基于单片机万年历设计代码

以下是基于单片机的万年历设计代码，仅供参考：

#include <reg52.h> // 引入头文件

unsigned char code date_table[12] = {31,28,31,30,31,30,31,31,30,31,30,31}; // 定义每个月份的天数
unsigned char code week_table[7] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07}; // 定义星期的编码

sbit LSA = P2^2; // 定义数码管的引脚
sbit LSB = P2^3;
sbit LSC = P2^4;

sbit SDA = P2^0; // 定义DS1302的引脚
sbit SCK = P2^1;
sbit RST = P2^5;

bit flag;

// DS1302读写函数
void Write_Ds1302(unsigned char temp)
{
    unsigned char i;
    for(i=0;i<8;i++)
    {
        SCK = 0;
        SDA = temp & 0x01;
        temp >>= 1;
        SCK = 1;
    }
}

unsigned char Read_Ds1302()
{
    unsigned char i, temp = 0;
    for(i=0;i<8;i++)
    {
        SCK = 0;
        temp >>= 1;
        if(SDA)
            temp |= 0x80;
        SCK = 1;
    }
    return temp;
}

// DS1302初始化函数
void Init_Ds1302()
{
    RST = 0;
    RST = 1;
    Write_Ds1302(0x8e); // 写入控制字
    Write_Ds1302(0); // 关闭写保护
    RST = 0;
    Write_Ds1302(0x80); // 写入充电保护字
    RST = 1;
}

// DS1302时钟读写函数
void Read_RTC()
{
    unsigned char i;
    Write_Ds1302(0xbf); // 读时钟数据
    for(i=0;i<7;i++)
    {
        flag = i;
        rtc[i] = Read_Ds1302();
    }
}

void Write_RTC()
{
    unsigned char i;
    Write_Ds1302(0xbe); // 写时钟数据
    for(i=0;i<7;i++)
        Write_Ds1302(rtc[i]);
}

// 显示函数
void Display()
{
    unsigned char i;
    for(i=0;i<8;i++)
    {
        switch(i)
        {
            case(0): 
                LSA = 0; LSB = 0; LSC = 0; break;
            case(1):
                LSA = 1; LSB = 0; LSC = 0; break;
            case(2):
                LSA = 0; LSB = 1; LSC = 0; break;
            case(3):
                LSA = 1; LSB = 1; LSC = 0; break;
            case(4):
                LSA = 0; LSB = 0; LSC = 1; break;
            case(5):
                LSA = 1; LSB = 0; LSC = 1; break;
            case(6):
                LSA = 0; LSB = 1; LSC = 1; break;
            case(7):
                LSA = 1; LSB = 1; LSC = 1; break;
        }
        P0 = smgduan[i];
        delay(1);
        P0 = 0x00;
    }
}

// 主函数
void main()
{
    unsigned char i;
    Init_Ds1302();
    while(1)
    {
        Read_RTC();
        rtc[1] |= 0x80;
        Display();
        for(i=0;i<50;i++)
        {
            delay(1);
            if(flag == 2)
            {
                rtc[0]++;
                if(rtc[0] == 60)
                {
                    rtc[0] = 0;
                    rtc[1]++;
                    if(rtc[1] == 0x80)
                    {
                        rtc[1] = 0;
                        rtc[2]++;
                        if(rtc[2] == 24)
                            rtc[2] = 0;
                    }
                }
                Write_RTC();
                flag = 0;
            }
        }
    }
}

以上代码使用了DS1302时钟模块来获取当前时间，并通过数码管显示出来。其中，需要注意的是DS1302的引脚与单片机的连接方式需要根据实际情况进行调整。另外，需要自己定义数码管的编码和延时函数。