DS1302作为时钟芯片，感觉是省赛的基础元件的使用的最后一个了，感觉可能比较复杂，但是其实也没多复杂，这里的代码是参考我朋友的，也没来得及仔细研究。这里就全当给大家参考了。
其实我倒是遇见过，这个读出来全是165的，原因是因为板子的芯片没插牢，所以导致了这种现象。
/* 程序说明: DS1302驱动程序 软件环境: Keil uVision 4.10 硬件环境: CT107单片机综合实训平台 8051，12MHz 日 期: 2011-8-9 */ #include <STC15F2K60S2.H> #include <intrins.h> #include "ds1302.h" void Write_Ds1302(unsigned char temp) { unsigned char i; for (i = 0; i < 8; i++) { SCK = 0; SDA_DS = temp & 0x01; temp >>= 1; SCK = 1; } } void Write_Ds1302_Byte(unsigned char address, unsigned char dat) { RST = 0; _nop_(); SCK = 0; _nop_(); RST = 1; _nop_(); Write_Ds1302(address); Write_Ds1302(dat); RST = 0; } unsigned char Read_Ds1302_Byte(unsigned char address) { unsigned char i, temp = 0x00; RST = 0; _nop_(); SCK = 0; _nop_(); RST = 1; _nop_(); Write_Ds1302(address); for (i = 0; i < 8; i++) { SCK = 0; temp >>= 1; if (SDA_DS) temp |= 0x80; SCK = 1; } RST = 0; _nop_(); SCK = 0; _nop_(); SCK = 1; _nop_(); SDA_DS = 0; _nop_(); SDA_DS = 1; _nop_(); return (temp); } void setsfm(unsigned char shi, unsigned char fen, unsigned char miao, unsigned char ri, unsigned char yue, unsigned char zhou, unsigned char nian) { Write_Ds1302_Byte(0x8e, 0); Write_Ds1302_Byte(0x80, miao / 10 * 16 + miao % 10); Write_Ds1302_Byte(0x82, fen / 10 * 16 + fen % 10); Write_Ds1302_Byte(0x84, shi / 10 * 16 + shi % 10); Write_Ds1302_Byte(0x86, ri / 10 * 16 + ri % 10); Write_Ds1302_Byte(0x88, yue / 10 * 16 + yue % 10); Write_Ds1302_Byte(0x8a, zhou / 10 * 16 + zhou % 10); Write_Ds1302_Byte(0x8c, nian / 10 * 16 + nian % 10); Write_Ds1302_Byte(0x8e, 0x80); } unsigned char getshi() { unsigned char a = Read_Ds1302_Byte(0x85); return a / 16 * 10 + a % 16; } unsigned char getfen() { unsigned char a = Read_Ds1302_Byte(0x83); return a / 16 * 10 + a % 16; } unsigned char getmiao() { unsigned char a = Read_Ds1302_Byte(0x81); return a / 16 * 10 + a % 16; } unsigned char getri() { unsigned char a = Read_Ds1302_Byte(0x87); return a / 16 * 10 + a % 16; } unsigned char getyue() { unsigned char a = Read_Ds1302_Byte(0x89); return a / 16 * 10 + a % 16; } unsigned char getzhou() { unsigned char a = Read_Ds1302_Byte(0x8B); return a / 16 * 10 + a % 16; } unsigned char getnian() { unsigned char a = Read_Ds1302_Byte(0x8D); return a / 16 * 10 + a % 16; }