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制作出來(lái)的實(shí)物圖如下:
仿真原理圖如下(proteus仿真工程文件可到本帖附件中下載)
電子秤元件清單
1) 7*9萬(wàn)用板
2) STC89C51單片機(jī)
3) 40腳IC座
4) 12MHz晶振
5) 30pF瓷片電容*2
6) 10uF電解電容
7) 100uF電解電容
8) 0.36四位一體共陽(yáng)數(shù)碼管
9) 5V有源蜂鳴器
10) 9012三極管*5
11) 5mm紅發(fā)紅LED
12) 按鍵*4
13) 10k電阻*3
14) 2.2k電阻*6
15) HX711模塊
16) 4P單排母座
17) 6P單排母座
18) 壓力傳感器(含支架)
19) 自鎖開(kāi)關(guān)
20) DC電源插座
21) USB電源線
22) 導(dǎo)線
23) 焊錫
單片機(jī)源程序如下:
- #include <reg52.h>
- #include <intrins.h>
- #include <string.h>
- #include "main.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;
- unsigned char p=0;
- //鍵盤(pán)處理變量
- unsigned char keycode;
- unsigned char key_press_num=0;
- uint GapValue,GapValue1;
- bit flag_cz=0;
- uchar code LEDData[]={0x5F,0x44,0x9D,0xD5,0xC6,0xD3,0xDB,0x47,0xDF,0xD7,0xCF,0xDA,0x9B,0xDC,0x9B,0x8B}; //數(shù)碼管顯示碼表
- //定義標(biāo)識(shí)
- volatile bit FlagTest = 0; //定時(shí)測(cè)試標(biāo)志,每0.5秒置位,測(cè)完清0
- volatile bit FlagKeyPress = 0; //有鍵按下標(biāo)志,處理完畢清0
- //校準(zhǔn)參數(shù)
- //因?yàn)椴煌膫鞲衅魈匦郧不是很一致,因此,每一個(gè)傳感器需要矯正這里這個(gè)參數(shù)才能使測(cè)量值更準(zhǔn)確。
- //當(dāng)發(fā)現(xiàn)測(cè)試出來(lái)的重量偏大時(shí),增加該數(shù)值。
- //如果測(cè)試出來(lái)的重量偏小時(shí),減小改數(shù)值。
- //該值可以為小數(shù)
- sbit LED=P1^1;
- sbit ROW1=P3^0;
- sbit ROW2=P3^1;
- sbit ROW3=P3^2;
- sbit DIAN = P0^5; //小數(shù)點(diǎn)
- volatile bit ClearWeighFlag = 0; //傳感器調(diào)零標(biāo)志位,清除0漂
- /******************把數(shù)據(jù)保存到單片機(jī)內(nèi)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);
- }
- /******************把數(shù)據(jù)從單片機(jī)內(nèi)部eeprom中讀出來(lái)*****************/
- void read_eeprom()
- {
- GapValue = byte_read(0x2001);
- GapValue = (GapValue<<8)|byte_read(0x2000);
- a_a = byte_read(0x2060);
- }
- /**************開(kāi)機(jī)自檢eeprom初始化*****************/
- void init_eeprom()
- {
- read_eeprom(); //先讀
- if(a_a != 1) //新的單片機(jī)初始單片機(jī)內(nèi)問(wèn)eeprom
- {
- GapValue = 3500;
- a_a = 1;
- write_eeprom(); //保存數(shù)據(jù)
- }
- }
- /*****顯示開(kāi)機(jī)初始化等待畫(huà)面*****/
- void Disp_init(void)
- {
- P0 = ~0x80; //顯示----
- P2 = 0xBF; //依次打開(kāi)各位
- Delay_ms(1); //延時(shí)
- P2 = 0xEF;
- Delay_ms(1);
- P2 = 0xFB;
- Delay_ms(1);
- P2 = 0xFE;
- Delay_ms(1);
- P2 = 0xFF; //關(guān)閉顯示
- }
- //顯示重量,單位kg,兩位整數(shù),三位小數(shù)
- void Display_Weight()
- {
- P0 = ~LEDData[Weight_Shiwu%10]; //
- P2 = 0xBF; //打開(kāi)位
- Delay_ms(1); //延時(shí)
- P2 = 0xff; //關(guān)閉顯示
- P0=~LEDData[Weight_Shiwu%100/10]; //顯示個(gè)位
- P2 = 0xEF;
- Delay_ms(1);
- P2 = 0xff; //關(guān)閉顯示
- P0 =~LEDData[Weight_Shiwu%1000/100]; //顯示十位
- P2 = 0xFB;
- Delay_ms(1);
- P2 = 0xff; //關(guān)閉顯示
- P0 =~LEDData[Weight_Shiwu%10000/1000]; //顯示百位
- DIAN = 0; //顯示小數(shù)點(diǎn)
- P2 = 0xFE;
- Delay_ms(1);
- P2 = 0xff; //關(guān)閉顯示
- }
- //定時(shí)器0初始化
- void Timer0_Init()
- {
- ET0 = 1; //允許定時(shí)器0中斷
- TMOD = 1; //定時(shí)器工作方式選擇
- TL0 = 0xb0;
- TH0 = 0x3c; //定時(shí)器賦予初值
- TR0 = 1; //啟動(dòng)定時(shí)器
- }
- //定時(shí)器0中斷
- void Timer0_ISR (void) interrupt 1 using 0
- {
- uchar Counter;
- TL0 = 0xb0;
- TH0 = 0x3c; //定時(shí)器賦予初值
- //每0.5秒鐘刷新重量
- Counter ++;
