基于51单片机宠物喂食系统设计

#include <reg52.h>#include "lcd1602.h"#include "hx711.h"#include "dht11.h"#include "uart.h"#include "key.h"#include "motor.h"void main(){float weight;unsigned char hour, minute, second;float set_weight = 50.0;   //默认喂食重量LCD_Init();HX711_Init();DHT11_Init();Motor_Init();Timer_Init();while(1){//读取时间GetTime(&hour,&minute,&second);//读取重量weight = HX711_GetWeight();//读取温湿度DHT11_Read();//显示数据LCD_ShowTime(1,1,hour,minute,second);LCD_ShowWeight(2,1,weight);LCD_ShowTempHumi(1,10);//自动喂食判断if(CheckFeedTime(hour,minute,second)){if(weight < set_weight){Motor_RunForward();while(weight < set_weight){weight = HX711_GetWeight();}Motor_RunBackward();}}//手动喂食if(Key_Scan() == MANUAL_FEED){Motor_RunForward();while(weight < set_weight){weight = HX711_GetWeight();}Motor_RunBackward();}}}

3.2 LCD显示程序

LCD驱动程序实现初始化、写命令、写数据、显示字符串、显示数值等功能。

#include "lcd1602.h"
#include <reg52.h>sbit RS = P2^6;sbit RW = P2^5;sbit E  = P2^7;void LCD_WriteCmd(unsigned char cmd){RS = 0; RW = 0;P0 = cmd;E = 1; DelayMs(1); E = 0;}void LCD_WriteData(unsigned char dat){RS = 1; RW = 0;P0 = dat;E = 1; DelayMs(1); E = 0;}void LCD_Init(void){LCD_WriteCmd(0x38);LCD_WriteCmd(0x0C);LCD_WriteCmd(0x06);LCD_WriteCmd(0x01);}void LCD_ShowString(unsigned char row, unsigned char col, unsigned char *str){unsigned char addr;if(row==1) addr = 0x80+(col-1);else addr = 0xC0+(col-1);LCD_WriteCmd(addr);while(*str) LCD_WriteData(*str++);}

3.3 HX711重量采集程序

#include "hx711.h"
#include <reg52.h>sbit HX711_DT = P3^2;sbit HX711_SCK = P3^3;void HX711_Init(void){HX711_SCK = 0;}long HX711_Read(void){unsigned long count=0;unsigned char i;while(HX711_DT);for(i=0;i<24;i++){HX711_SCK=1;count=count<<1;HX711_SCK=0;if(HX711_DT) count++;}HX711_SCK=1;count ^= 0x800000;HX711_SCK=0;return count;}float HX711_GetWeight(void){long value = HX711_Read();return (float)(value/1000.0); //通过标定系数调整}

3.4 DHT11温湿度采集程序

#include "dht11.h"
#include <reg52.h>sbit DHT11_IO = P3^4;unsigned char DHT11_ReadByte(void){unsigned char i,dat=0;for(i=0;i<8;i++){while(!DHT11_IO);DelayUs(30);if(DHT11_IO) dat|=(1<<(7-i));while(DHT11_IO);}return dat;}void DHT11_Read(void){unsigned char temp, humi;//初始化时序DHT11_IO=0; DelayMs(20);DHT11_IO=1; DelayUs(30);//读取湿度整数部分humi = DHT11_ReadByte();temp = DHT11_ReadByte();LCD_ShowHumi(2,10,humi);LCD_ShowTemp(2,14,temp);}

3.5 电机驱动程序

#include "motor.h"
#include <reg52.h>sbit IN1 = P1^0;sbit IN2 = P1^1;void Motor_Init(void){IN1=0; IN2=0;}void Motor_RunForward(void){IN1=1; IN2=0;}void Motor_RunBackward(void){IN1=0; IN2=1;}

3.6 按键检测程序

#include "key.h"
#include <reg52.h>sbit KEY1 = P3^5; //设置时间sbit KEY2 = P3^6; //设置重量sbit KEY3 = P3^7; //手动喂食unsigned char Key_Scan(void){if(KEY1==0){DelayMs(10); if(KEY1==0) return SET_TIME;}if(KEY2==0){DelayMs(10); if(KEY2==0) return SET_WEIGHT;}if(KEY3==0){DelayMs(10); if(KEY3==0) return MANUAL_FEED;}return 0;}