DS1302 芯片驱动程序

DS1302是一款实时时钟芯片，以下是DS1302的驱动程序示例：

#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int

// DS1302的IO口定义
sbit DSIO = P2^0;
sbit SCLK = P2^1;
sbit RST = P2^2;

// DS1302的8个寄存器地址
uchar const ADDR_SEC = 0x80;
uchar const ADDR_MIN = 0x82;
uchar const ADDR_HOUR = 0x84;
uchar const ADDR_DAY = 0x86;
uchar const ADDR_MONTH = 0x88;
uchar const ADDR_WEEK = 0x8A;
uchar const ADDR_YEAR = 0x8C;
uchar const ADDR_CONTROL = 0x8E;

// DS1302的读写命令
uchar const CMD_READ = 0x81;
uchar const CMD_WRITE = 0x80;

// DS1302初始化函数
void DS1302_Init()
{
    RST = 0;
    SCLK = 0;
}

// 向DS1302写入一个字节
void DS1302_WriteByte(uchar dat)
{
    uchar i;
    for (i = 0; i < 8; i++)
    {
        DSIO = dat & 0x01;
        dat >>= 1;
        SCLK = 1;
        SCLK = 0;
    }
}

// 从DS1302读取一个字节
uchar DS1302_ReadByte()
{
    uchar i, dat = 0;
    for (i = 0; i < 8; i++)
    {
        dat >>= 1;
        if (DSIO)
            dat |= 0x80;
        SCLK = 1;
        SCLK = 0;
    }
    return dat;
}

// 向DS1302写入一个字节的数据
void DS1302_Write(uchar addr, uchar dat)
{
    RST = 1;
    DS1302_WriteByte(CMD_WRITE | addr);
    DS1302_WriteByte(dat);
    RST = 0;
}

// 从DS1302读取一个字节的数据
uchar DS1302_Read(uchar addr)
{
    uchar dat;
    RST = 1;
    DS1302_WriteByte(CMD_READ | addr);
    dat = DS1302_ReadByte();
    RST = 0;
    return dat;
}

// 设置DS1302的时间
void DS1302_SetTime(uchar hour, uchar min, uchar sec, uchar day, uchar month, uchar week, uchar year)
{
    DS1302_Write(ADDR_HOUR, hour);
    DS1302_Write(ADDR_MIN, min);
    DS1302_Write(ADDR_SEC, sec);
    DS1302_Write(ADDR_DAY, day);
    DS1302_Write(ADDR_MONTH, month);
    DS1302_Write(ADDR_WEEK, week);
    DS1302_Write(ADDR_YEAR, year);
}

// 获取DS1302的时间
void DS1302_GetTime(uchar* hour, uchar* min, uchar* sec, uchar* day, uchar* month, uchar* week, uchar* year)
{
    *hour = DS1302_Read(ADDR_HOUR);
    *min = DS1302_Read(ADDR_MIN);
    *sec = DS1302_Read(ADDR_SEC);
    *day = DS1302_Read(ADDR_DAY);
    *month = DS1302_Read(ADDR_MONTH);
    *week = DS1302_Read(ADDR_WEEK);
    *year = DS1302_Read(ADDR_YEAR);
}

以上是DS1302的驱动程序示例，可以根据实际情况进行修改。