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问 最近用到 DS12887，根据资料编了自己的程序，也用了一些网上公布的程序，可惜老是出错： DS12887不走，或者秒钟有100，但是分钟不变，或者初始值送不进 DS12887，请各位指点 DS12887的使用方法。
我只需读时间就行了，不需要里面的任何中断。谢谢！ 答 1: Selectable between Motorola and Intel busSelectable between Motorola and Intel bus
timing
PIN 1 选择 答 2: 12887以下的程序就是读时间和led显示
#include
#include
#include
#define uchar unsigned char
#define uint unsigned int
#define DS128870 XBYTE[0x2000]
#define DS128871 XBYTE[0x2001]
#define DS128872 XBYTE[0x2002]
#define DS128873 XBYTE[0x2003]
#define DS128874 XBYTE[0x2004]
#define DS128875 XBYTE[0x2005]
#define DS128876 XBYTE[0x2006]
#define DS128877 XBYTE[0x2007]
#define DS128878 XBYTE[0x2008]
#define DS128879 XBYTE[0x2009]
#define DS12887A XBYTE[0x200a]
#define DS12887B XBYTE[0x200b]
#define DS12887C XBYTE[0x200c]
#define DS12887D XBYTE[0x200d]
#define RAM1 XBYTE[0x0050]
#define RAM2 XBYTE[0x0051]

/**********显示设置******************/
unsigned char checksum,count3;
bit read_flag=0;
sbit DISP_CLK=P1^0; //the CLK of the LED display
sbit DISP_DO=P1^1;
uchar rcv_buffer[16],event;
uchar error,int_timers,code disp_table[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uint count;
/*******************************************************************/
void send_byte(uchar x) //跟12887无关
{
uchar i;
for(i=0;i<8;i++)
{
DISP_CLK=0;
DISP_DO=(bit)(x&0x80);
x=x<<1;
DISP_CLK=1;
}
}
/* Ds12887³õʼ»¯ */
/*******************************************************************/

void initstat (void) /*12887³õʼ»¯*/
{
DS12887B=0x16;//Í£Ö¹¸üУ¬Ñ¡BCDÂ룬24СʱÖÆ
DS12887A=0xa0;//´ò¿ª¾§Õñ²¢ÔÊÐíRTC¼Æʱ
}

void w DS12887(void)
{
int i;
DS12887B=0x96;
DS128870=30; //秒
DS128872=21; //分
DS128874=8; //时
DS128871=0xff; DS128873=0xff; DS128875=0xff;
DS128877=0x15; DS128878=0x02; DS128879=0x4;
DS12887B=0x16;//ÿÃë¼Æʱ×ßÒ»´Î£¬24СʱÖÆ
}

/***************Ò»¸ö10msÑÓʱ³ÌÐò************************/
void delay10ms(unsigned char time) //跟12887无关
{
unsigned char i;
unsigned int j;
for (i=0;i{
for(j=0;j<0x10;j++)
{

}
}
}


void disp_led(uchar buffer,uchar control) //跟12887无关
{
uchar i,temp[6];
uint tempcount;
switch(control)
{
case 0:
{
for(i=0;i<11;i++)
send_byte(disp_table[buffer%10]);
break;
}
case 1:
{
tempcount=count;
for(i=0;i<6;i++)
{
temp[i]=tempcount%10;
tempcount/=10;
}
send_byte(disp_table[buffer/10]);
send_byte(disp_table[buffer%10]);
send_byte(0x00);
send_byte(disp_table[0]);
send_byte(disp_table[0]);
for(i=0;i<6;i++)
send_byte(disp_table[temp[5-i]]);
break;
}
}
DISP_DO=1;
}
main()
{
unsigned i;
disp_led(0,0);
for(i=0;i<10;i++)
delay10ms(1000);
initstat();
//w DS12887();
//RAM1=5;
// RAM2=4;
while(1)
{
//delay10ms(500);
if( DS128870!=count)
{
delay10ms(2);
send_byte(disp_table[RAM1/10]);
send_byte(disp_table[RAM1%10]);
send_byte(0);
send_byte(disp_table[ DS128874/10]);
send_byte(disp_table[ DS128874%10]);
send_byte(0x40);
send_byte(disp_table[ DS128872/10]);
send_byte(disp_table[ DS128872%10]);
send_byte(0x40);
send_byte(disp_table[ DS128870/10]);
send_byte(disp_table[ DS128870%10]);
delay10ms(1);
}
count= DS128870;


}
}
答 3: 上面的太反了，把一些没用的去掉上面的太反了，把一些没用的去掉
#include
#include
#include
#define uchar unsigned char
#define uint unsigned int
#define DS128870 XBYTE[0x2000]
#define DS128871 XBYTE[0x2001]
#define DS128872 XBYTE[0x2002]
#define DS128873 XBYTE[0x2003]
#define DS128874 XBYTE[0x2004]
#define DS128875 XBYTE[0x2005]
#define DS128876 XBYTE[0x2006]
#define DS128877 XBYTE[0x2007]
#define DS128878 XBYTE[0x2008]
#define DS128879 XBYTE[0x2009]
#define DS12887A XBYTE[0x200a]
#define DS12887B XBYTE[0x200b]
#define DS12887C XBYTE[0x200c]
#define DS12887D XBYTE[0x200d]
#define RAM1 XBYTE[0x0050]
#define RAM2 XBYTE[0x0051]



void initstat (void) //初始12887
{
DS12887B=0x16;
DS12887A=0xa0;
}

void w DS12887(void) //设置12887时间
{
int i;
DS12887B=0x96;
DS128870=30;
DS128872=21;
DS128874=8;
DS128871=0xff; DS128873=0xff; DS128875=0xff;
DS128877=0x15; DS128878=0x02; DS128879=0x4;
DS12887B=0x16;
}

/***************延时************************/
void delay10ms(unsigned char time)
{
unsigned char i;
unsigned int j;
for (i=0;i{
for(j=0;j<0x10;j++)
{

}
}
}


main()
{
initstat();
//w DS12887();
//RAM1=5;
// RAM2=4;
while(1) //下面是显示出时间的程序
{
delay10ms(500);
if( DS128870!=count)
{
delay10ms(2);
send_byte(disp_table[RAM1/10]);
send_byte(disp_table[RAM1%10]);
send_byte(0);
send_byte(disp_table[ DS128874/10]);//直接显示12887时间
send_byte(disp_table[ DS128874%10]);
send_byte(0x40);
send_byte(disp_table[ DS128872/10]);
send_byte(disp_table[ DS128872%10]);
send_byte(0x40);
send_byte(disp_table[ DS128870/10]);
send_byte(disp_table[ DS128870%10]);
delay10ms(1);
}
count= DS128870;


}
}
答 4: 你要确定好时序呀首先你要确定总线，硬件连接来选择
网上有经典程序，你最好看一下，直接就能用