建议用“连续读取”的模式，这样比单个数据读取省时间。
#ifndef _DS1302_H_
#define _DS1302_H_
#include "const.h"
#include "chiptypedef.h"
/**********************************************
仅实现多字节读取模式，单字节和RAM的没有实现
仅实现24小时制模式，12小时制没实现
***********************************************/
//更改为合适的位
#define RST_PIN P3_2
#define SCLK_PIN P3_3
#define IO_PIN P3_4
typedef struct tagBCDDATETIME //注意：字节顺序必须和burst的传输顺序一致
{
BYTE nSecond;
BYTE nMinute;
BYTE nHour;
BYTE nDay;
BYTE nMonth;
BYTE nDayOfWeek;
BYTE nYear;
BYTE WriteProtect; // Before ANY write operation to the clock or RAM, bit 7 must be 0
}BCDDATETIME;
void InitDS1302();
void SetDateTime(const BCDDATETIME* pBCDDateTime);
void GetDateTime(BCDDATETIME* pBCDDateTime);
///////////////////////////////////////
//
typedef enum tagCOMMANDBYTE
{
SECOND_WRITE = 0x80,
SECOND_READ,
MINUTE_WRITE,
MINUTE_READ,
HOUR_WRITE,
HOUR_READ,
DATE_WRITE,
DATE_READ,
MONTH_WRITE,
MONTH_READ,
DAY_WRITE,
DAY_READ,
YEAR_WRITE,
YEAR_READ,
CONTROL = 0x8e, //控制寄存器
TRICKLE_CHARGE = 0x90, //涓流充电设置
CLOCK_BURST_WRITE = 0xbe, //burst模式传输字节
CLOCK_BURST_READ = 0xbf,
RAM_BURST_WRITE = 0xfe, //burst模式读写ram
RAM_BURST_READ = 0xff,
}COMMANDBYTE;
static void WriteSingleCmdByte(COMMANDBYTE cmd, BYTE Data);
static BYTE ReadSingleCmdByte(COMMANDBYTE cmd);
static void WriteOneByte(BYTE byte);
static BYTE ReadOneByte();
#endif
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