功能：
1.本系统采用STC89C52作为单片机
2.本系统LCD1602液晶实时显示时间和当前重量
3.四个功能按键其中，按‘设置’键进入时间设置，按’去皮’键实现去皮功能
4.系统设置有重量阈值，超重10kg即声光报警
5.采用DC002作为电源接口可直接输入5V给整个系统供电
6.称重传感器采用的是HX711+圆盘称重支架
原理图：
PCB ：
主程序：
#include <reg52.h>#include <intrins.h>#include <string.h>#include "main.h"#include "LCD1602.h"#include "HX711.h"#include "ds1302.h"sbit KEY_CLEAR = P3^7;sbit KEY_ADD = P3^6;sbit KEY_SUB = P3^4;sbit KEY_SET = P3^5;sbit BUZZER = P2^0;unsigned long HX711_Buffer = 0;unsigned long g_weightMaopi = 0;unsigned long g_weightMaopiBuf = 0;long g_weightShiwu = 0;long g_quPi = 0;//键盘处理变量unsigned char g_keyCode;unsigned char g_keyPressNum = 0;unsigned char g_setLocation = 0;unsigned char disTime[16] = " / /: ";bit g_setTimeFlag = 0;bit refreshFlag = 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，减小该数值。//该值可以为小数#define GAP_VALUE 2150 //10kg// #define GAP_VALUE 4250 //5kg#define MAX_WEIGHT 10000 //单位g,不同秤盘支架需要更改// 函数声明void DelayMs(unsigned int n);void Get_Maopi();void Get_Weight();void DisplayWeight();void KeyPress();void Init_Timer0();void DispTime();void SetTime();//主函数void main(){Init_LCD1602(); //初始化LCD1602Init_Timer0();DS1302_Init();//初始化完成// Get_Maopi();LCD1602_WriteCom(0x80);//指针设置LCD1602_WriteWord(" Welcome To Use "); //LCD1602_WriteCom(0x80 + 0x40); //指针设置LCD1602_WriteWord("Wlectronic Scale");// DelayMs(2000);Get_Maopi();DS1302_Read_Time();DispTime();LCD1602_WriteCom(0x80 + 0x40); //指针设置LCD1602_WriteWord("Weight: 0.000kg");// Get_Maopi(); //称毛皮重量while (1){if (refreshFlag){refreshFlag = 0;if (g_setTimeFlag == 1){SetTime();}else{DS1302_Read_Time(); DispTime();TR0 = 0;Get_Weight();TR0 = 1;} }KeyPress();}}//称重void Get_Weight(){g_weightShiwu = HX711_Read();g_weightShiwu = g_weightShiwu - g_weightMaopi; //获取净重g_weightShiwu = ((float)(g_weightShiwu * 10) / GAP_VALUE) - g_quPi; //计算实物的实际重量if (g_weightShiwu <= 0){g_weightShiwu = 0;BUZZER = 1;LCD1602_WriteCom(0x80 + 0x40);LCD1602_WriteWord("Weight: 0.000kg");}else if (g_weightShiwu > MAX_WEIGHT) //超重报警{BUZZER = !BUZZER;LCD1602_WriteCom(0x80 + 0x40 + 8);LCD1602_WriteWord("Error!!!");}else{BUZZER = 1;DisplayWeight();}}//获取毛皮重量void Get_Maopi(){unsigned char clear;mm:g_weightMaopiBuf = HX711_Read();for (clear = 0; clear < 10; clear++){BUZZER = 1;DelayMs(100);}g_weightMaopi = HX711_Read();if (g_weightMaopi / GAP_VALUE != g_weightMaopiBuf / GAP_VALUE){goto mm;}BUZZER = 0;DelayMs(500);BUZZER = 1;}//MS延时函数(11.0592M晶振下测试)void DelayMs(unsigned int n){unsigned int i, j;for (i = 0; i < n; i++)for (j = 0; j < 121; j++);}void DispTime(){disTime[1] = '0' + timeBufDec[1] / 10;disTime[2] = '0' + timeBufDec[1] % 10;disTime[4] = '0' + timeBufDec[2] / 10;disTime[5] = '0' + timeBufDec[2] % 10;disTime[7] = '0' + timeBufDec[3] / 10;disTime[8] = '0' + timeBufDec[3] % 10;disTime[10] = '0' + timeBufDec[4] / 10;disTime[11] = '0' + timeBufDec[4] % 