/* 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 sbit SCK=P1^7; sbit SDA=P2^3; sbit RST = P1^3; // DS1302复位 void Write_Ds1302_Byte(unsigned char temp) { unsigned char i; for (i=0;i>=1; SCK=1; } } void Write_Ds1302( unsigned char address,unsigned char dat ) { RST=0; _nop_(); SCK=0; _nop_(); RST=1; _nop_(); Write_Ds1302_Byte(address); Write_Ds1302_Byte(dat); RST=0; } unsigned char Read_Ds1302 ( unsigned char address ) { unsigned char i,temp=0x00; RST=0; _nop_(); SCK=0; _nop_(); RST=1; _nop_(); Write_Ds1302_Byte(address); for (i=0;i>=1; if(SDA) temp|=0x80; SCK=1; } RST=0; _nop_(); RST=0; SCK=0; _nop_(); SCK=1; _nop_(); SDA=0; _nop_(); SDA=1; _nop_(); return (temp); } void delay(int n)/*延时函数*/ { char z=110; while(n--) for(z=0;z<110;z++); }