基于HX711+51单片机电子秤仿真制作源码 -

#include <reg52.h>
#include <intrins.h>
#include <string.h>
#include "main.h"
#include "LCD1602.h"
#include "HX711.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;
long Weight_Shiwu = 0;
unsigned int qupi=0;
//键盘处理变量
unsigned char keycode;
unsigned char key_press_num=0;
uint GapValue,GapValue1;
//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;
sbit ROW1=P3^0;
sbit ROW2=P3^1;
sbit ROW3=P3^2;
sbit ROW4=P3^3;
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(0x2000);
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
}
}
//显示重量，单位kg，两位整数，三位小数
void Display_Weight()
{
LCD1602_write_com(0x80+0x40+8);
if(Weight_Shiwu/10000==0)
LCD1602_write_data(' ');
else
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);
}
//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：
// 7 8 9 10(清0)
// 4 5 6 11(删除)
// 1 2 3 12(未定义)
// 14(未定义) 0 15(.) 13(确定价格)
void KeyPress()
{
if(ROW1==0) //去皮键
{
Delay_ms(5);
if(ROW1==0)
{
// Get_Maopi();
if(qupi==0)
qupi=Weight_Shiwu;
else
qupi=0;
Buzzer=0;
Delay_ms(50);
Buzzer=1;
while(ROW1==0);
}
}
if(ROW2==0) //加
{
Delay_ms(5);
if(ROW2==0)
{
while(!ROW2)
{
key_press_num++;
if(key_press_num>=100)
{
key_press_num=0;
while(!ROW2)
{
if(GapValue<10000)
GapValue+=10;
Buzzer=0;
Delay_ms(10);
Buzzer=1;
Delay_ms(10);
Get_Weight();
}
}
Delay_ms(10);
}
if(key_press_num!=0)
{
key_press_num=0;
if(GapValue<10000)
GapValue++;
Buzzer=0;
Delay_ms(50);
Buzzer=1;
}
write_eeprom();
}
}
if(ROW3==0) //减
{
Delay_ms(5);
if(ROW3==0)
{
while(!ROW3)
{
key_press_num++;
if(key_press_num>=100)
{
key_press_num=0;
while(!ROW3)
{
if(GapValue>1)
GapValue-=10;
Buzzer=0;
Delay_ms(10);
Buzzer=1;
Delay_ms(10);
Get_Weight();
}
}
Delay_ms(10);
}
if(key_press_num!=0)
{
key_press_num=0;
if(GapValue>1)
GapValue--;
Buzzer=0;
Delay_ms(50);
Buzzer=1;
}
write_eeprom(); //保存数?
}
}
}
//****************************************************
//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;
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("The Weight: ");
LCD1602_write_com(0x80+0x40); //指针设置
LCD1602_write_word(" 0.000kg");
// Get_Maopi(); //称毛皮重量
while(1)
{
//每0.5秒称重一次
if (FlagTest==1)
{
Get_Weight();
FlagTest = 0;
}
KeyPress();
}
}
//****************************************************
//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(0x80+0x40+8);
LCD1602_write_word("--.---");
}
else
{
if(Weight_Shiwu==0)
LED=0;
else if(Weight_Shiwu>0)
LED=1;
Buzzer = 1;
Display_Weight();
}
}
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