- if (Counter >= 10)
- {
- FlagTest = 1;
- Counter = 0;
- }
- }
- void KeyPress()
- {
- if(ROW1==0) //清零鍵
- {
- Display_Weight();
- if(ROW1==0)
- {
- if(qupi==0)
- qupi=Weight_Shiwu;
- else
- qupi=0;
- Buzzer=0;
- for(p=0;p<10;p++)
- Display_Weight();
- Buzzer=1;
- while(ROW1==0) Display_Weight();
- }
- }
- if(ROW2==0) //加
- {
- Display_Weight();
- 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;
- for(p=0;p<2;p++)
- Display_Weight();
- Buzzer=1;
- for(p=0;p<2;p++)
- Display_Weight();
- Get_Weight();
- }
- }
- Display_Weight();
- Delay_ms(8);
- }
- if(key_press_num!=0)
- {
- key_press_num=0;
- if(GapValue<10000)
- GapValue++;
- Buzzer=0;
- for(p=0;p<10;p++)
- Display_Weight();
- Buzzer=1;
- }
- write_eeprom();
- }
- }
- if(ROW3==0) //減
- {
- Display_Weight();
- 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;
- for(p=0;p<2;p++)
- Display_Weight();
- Buzzer=1;
- for(p=0;p<2;p++)
- Display_Weight();
- Get_Weight();
- }
- }
- Display_Weight();
- Delay_ms(8);
- }
- if(key_press_num!=0)
- {
- key_press_num=0;
- if(GapValue>1)
- GapValue--;
- Buzzer=0;
- for(p=0;p<10;p++)
- Display_Weight();
- Buzzer=1;
- }
- write_eeprom(); //保存數(shù)?
- }
- }
- }
- //****************************************************
- //主函數(shù)
- //****************************************************
- void main()
- {
- init_eeprom(); //開(kāi)始初始化保存的數(shù)據(jù)
- EA = 0;
- Timer0_Init();
- //初中始化完成,開(kāi)斷
- EA = 1;
- Get_Maopi();
- while(1)
- {
- //每0.5秒稱重一次
- if (FlagTest==1)
- {
- Get_Weight();
- FlagTest = 0;
- }
- if(flag_cz==1)
- Disp_init();
- else
- Display_Weight();
- KeyPress();
- }
- }
- //****************************************************
- //稱重
- //****************************************************
- void Get_Weight()
- {
- Weight_Shiwu = HX711_Read();
- Weight_Shiwu = Weight_Shiwu - Weight_Maopi; //獲取凈重
-
- Weight_Shiwu = (unsigned int)((float)(Weight_Shiwu*10)/GapValue)-qupi; //計(jì)算實(shí)物的實(shí)際重量
- if(Weight_Shiwu >= 10000) //超重報(bào)警
- {
- Buzzer = !Buzzer;
- LED=!LED;
- flag_cz=1;
- }
- else
- {
- if(Weight_Shiwu==0)
- LED=0;
- else if(Weight_Shiwu>0)
- LED=1;
- Buzzer = 1;
- flag_cz=0;
- }
- }
- //****************************************************
- //獲取毛皮重量
- //****************************************************
- void Get_Maopi()
- {
- unsigned char clear,f;
- mm: Weight_Maopi_0 = HX711_Read();
- for(clear=0;clear<10;clear++)
- {
- Buzzer=1;
- LED=0;
- for(f=0;f<40;f++)
- Disp_init();
- LED=1;
- for(f=0;f<40;f++)
- Disp_init();
- }
- Weight_Maopi = HX711_Read();
- if((Weight_Maopi*10)/GapValue!=(Weight_Maopi_0*10)/GapValue)
- goto mm;
- Buzzer=0;
- for(f=0;f<10;f++)
- Disp_init();
- Buzzer=1;
- }
- //****************************************************
- //MS延時(shí)函數(shù)(12M晶振下測(cè)試)
- //****************************************************
- void Delay_ms(unsigned int n)
- {
- unsigned int i,j;
- for(i=0;i<n;i++)
- for(j=0;j<121;j++);
- }
復(fù)制代碼
所有資料51hei提供下載:
電子稱(數(shù)碼管).7z
(3.52 MB, 下載次數(shù): 166)
2020-2-15 20:32 上傳
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