ds12c887.c

887时间模块单片机驱动程序,屏蔽部分为时间修正程序.

#include <ABSACC.h>
#include <c8051f020.h>
//#define  uchar unsigned char 

#define AD        P2
//#define A_ds        0x0A
//#define B_ds         0x0B
#define CENTURY   0x32
#define YEAR      0x09
#define MONTH     0x08
#define DAY       0x07
#define WEEK      0x06
#define HOUR      0x04
#define MINUTE    0x02
#define SECOND    0x00

#define   IRQ   P1_7
#define   RESET P1_6
#define   DS    P1_5
#define   R_W   P1_4
#define   AS    P1_3
#define   CS    P1_2

unsigned char h;
unsigned char SE;
unsigned char MI;
unsigned char HO;
unsigned char DA;
unsigned char MO;
unsigned char YE;

   
  
 //READ_CMD_TIME(unsigned char y); /*y是想要读的地址，h为读出的数据*/
//void WRITE_CMD_TIME(unsigned char x,unsigned char z); /*x为地址，Z为写入的命令*/
//void GET_TIME887(void)
//void delay (unsigned int i);
 
 
/********************************************************************/
 
 void delay (unsigned int i)
{
	unsigned int j,k;
	for(k=1;k<i;k++)
	{
		for(j=1;j<i;j++);
	}
}
/*******************************************************************/
/*向不同的地址读不同的时间数据*/
/********************************************************************/
 READ_CMD_TIME (unsigned char y) /*y是想要读的地址，h为读出的数据*/
  
  {   
        DS=1;
	    AS=1;
	   delay(10); 
	   CS =0;
	  // delay(100);
       
	   AD=y;
	   delay(10);            
	   AS=0;
	   delay(10);
	   AD=0xff;               //绝对需要注意的地方51单片机复用时，读完数据后须将IO口复1才能写
	   DS=0;
	   delay(50);
	  
		//delay(100);
	   	h=AD;
		delay(10);
		DS=1;
	//	h=AD;
	    AS=1;
       // CS=1;
		return h;
  }
/********************************************************************/
/***************设置12887时钟寄存器***********************************/
/*********************************************************************/ 
 void WRITE_CMD_TIME(unsigned char x,unsigned char z) /*x为地址，Z为写入的命令*/
     {
       DS=1;
       AS=1;
       R_W=1;
  
  
      delay(10);
       CS=0;
      delay(10);              /*开始状态*/
   
      AD=x;
     delay(10);
      AS=0;
      delay(10);

      R_W=0;
      delay(50);
      AD=z;
      delay(10);
      R_W=1;
      AS=1;
      DS=1;
  
  }
/*********************************************************************/
  void GET_TIME887(void)

  {
   
  SE  =READ_CMD_TIME(SECOND);
  MI  =READ_CMD_TIME(MINUTE);
  HO  =READ_CMD_TIME(HOUR);
  DA  =READ_CMD_TIME(DAY);
  MO  =READ_CMD_TIME(MONTH);
  YE  =READ_CMD_TIME(YEAR);
  
   }

/********************************************************************/
/****************将不同的时间复给变量，在系统程序中调用变量值就可以**/
/********************************************************************/

   void main(void)
  {
   // P1MDIN=0xff;
    //delay(99);
  	WDTCN = 0x07;	// Watchdog Timer Control Register
    WDTCN = 0xDE;   // Disable WDT
	WDTCN = 0xAD;	// Disable WDT
 
    RESET=0;
    delay(100);
  
    RESET=1;

  //P74OUT = 0xFF;
    XBR2=0x4f;
  //XBR1=0xFF;
  //XBR0=0xFF;
  
    WRITE_CMD_TIME(0x0B,0x82);  //芯片更新禁止
    WRITE_CMD_TIME(0x0A,0xA0);
    WRITE_CMD_TIME(0x0A,0x20);
    WRITE_CMD_TIME(0x0B,0x02);    //芯片更新恢复

 //h=READ_CMD_TIME(0x0A); 
     //此处有错误

   while(1)
 { 
	 READ_CMD_TIME(0x0A);
 
	 if((h&0x80)!=1)  
	  {
	  SE  =READ_CMD_TIME(SECOND);
      MI  =READ_CMD_TIME(MINUTE);
      HO  =READ_CMD_TIME(HOUR);
      DA  =READ_CMD_TIME(DAY);
      MO  =READ_CMD_TIME(MONTH);
      YE  =READ_CMD_TIME(YEAR);
		 
	 delay(100);
	  }
  }
  }


//需要注意的是在读完地址后将相应的IO口置1才能写进数据//此函数最后输出的是
// SE  MI  HO  DA  MO  YE几个变量值负给显示