rtccwritealrmtimedate.c

来自「基於 c51/8051 的 nand Flash Memory HY27US08」· C语言 代码 · 共 72 行

#if defined(__PIC24F__)
#include <p24Fxxxx.h>
#endif
#include "Rtcc.h"



#ifdef _TMR_RTCC_V1

/*********************************************************************
 * Function:        void RtccWriteAlrmTimeDate(const rtccTimeDate* pTD)
 *
 * PreCondition:    rtccTimeDate structure fields have to have proper values:
 *                      - sec:  BCD codification, 00-59 
 *                      - min:  BCD codification, 00-59
 *                      - hour: BCD codification, 00-24
 *                      - wday: BCD codification, 00-06 
 *                      - mday: BCD codification, 01-31
 *                      - mon: BCD codification, 01-12
 * Input:           pTD - pointer to a constant rtccTimeDate union
 * Output:          TRUE '1' : If all the values are within range
 *                  FALSE '0' : If any value is out of above mentioned range.
 * Side Effects:    None
 * Overview:        The function sets the current alarm time and date in the RTCC device.
 * Note:            - Note that the alarm time does not contain a year field.
 ********************************************************************/
BOOL RtccWriteAlrmTimeDate(const rtccTimeDate* pTD)
{
    BOOL    wasWrEn;
    BOOL    wasAlrm;

   if((MAX_MIN < pTD->b[7]) || (MAX_SEC < pTD->b[6]) || (MAX_WDAY < pTD->b[5]) || (MAX_HOUR < pTD->b[4]) || 
      (MAX_MON < pTD->b[3]) || (MIN_MON > pTD->b[3]) || (MAX_MDAY < pTD->b[2]) || (MIN_MDAY > pTD->b[2]) )
   {
       return FALSE;
   }

   if(!(wasWrEn=mRtccIsWrEn()))
   {
       RtccWrOn();            // have to allow the WRTEN in order to write the new value
   }
   if(wasAlrm=mRtccIsAlrmEnabled())
   {
       mRtccAlrmDisable();     // avoid spurious alarm interrupts
   }


   mRtccClearAlrmPtr();
   mRtccSetAlrmPtr(RTCCPTR_MASK_DAYMON);

//   ALRMVAL=pTD->w[0];  // dummy write /* not required since alarm pointer is set to '0b10' */
   ALRMVAL=pTD->w[1];
   ALRMVAL=pTD->w[2];
   ALRMVAL=pTD->w[3];

   if(wasAlrm)
   {
       mRtccAlrmEnable();
   }
   if(!wasWrEn)
   {
       mRtccWrOff();
   }

   return(TRUE);
}


#else
#warning "Does not build on this target"
#endif