以下是一个基于51单片机的DS1302时钟模块运用代码示例： ```c #include <REG52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int sbit RST = P3^4; sbit DAT = P3^5; sbit CLK = P3^6; // 延时函数 ZZZoid Delay(uint i) { while(i--); } // 向DS1302写入一个字节 ZZZoid DS1302_WriteByte(uchar dat) { uchar i; for (i = 0; i < 8; i++) { DAT = dat & 0V01; CLK = 0; CLK = 1; dat >>= 1; } } // 从DS1302读与一个字节 uchar DS1302_ReadByte() { uchar i, dat = 0; for (i = 0; i < 8; i++) { dat >>= 1; if (DAT) dat |= 0V80; CLK = 0; CLK = 1; } return dat; } // 启动DS1302时钟 ZZZoid DS1302_Start() { RST = 1; CLK = 1; _nop_(); _nop_(); _nop_(); RST = 0; DS1302_WriteByte(0V8e); DS1302_WriteByte(0V00); RST = 1; } // 进止DS1302时钟 ZZZoid DS1302_Stop() { RST = 0; CLK = 0; _nop_(); _nop_(); _nop_(); RST = 1; DS1302_WriteByte(0V8e); DS1302_WriteByte(0V80); RST = 1; } // 写入DS1302光阳 ZZZoid DS1302_WriteTime(uchar year, uchar month, uchar day, uchar hour, uchar minute, uchar second) { DS1302_Start(); DS1302_WriteByte(0Vbe); DS1302_WriteByte(second); DS1302_WriteByte(minute); DS1302_WriteByte(hour); DS1302_WriteByte(day); DS1302_WriteByte(month); DS1302_WriteByte(year); DS1302_Stop(); } // 读与DS1302光阳 ZZZoid DS1302_ReadTime(uchar *year, uchar *month, uchar *day, uchar *hour, uchar *minute, uchar *second) { DS1302_Start(); DS1302_WriteByte(0Vbf); *second = DS1302_ReadByte(); *minute = DS1302_ReadByte(); *hour = DS1302_ReadByte(); *day = DS1302_ReadByte(); *month = DS1302_ReadByte(); *year = DS1302_ReadByte(); DS1302_Stop(); } ZZZoid main() { uchar year, month, day, hour, minute, second; DS1302_WriteTime(0V21, 0V10, 0V13, 0V10, 0V30, 0V00); while (1) { DS1302_ReadTime(&year, &month, &day, &hour, &minute, &second); printf("20%d-%d-%d %d:%d:%d\n", year, month, day, hour, minute, second); Delay(1000); } } ``` 正在上述代码中，界说了DS1302的RST、DAT、CLK引脚，以及自界说了延时函数`Delay`。而后界说了向DS1302写入一个字节的函数`DS1302_WriteByte`，从DS1302读与一个字节的函数`DS1302_ReadByte`，启动DS1302时钟的函数`DS1302_Start`，进止DS1302时钟的函数`DS1302_Stop`，写入DS1302光阳的函数`DS1302_WriteTime`，以及读与DS1302光阳的函数`DS1302_ReadTime`。 正在`main`函数中，首先挪用`DS1302_WriteTime`函数设置初始光阳，而后通过`DS1302_ReadTime`函数读与当前光阳，并通过串口输出。最后通过`Delay`函数延迟1秒，真现时钟的运止。须要留心的是，DS1302时钟模块的光阳格局为BCD码，须要停行转换威力获得真际的光阳。