
void Timer0_ISR (void) interrupt 1 using 0
{
uchar Counter;
TL0 = 0xb0;
TH0 = 0x3c; //定时器赋予初值
//每0.5秒钟刷新重量
Counter ++;
if (Counter >= 10)
{
FlagTest = 1;
Counter = 0;
}
}
//按键响应程序，参数是键值
//返回键值：
// 1 2 3 10 //10:清零重量，兼去皮功能
// 4 5 6 11 //11:清除单价
// 7 8 9 12 //12:显示数值偏大调节按键
// 14 0 15 13 //14:无功能（用于扩展）15：小数点 13：显示数值偏小调节按键
void KeyPress(uchar keycode)
{
switch (keycode)
{
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9: //目前在设置整数位，要注意price是整型，存储单位为分
if (DotPos == 0)
{ //最多只能设置到千位
if (price<100)
{
price=price*10+keycode*10;
}
}//目前在设置小数位
else if (DotPos==1) //小数点后第一位
{
price=price+keycode;
DotPos=2;
}
Display_Price();
break;
case 10: //去皮键
if(qupi==0)
qupi=Weight_Shiwu;
else
qupi=0;
Display_Price();
// FlagSetPrice = 0;
DotPos = 0;
break;
case 11: //删除键
price=0;
DotPos=0;
Display_Price();
break;
case 12: //加
if(GapValue<10000)
GapValue++;
break;
case 13: //减
if(GapValue>1)
GapValue--;
break;
case 15: //小数点按下
DotPos = 1; //小数点后第一位
break;
}
}
//****************************************************
//主函数
//****************************************************
void main()
{
init_eeprom(); //开始初始化保存的数据
Init_LCD1602(); //初始化LCD1602
EA = 0;
Data_Init();
Timer0_Init();
//初中始化完成，开断
EA = 1;
// Get_Maopi();
LCD1602_write_com(0x80); //指针设置
LCD1602_write_word(" Welcome To Use "); //
LCD1602_write_com(0x80+0x40); //指针设置
LCD1602_write_word("Electronic Scale");
// Delay_ms(2000);
Get_Maopi();
LCD1602_write_com(0x80); //指针设置
LCD1602_write_word("WE:0.000 PR:00.0");
LCD1602_write_com(0x80+0x40); //指针设置
LCD1602_write_word("MONEY: 0.00 ");
Display_Price();
// Get_Maopi(); //称毛皮重量
while(1)
{
//每0.5秒称重一次
if (FlagTest==1)
{
Get_Weight();
FlagTest = 0;
}
keycode = Getkeyboard();
//有效键值0-15
if (keycode<16)
{
KeyPress(keycode);
Buzzer=0;
Delay_ms(100);
Buzzer=1;
while(keycode<16)
{
if(keycode==12||keycode==13)
{
Buzzer=0;
Delay_ms(10);
Buzzer=1;
KeyPress(keycode);
Get_Weight();
flag_key=1;
}
keycode = Getkeyboard();
}
write_eeprom(); //保存数据
}
}
}
//****************************************************
//称重
//****************************************************
void Get_Weight()
{
Weight_Shiwu = HX711_Read();
Weight_Shiwu = Weight_Shiwu - Weight_Maopi; //获取净重
Weight_Shiwu = (unsigned int)((float)Weight_Shiwu*10/GapValue)-qupi; //计算实物的实际重量
if(Weight_Shiwu > 10000) //超重报警
{
Buzzer = !Buzzer;
LED=!LED;
LCD1602_write_com(0x83);
LCD1602_write_word("-.---");
}
else
{
if(Weight_Shiwu==0)
LED=1;
else if(Weight_Shiwu>0)
LED=0;
Buzzer = 1;
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