功能介绍：
0.本系统采用STC89C52作为单片机
1.支持手动/自动两种模式
2.自动模式下，系统实时监测当前各个方位的光强信息，并通过串口上报
3.自动模式下，通过判断各方位的光强，转动步进电机调节太阳能板，实现追光的效果
4.采用DC002作为电源接口可直接输入5V给整个系统供电
原理图：
PCB：
主程序：
#include <reg52.h>#include <stdio.h>#include "PCF8591.H"#define uchar unsigned char#define uint unsigned int#define PCF8591 0x90 // PCF8591 地址sbit KEY_MODE = P3^3; sbit KEY_UP = P3^4;sbit KEY_DOWN = P3^5;sbit KEY_LEFT = P3^6;sbit KEY_RIGHT = P3^7;sbit LED1 = P1^0;sbit LED2 = P1^1;uchar Motor_Up[4]={0x08,0x04,0x02,0x01};uchar Motor_Down[4]={0x01,0x02,0x04,0x08};uchar Motor_Left[4] = {0x10, 0x20, 0x40, 0x80};uchar Motor_Right[4] = {0x80, 0x40, 0x20, 0x10};unsigned char AD_CHANNEL;//延时函数void Delay_ms(uint jj){uint ii;while (jj--)for (ii = 0; ii < 125; ii++);}void UART_Init(void){TMOD = 0x20; //定时器模式选择PCON = 0x00;SCON = 0x50;TH1 = 0xFd; //设置波特率 9600TL1 = 0xFd;TR1 = 1; //启动定时器1ES = 0; //开串口中断EA = 1; //开总中断}/********************************************************************* 名称 : PSend_Hex()* 功能 : 发送字符串函数,可控制发送长度* 变量 : 无* 返回值 : 无********************************************************************/void Send_Hex(unsigned char *p, unsigned char num){while (num--) //剩余发送的字符数{SBUF = *p; //将要发送的数据赋给串口缓冲寄存器while (!TI);//等待发送结束TI = 0; //软件清零p++;//指针加一}}void main() //函数功能：主函数{bit modeFlag = 0;uchar AD_Up, AD_Down, AD_Left, AD_Right;uchar i, j;uchar Table[4];Delay_ms(2000);UART_Init();while (1){if (!KEY_MODE){Delay_ms(20);while (!KEY_MODE);modeFlag = ~modeFlag; //模式切换}if (modeFlag == 0) //自动{LED1 = 1;LED2 = 0;for (i = 0; i < 8; i++){switch (AD_CHANNEL){case 0:AD_Up = ReadADC(0) * 2; // ADC0 模数转换1break;case 1:AD_Down = ReadADC(1) * 2; // ADC1 模数转换2break;case 2:AD_Left = ReadADC(2) * 2; // ADC2 模数转换3break;case 3:AD_Right = ReadADC(3) * 2; // ADC3 模数转换4break;}Send_Hex(Table, 4);if (++AD_CHANNEL > 3){AD_CHANNEL = 0;Table[0] = AD_Up;Table[1] = AD_Down;Table[2] = AD_Left;Table[3] = AD_Right;}}}else //手动{LED1 = 0;LED2 = 1;AD_Up = 0; //上AD_Down = 0; //下AD_Left = 0; //左AD_Right = 0; //右}///if ((AD_Up > 220) || (AD_Down > 220) || (AD_Left > 220) || (AD_Right > 220)){AD_Up = 0; //上AD_Down = 0; //下AD_Left = 0; //左AD_Right = 0; //右}if (((AD_Up < AD_Down) && (AD_Down - AD_Up > 10)) || (!KEY_UP)) //上转{for (i = 0; i < 10; i++){for (j = 0; j < 4; j++){P2 = Motor_Up[j];Delay_ms(3);}}P2 = 0X00;}//if (((AD_Up > AD_Down) && (AD_Up - AD_Down > 10)) || (!KEY_DOWN)) //下转{for (i = 0; i < 10; i++){for (j = 0; j < 4; j++){P2 = Motor_Down[j];Delay_ms(3);}}P2 = 0X00;}/if (((AD_Left < AD_Right) && (AD_Right - AD_Left > 10)) || (!KEY_LEFT)) //左转{for (i = 0; i < 10; i++){for (j = 0; j < 4; j++){P2 = Motor_Left[j];Delay_ms(3);}}P2 = 0X00;}//if (((AD_Left > AD_Right) && (AD_Left - AD_Right > 10)) || (!KEY_RIGHT)) //右转{for (i = 0; i < 10; i++){for (j = 0; j < 4; j++){P2 = Motor_Right[j];Delay_ms(3);}}P2 = 0X00;}Delay_ms(100); //延时，可适当修改}}
仿真演示视频：
/video/BV11V4y1K7cm/
实物演示视频：
/video/BV1sN4y1K7KW/
