基于51單片機HX711傳感器電子秤設計

ID:744211 · 發(fā)表于 2020-5-4 23:15

/**********************************************************************

***********************************************************************/

#include "main.h"
#include "HX711.h"
#include "uart.h"
#include "LCD1602.h"

unsigned long HX711_Buffer = 0;
unsigned long Weight_Maopi = 0;
long Weight_Shiwu = 0;

unsigned char flag = 0;
bit Flag_ERROR = 0;
sbit speak= P1^7;

//校準參數(shù)
//因為不同的傳感器特性曲線不是很一致，因此，每一個傳感器需要矯正這里這個參數(shù)才能使測量值很準確。
//當發(fā)現(xiàn)測試出來的重量偏大時，增加該數(shù)值。
//如果測試出來的重量偏小時，減小改數(shù)值。
//該值可以為小數(shù)
#define GapValue 400

//****************************************************
//主函數(shù)
//****************************************************
void main()
{
Uart_Init();
Send_Word("Welcome to use!\n");
Send_Word("Made by Beetle Electronic Technology!\n");

      Init_LCD1602();
      LCD1602_write_com(0x80);
      LCD1602_write_word("Welcome to use!");
      Delay_ms(1000);                //延時,等待傳感器穩(wěn)定

      Get_Maopi();                               //稱毛皮重量

      while(1)
      {
            EA = 0;
            Get_Weight();                      //稱重
            EA = 1;

            Scan_Key();

            //顯示當前重量
            if( Flag_ERROR == 1)
            {
         Send_Word("ERROR\n");

                     LCD1602_write_com(0x80+0x40);
                     LCD1602_write_word("ERROR ");
                     speak=0;
            }
            else
            {
                           speak=1;
         Send_ASCII(Weight_Shiwu/1000 + 0X30);
         Send_ASCII(Weight_Shiwu%1000/100 + 0X30);
         Send_ASCII(Weight_Shiwu%100/10 + 0X30);
         Send_ASCII(Weight_Shiwu%10 + 0X30);
         Send_Word(" g\n");

                     LCD1602_write_com(0x80+0x40);
                     LCD1602_write_data(Weight_Shiwu/1000 + 0X30);
         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(" g");
            }

      }
}

//掃描按鍵
void Scan_Key()
{
      if(KEY1 == 0)
      {
            Delay_ms(5);
            if(KEY1 == 0)
            {
                     while(KEY1 == 0);
                     Get_Maopi();                      //去皮
            }
      }
}

//****************************************************
//稱重
//****************************************************
void Get_Weight()
{
      Weight_Shiwu = HX711_Read();
      Weight_Shiwu = Weight_Shiwu - Weight_Maopi;             //獲取凈重
      if(Weight_Shiwu > 0)
      {
            Weight_Shiwu = (unsigned int)((float)Weight_Shiwu/GapValue);       //計算實物的實際重量


            if(Weight_Shiwu > 5000)             //超重報警
            {
                     Flag_ERROR = 1;
            }
            else
            {
                     Flag_ERROR = 0;
            }
      }
      else
      {
            Weight_Shiwu = 0;
      //       Flag_ERROR = 1;                               //負重報警
      }

}

//****************************************************
//獲取毛皮重量
//****************************************************
void Get_Maopi()
{
      Weight_Maopi = HX711_Read();
}

//****************************************************
//MS延時函數(shù)(12M晶振下測試)
//****************************************************
void Delay_ms(unsigned int n)
{
      unsigned int  i,j;
      for(i=0;i<n;i++)
            for(j=0;j<123;j++);
}

帳號		自動登錄	找回密碼
密碼			立即注冊