ds1302.c

DS1302显示时钟

#include <DS1302.h>
#include <intrins.h>


/********************************************************************
*
* 名称: OscEnable
* 说明:
* 功能: 时钟停止位使能
* call: v_W1302
* in:   no
* return:no
*********************************************************************/
void OscEnable()
{
     WriDs(0x80,0);
}

/********************************************************************
*
* name: Osc24
* state:
* fun:  use 24 hour record
* call: v_W1302
* in:   no
* return:no
*********************************************************************/
void Osc24()
{
     WriDs(0x84,0);
}

/********************************************************************
*
* 名称: ChargeEnable
* state:
* fun : 涓流充电使能
* 调用: v_W1302
* in:  no
* 返回值: 无
*********************************************************************/
void ChargeEnable()
{
     WriDs(0x90,0xa5); /*涓流充电,一个二极管,一个2k的电阻*/
}

/********************************************************************
*
* 名称:   DsInit()
* 说明:
* fun :   时钟芯片初始化
* call:   No
* in:     no
* return: no
*********************************************************************/
void DsInit()
{
     //T_CLK = 0;
     //T_RST = 0;
     //_nop_();
     //T_RST = 1;
     DSCLKLOW();
     DSRSTLOW();
     DSRSTHIGH();
     OscEnable();      /* 时钟停止位使能      */
     WriDs(0x8e,0x0);  /* 允许写入单个数据字节 */
     ChargeEnable();   /* 充电使能            */
     Osc24();
}

/**************************************************
*原型：void WriteDS(uchar addr, uchar dat)
*功能：向ds1302时钟芯片写入数据
*说明：无
*参数：dat 写入数据;addr 写入地址
*返回：无
**************************************************/
void WriDs(uchar addr, uchar dat)
{
    //uchar dsWriDsI;
    //uchar dsWriCh = 0x01;
    dsWriDsI = 0;
    dsWriCh  = 0x01;
    EA = 0;
    DSCLKLOW();
    DSRSTLOW();
    DSRSTHIGH();
    for(dsWriDsI = 0;  dsWriDsI < 8; dsWriDsI ++)
      {
            if(addr & dsWriCh)
            {
                DSDIO = 1;
            }
            else
            {
               DSDIO = 0;
            }
            dsWriCh = dsWriCh << 1;
            DSCLKHIGH();
            DSCLKLOW();
      }
      dsWriCh = 0x01;
      for(dsWriDsI = 0; dsWriDsI < 8; dsWriDsI ++)
      {
            if(dat & dsWriCh)
            {
                DSDIO = 1;
            }
            else
            {
                DSDIO = 0;
            }
            dsWriCh = dsWriCh << 1;
            DSCLKHIGH();
            DSCLKLOW();
      }
    DSRSTLOW();
    EA = 1;
}

/**************************************************
*原型：uchar ReadDS(uchar addr)
*功能：读取ds时钟内容
*说明：无
*参数：内部寄存器地址
*返回：寄存器内容
**************************************************/
uchar ReadDs(uchar addr)
{
    //uchar dsReadDsK;
    //uchar dsReadCl;
    dsReadDsK = 0;
    dsReadCl  = 0;

    DSRSTLOW();
    DSCLKLOW();
    DSRSTHIGH();
    dsReadCl = 0x01;
    for(dsReadDsK = 0; dsReadDsK < 8; dsReadDsK ++)
      {
          if(addr & dsReadCl)
          {
              DSDIO = 1;
          }
          else
          {
              DSDIO = 0;
          }
          dsReadCl = dsReadCl << 1;
          DSCLKHIGH();
          DSCLKLOW();
      }
    dsReadCl = 0;
    for(dsReadDsK = 0; dsReadDsK < 8; dsReadDsK ++)
      {
          dsReadCl = dsReadCl >> 1;
          if(DSDIO)
          {
              dsReadCl = dsReadCl + 0x80;
          }
          DSCLKHIGH();
          DSCLKLOW();
      }
    DSRSTLOW();
    return(dsReadCl);
}

void SetTimer(uchar *pSetTimer)
{
    WriDs(YEAR_WRI, *(pSetTimer + 0));
    WriDs(MON_WRI , *(pSetTimer + 1));
    WriDs(DATE_WRI, *(pSetTimer + 2));
    WriDs(HR_WRI  , *(pSetTimer + 3));
    WriDs(MIN_WRI , *(pSetTimer + 4));
    WriDs(SEC_WRI , *(pSetTimer + 5));
}

void GetTimer(uchar *pGetTimer)
{
    *(pGetTimer + 0) = ReadDs(YEAR_READ);
    *(pGetTimer + 1) = ReadDs(MON_READ);
    *(pGetTimer + 2) = ReadDs(DATE_READ);
    *(pGetTimer + 3) = ReadDs(HR_READ);
    *(pGetTimer + 4) = ReadDs(MIN_READ);
    *(pGetTimer + 5) = ReadDs(SEC_READ);
}