10;disTime[13] = '0' + timeBufDec[5] / 10;disTime[14] = '0' + timeBufDec[5] % 10;LCD1602_WriteCom(0x80); //指针设置LCD1602_WriteWord(disTime);}void SetTime(){LCD1602_WriteCom(0x0F);switch (g_setLocation){case 1: LCD1602_WriteCom(0x80 + 2); break;case 2: LCD1602_WriteCom(0x80 + 5); break;case 3: LCD1602_WriteCom(0x80 + 8); break;case 4: LCD1602_WriteCom(0x80 + 11); break;case 5: LCD1602_WriteCom(0x80 + 14); break;case 6: LCD1602_WriteCom(0x0C); DelayMs(5); DS1302_Write_Time(); g_setLocation = 0; g_setTimeFlag = 0; break;default: ;}}//显示重量，单位kg，两位整数，三位小数void DisplayWeight(){LCD1602_WriteCom(0x80 + 0x40);LCD1602_WriteWord("Weight: ");if (g_weightShiwu / 10000 == 0){LCD1602_WriteData(' ');}else{LCD1602_WriteData(g_weightShiwu / 10000 + '0');}LCD1602_WriteData(g_weightShiwu % 10000 / 1000 + '0');LCD1602_WriteData('.');LCD1602_WriteData(g_weightShiwu % 1000 / 100 + '0');LCD1602_WriteData(g_weightShiwu % 100 / 10 + '0');LCD1602_WriteData(g_weightShiwu % 10 + '0');LCD1602_WriteData('k');LCD1602_WriteData('g');}void KeyPress(){if (KEY_SET == 0) //设置键{DelayMs(5);if (KEY_SET == 0){if (g_setTimeFlag == 0){g_setTimeFlag = 1;g_setLocation = 1;}else if (g_setTimeFlag == 1){g_setLocation++;}}while (!KEY_SET);}if (!KEY_CLEAR) //去皮键{DelayMs(5);if (!KEY_CLEAR){// Get_Maopi();if (g_setTimeFlag == 1){g_setLocation = 6;}else{if (g_quPi == 0){g_quPi = g_weightShiwu;}else{g_quPi = 0;}}}while (!KEY_CLEAR);}if (!KEY_ADD) //加{DelayMs(180);if (!KEY_ADD){if (g_setTimeFlag){switch (g_setLocation){case 1: {timeBufDec[1]++;if (timeBufDec[1] > 99){timeBufDec[1] = 0;}break;}case 2: {timeBufDec[2]++;if (timeBufDec[2] > 12){timeBufDec[2] = 1;}break;}case 3: {timeBufDec[3]++;if (timeBufDec[3] > YDay(timeBufDec[1], timeBufDec[2])){timeBufDec[3] = 1;}break;}case 4: {timeBufDec[4]++;if (timeBufDec[4] > 23){timeBufDec[4] = 0;}break;}case 5: {timeBufDec[5]++;if (timeBufDec[5] > 59){timeBufDec[5] = 0;}break;}}}DispTime();}// while (!KEY_ADD);}if (!KEY_SUB) //减{DelayMs(180);if (!KEY_SUB){if (g_setTimeFlag){switch (g_setLocation){case 1:{if (timeBufDec[1] == 0){timeBufDec[1] = 100;}timeBufDec[1]--;break;}case 2:{timeBufDec[2]--;if (timeBufDec[2] < 1){timeBufDec[2] = 12;}break;}case 3:{timeBufDec[3]--;if (timeBufDec[3] < 1){timeBufDec[3] = YDay(timeBufDec[1], timeBufDec[2]);}break;}case 4:{if (timeBufDec[4] == 0){timeBufDec[4] = 24;}timeBufDec[4]--;break;}case 5:{if (timeBufDec[5] == 0){timeBufDec[5] = 60;}timeBufDec[5]--;break;}}}DispTime();}// while (!KEY_SUB);}}//定时器0初始化void Init_Timer0(){ET0 = 1; //允许定时器0中断TMOD &= 0xF0;TMOD |= 0x01; //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EA = 1;}//定时器0中断void Timer0_ISR(void) interrupt 1{static unsigned char cnt1;TL0 = 0xb0;TH0 = 0x3c; //定时器赋予初值cnt1++;if (cnt1 >= 4){refreshFlag = 1;cnt1 = 0;}}
仿真演示视频：
/video/BV1qP411g7Wn/
实物演示视频：
/video/BV1XD4y1W74Y/
