基于tlc2543连接51单片机实现光伏MPPT的C语言代码

下面是基于TLC2543连接51单片机实现光伏MPPT的C语言代码：

#include <reg51.h>
#include <intrins.h>

#define FOSC 22118400L //系统时钟频率

sbit DCLK = P2^0; //定义时钟信号端口
sbit DIN = P2^1; //定义数据输入端口
sbit CS = P2^2; //定义片选信号端口
sbit M1 = P1^0; //定义步进电机控制信号端口1
sbit M2 = P1^1; //定义步进电机控制信号端口2

unsigned char AD_Result_H, AD_Result_L, AD_Value_H, AD_Value_L;
unsigned int AD_Value;

void Delay_us(unsigned int n) //微秒级延时函数
{
    while(n--)
    {
        _nop_();
    }
}

void Delay_ms(unsigned int n) //毫秒级延时函数
{
    unsigned char i, j;
    while(n--)
    {
        i = 22;
        j = 128;
        do
        {
            while (--j);
        } while (--i);
    }
}

void InitADC() //初始化ADC
{
    CS = 1; //片选信号置高
    DCLK = 1; //时钟信号置高
    DIN = 1; //数据输入信号置高
}

unsigned int ReadADC(unsigned char Channel) //读取ADC
{
    unsigned char i;
    unsigned int AD_Value = 0;
    unsigned long AD_Result;
    CS = 0; //片选信号置低
    DCLK = 0; //时钟信号置低
    DIN = 1; //数据输入信号置高
    DCLK = 1; //时钟信号置高
    DCLK = 0; //时钟信号置低
    DIN = 1; //数据输入信号置高
    DCLK = 1; //时钟信号置高
    DCLK = 0; //时钟信号置低
    DIN = (0x08 | Channel) << 4; //发送通道号
    for(i = 0; i < 12; i++)
    {
        DCLK = 1; //时钟信号置高
        AD_Result <<= 1;
        if(DIN & 0x80) AD_Result++;
        DCLK = 0; //时钟信号置低
    }
    for(i = 0; i < 4; i++)
    {
        DCLK = 1; //时钟信号置高
        AD_Result <<= 1;
        if(DIN & 0x80) AD_Result++;
        DCLK = 0; //时钟信号置低
    }
    CS = 1; //片选信号置高
    AD_Value = (unsigned int)(AD_Result >> 3);
    AD_Value_H = (unsigned char)(AD_Value >> 8);
    AD_Value_L = (unsigned char)(AD_Value & 0x00ff);
    return AD_Value;
}

void main()
{
    unsigned int i, j, k;
    unsigned int AD_Value1, AD_Value2;
    unsigned int Max_Power, Max_Power_Last;
    unsigned char Direction;
    InitADC(); //初始化ADC
    while(1)
    {
        Max_Power = 0;
        Direction = 0;
        for(i = 0; i < 100; i++) //扫描电压范围
        {
            M1 = 1;
            M2 = 0;
            Delay_us(500);
            AD_Value1 = ReadADC(0); //读取电压值
            Delay_us(500);
            AD_Value2 = ReadADC(1); //读取电流值
            k = AD_Value1 * AD_Value2;
            if(k > Max_Power) //寻找最大功率点
            {
                Max_Power = k;
                Direction = 0;
            }
            M1 = 0;
            M2 = 1;
            Delay_us(500);
            AD_Value1 = ReadADC(0); //读取电压值
            Delay_us(500);
            AD_Value2 = ReadADC(1); //读取电流值
            k = AD_Value1 * AD_Value2;
            if(k > Max_Power) //寻找最大功率点
            {
                Max_Power = k;
                Direction = 1;
            }
        }
        if(Max_Power > Max_Power_Last) //判断是否需要调整步进电机
        {
            Max_Power_Last = Max_Power;
            if(Direction == 0) //调整步进电机
            {
                for(j = 0; j < 20; j++)
                {
                    M1 = 1;
                    M2 = 0;
                    Delay_ms(5);
                    M1 = 0;
                    M2 = 0;
                    Delay_ms(5);
                }
            }
            else
            {
                for(j = 0; j < 20; j++)
                {
                    M1 = 0;
                    M2 = 1;
                    Delay_ms(5);
                    M1 = 0;
                    M2 = 0;
                    Delay_ms(5);
                }
            }
        }
        else
        {
            break;
        }
    }
}

这段代码实现了基于TLC2543连接51单片机的光伏MPPT，具体实现过程为：扫描电压范围，寻找最大功率点，并根据最大功率点的变化调整步进电机的位置，一直循环执行，直到找到最佳的最大功率点。