/home/daqweb/fgddaq/c8051/Protocols/SmaRTC.c File Reference

#include <c8051F410.h>
#include "stdio.h"
#include "SmaRTC.h"

Functions
void	SmaRTCInit (void)
void	SmaRTCSetTime (unsigned long int mytime)
unsigned long int	SmaRTCRead (void)
void	rtc_WriteTimeReg (uchar addr)
void	rtc_ReadTimeReg (uchar addr)
Variables
uchar data	rtc_myTime [RTC_TimeSize]

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Function Documentation

void rtc_ReadTimeReg

(

uchar

addr

)

                                   {
uchar idx;

  RTC_WAIT(); // set the first address with auto-read
  RTC0ADR = addr | RTC_BUSY | RTC_AUTORD | RTC_SHORT;
  for ( idx = 0; idx < RTC_TimeSize; idx++ ) {
  RTC_WAIT();
  rtc_myTime[ idx ] = RTC0DAT;
  }
}

void rtc_WriteTimeReg

(

uchar

addr

)

                                    {
  uchar idx;

  RTC_WAIT_WRITE( addr, rtc_myTime[ 0 ] );
  for ( idx = 1; idx < RTC_TimeSize; idx++ ) {
  RTC_WAIT();
  RTC0DAT = rtc_myTime[ idx ];
  }
}

void SmaRTCInit

(

void

)

                      {
  RTC0KEY = 0xA5; // Unlock the smaRTClock interface
  RTC0KEY = 0xF1;
// start RTC crystal OSC
  RTC_WRITE( RTC0XCN, 0x40 ); // auto-gain, Xtal
  RTC_WAIT_WRITE( RTC0CN, 0x80 ); // enable the smaRTClock
  RTC_WAIT();
  do { // wait for stabilized
    RTC_READ( RTC0XCN );
    RTC_WAIT();
  } while ( !(RTC0DAT & 0x10) ); // check CLKVLD
}

unsigned long int SmaRTCRead

(

void

)

                                   {
  unsigned long int ltime;
  int i;
// read RTC time
  RTC_WAIT_WRITE( RTC0CN, 0x91 ) // enable, capture
  RTC_WAIT(); // wait for set time complete
  do {
    RTC_READ( RTC0CN );
    RTC_WAIT();
  } while ( RTC0DAT & 0x01 ); // check RTC0CAP
  rtc_ReadTimeReg( CAPTURE0 ); // read out CAPTURE register
  ltime = 0;
  for (i=2;i<6;i++) {
   ltime |= ((unsigned long int) rtc_myTime[i]) << (8*(i-2));
  }
  return ltime;
}

void SmaRTCSetTime

(

unsigned long int

mytime

)

                                             {
  int i;

  for (i=2;i<6;i++) {
    rtc_myTime[i] = (uchar) (mytime >> (8*(i-2)) & 0xFF);    
  }
// set RTC time
  rtc_WriteTimeReg( CAPTURE0 ); // set CAPTRUE register
  RTC_WAIT_WRITE( RTC0CN, 0x82 ) // enable, set time
  RTC_WAIT(); // wait for set time complete
  do {
    RTC_READ( RTC0CN );
    RTC_WAIT();
  } while ( RTC0DAT & 0x02 ); // check RTC0SET
  RTC_WRITE( RTC0CN, 0x90 ); // run RTC
}

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Variable Documentation

uchar data rtc_myTime[RTC_TimeSize]

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