HX711压力传感器+51单片机程序

ID:872202 · 发表于 2021-1-2 15:38

数模转换元件为HX711
程序：
#include <reg51.h>
#include <intrins.h>
sbit HX711_DOUT=P2^1;
sbit HX711_SCK=P2^0;
unsigned long HX711_Buffer = 0;
unsigned long Weight_Maopi = 0;
long Weight_Shiwu = 0;
unsigned char flag = 0;
bit Flag_ERROR = 0;
void Delay_ms(unsigned int);
#define GapValue 400
sbit KEY1=P3^2;
sbit LCD1602_RS=P2^6;
sbit LCD1602_RW=P2^5;
sbit LCD1602_EN=P2^7;

unsigned char Num = 0;
bit Flag_Receive_OK = 0;

void Uart_Init(void);
void Send_Word(unsigned char *p);
void Get_Weight();
void Scan_Key();
void Get_Maopi();
void Send_ASCII(unsigned char c);
void LCD1602_delay_ms(unsigned int n);
void LCD1602_write_com(unsigned char com);
void LCD1602_write_data(unsigned char dat);
void LCD1602_write_word(unsigned char *s);
void Init_LCD1602();
void Delay__hx711_us(void);
unsigned long HX711_Read(void);

void main()
{
   Uart_Init();
Send_Word("Welcome to use!\n");

      Init_LCD1602();
      LCD1602_write_com(0x80);
      LCD1602_write_word("  2021-1-4 ");
      Delay_ms(1000);                //延时,等待传感器稳定

      Get_Maopi();                               //称毛皮重量

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

            Scan_Key();

            if( Flag_ERROR == 1)
            {
         Send_Word("ERROR\n");

                     LCD1602_write_com(0x80+0x40);
                     LCD1602_write_word("ERROR ");

            }
            else
            {

         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(" MPa\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(" MPa");
            }

      }
}

//扫描按键
void Scan_Key()
{
      if(KEY1 == 0)
      {
            Delay_ms(5);
            if(KEY1 == 0)
            {
                     while(KEY1 == 0);
                     Get_Maopi();
            }
      }
}

void Get_Weight()
{
      Weight_Shiwu = HX711_Read();
            Weight_Shiwu = Weight_Shiwu - Weight_Maopi;
      if(Weight_Shiwu > 0)
      {
            Weight_Shiwu = (unsigned int)((float)Weight_Shiwu/GapValue);


            if(Weight_Shiwu > 5000)
            {
                     Flag_ERROR = 1;
            }
            else
            {
                     Flag_ERROR = 0;
            }
      }
      else
      {
            Weight_Shiwu = 0;
      }

}

void Get_Maopi()
{
      Weight_Maopi = HX711_Read();
}

void Delay_ms(unsigned int n)
{
      unsigned int  i,j;
      for(i=0;i<n;i++)
            for(j=0;j<123;j++);
}

void LCD1602_delay_ms(unsigned int n)
{
      unsigned int  i,j;
      for(i=0;i<n;i++)
            for(j=0;j<123;j++);
}

//写指令

void LCD1602_write_com(unsigned char com)
{
LCD1602_RS = 0;
      LCD1602_delay_ms(1);
      LCD1602_EN = 1;
P0 = com;
      LCD1602_delay_ms(1);
      LCD1602_EN = 0;
}

//写数据

void LCD1602_write_data(unsigned char dat)
{
      LCD1602_RS = 1;
      LCD1602_delay_ms(1);
      P0 = dat;
      LCD1602_EN = 1;
      LCD1602_delay_ms(1);
      LCD1602_EN = 0;
}

//连续写字符

void LCD1602_write_word(unsigned char *s)
{
      while(*s>0)
      {
            LCD1602_write_data(*s);
            s++;
      }
}

void Init_LCD1602()
{
      LCD1602_EN = 0;
      LCD1602_RW = 0;                                              //设置为写状态
      LCD1602_write_com(0x38);                      //显示模式设定
      LCD1602_write_com(0x0c);                      //开关显示、光标有无设置、光标闪烁设置
      LCD1602_write_com(0x06);                      //写一个字符后指针加一
      LCD1602_write_com(0x01);                      //清屏指令
}

void Uart_Init(void)
{
      SCON = 0X50;  //UART方式1；8位UART
      REN  = 0;    //不允许串行口接收数据
      PCON = 0x00;  //SMOD=0;波特率不加倍
      TMOD = 0x21;  //T1方式2，用于产生波特率
      TH1  = 0xFD;  //装初值
      TL1  = 0xFD;
      TR1  = 1;    //启动定时器1
      EA = 1;    //打开全局中断控制
      ES = 0;    //串行口中断
}

void Send_Word(unsigned char *p)                               //发送字符串
{
      while(*p)
      {
               SBUF=*(p++);
            while(TI==0)
            {
                     ;
                     ;
                     ;
            };
            TI=0;
      }
}

void Send_ASCII(unsigned char c)                               //发送一个字符
{
TI=0;
SBUF=c;
while(TI==0);
TI=0;
}

void Delay__hx711_us(void)
{
      _nop_();
      _nop_();
}

//读取HX711
unsigned long HX711_Read()
{
      unsigned long count;
      unsigned char i;
      HX711_DOUT=1;
      Delay__hx711_us();
      HX711_SCK=0;
      count=0;
      EA = 1;
      while(HX711_DOUT);
      EA = 0;
      for(i=0;i<24;i++)
      {
               HX711_SCK=1;
               count=count<<1;
            HX711_SCK=0;
               if(HX711_DOUT)
                     count++;
      }
      HX711_SCK=1;
count=count^0x800000;
      Delay__hx711_us();
      HX711_SCK=0;
      return(count);
}

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