基于单片机 51 的称重系统设计与实现

#include <reg52.h> #include <intrins.h> #include <string.h> #include "main.h" #include "LCD1602.h" #include "HX711.h" #include "eeprom52.h" typedef unsigned char uchar; typedef unsigned int uint; uchar code table[] = {'Welcome!'}; uchar code ren[] = {'RenShu:'}; uchar code dat[2]; long Weight_Shiwu =0; volatile bit FlagTest = 0; uint GapValue,GapValue1; sbit RS = P2^6; //RS? sbit RW = P2^5; sbit EN = P2^7; //EN?¡¢

int z=0;

sbit k1=P3^0; sbit k2=P3^1; sbit k3=P3^3;

sbit led1=P2^0; sbit led2=P2^1; sbit led3=P2^2; long c_new; uint num,i,c; uint GapValue,GapValue1; 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); }

/*°ÑÊý¾Ý´Óµ¥Æ¬»úÄÚ²¿eepromÖжÁ³öÀ´/ void read_eeprom() { GapValue = byte_read(0x2001); GapValue = (GapValue<<8)|byte_read(0x2000); a_a = byte_read(0x2060); }

/¿ª»ú×Ô¼ìeeprom³õʼ»¯***/ void init_eeprom() { read_eeprom(); //ÏȶÁ if(a_a != 1) //еĵ¥Æ¬»ú³õʼµ¥Æ¬»úÄÚÎÊeeprom { GapValue = 3500; a_a = 1; write_eeprom(); //±£´æÊý¾Ý } } void Timer0_Init() { ET0 = 1; //ÔÊÐí¶¨Ê±Æ÷0ÖÐ¶Ï TMOD = 1; //¶¨Ê±Æ÷¹¤×÷·½Ê½Ñ¡Ôñ TL0 = 0xb0;
TH0 = 0x3c; //¶¨Ê±Æ÷¸³Óè³õÖµ TR0 = 1; //Æô¶¯¶¨Ê±Æ÷ }

void delay(uint z) { uint x,y; for(x = z; x > 0; x--) for(y = 114; y > 0 ; y--); } void Read_Busy() { uchar busy; P0 = 0xff; RS = 0; RW = 1; do { EN = 1; busy = P0; EN = 0; }while(busy & 0x80); } void Write_Cmd(uchar cmd) { Read_Busy();//??? RS = 0; RW = 0; P0 = cmd; EN = 1; EN = 0; } //??????? void Write_Dat(uchar dat) { Read_Busy(); RS = 1; RW = 0; P0 = dat; EN = 1; EN = 0; } void Init_LCD1602() {

    EN=0;
    Write_Cmd(0x38); //        ??16*2??,5*7??,8?????
    Write_Cmd(0x0c);        
    Write_Cmd(0x06); //???????????1
    Write_Cmd(0x01); //????

} void key1() { if(k1==0) { delay(5); if(k1==0) { c++; } while(!k1); } if(k2==0) { delay(5); if(k2==0) { c--; } while(!k2); } } void key2() { if(k3 == 0) { delay(5); if(k3 == 0) { if(c > Weight_Shiwu) { led1 = 1; led2 = 0; led3 = 0; } else if(c < Weight_Shiwu) { led1 = 0; led2 = 1; led3 = 0; } else // c == a { led1 = 0; led2 = 0; led3 = 1; } } while(!k3); } }

void Get_Weighte() { Weight_Shiwu = HX711_Read(); //»ñÈ¡¾»ÖØ

Weight_Shiwu = (unsigned int)((float)((Weight_Shiwu*10)/GapValue)-24847)/1000; 	//¼ÆËãʵÎïµÄʵ¼ÊÖØÁ¿																

} void main() { init_eeprom(); //¿ªÊ¼³õʼ»¯±£´æµÄÊý¾Ý Init_LCD1602(); //³õʼ»¯LCD1602 EA = 0; Timer0_Init(); //³õÖÐʼ»¯Íê³É£¬¿ª¶Ï EA = 1; c=0; while(1) { Write_Cmd(0x80 | 0x00);//???? for(num=0;num<8;num++) { Write_Dat(table[num]); delay(5);
} Write_Cmd(0x80 | 0x40);//???? for(i=0;i<7;i++) { Write_Dat(ren[i]); delay(5);
} Write_Cmd(0x80 | 0x48);//??????0x00,?????????????

    key1();
    Write_Dat(c/10+0x30);
Write_Dat(c%10+0x30);

		if (FlagTest==1)
	{
		Get_Weighte();
	
		FlagTest = 0;
	
			if(c > Weight_Shiwu)
			{
				led1 = 1;
				led2 = 0;
				led3 = 0;
			}
			else if(c < Weight_Shiwu)
			{
				led1 = 0;
				led2 = 1;
				led3 = 0;
			}
			else // c == a
			{
				led1 = 0;
				led2 = 0;
				led3 = 1;
			}
		}
	key2();
}