rtc.c

TI公司TMS320VC5509的外设驱动程序

/*
 *  Copyright (C) 2001, Spectrum Digital, Inc.  All Rights Reserved.
 */
 
#include "5509.h"
#include "util.h"

#define TIME_SEC         0x00
#define TIME_MIN         0x00
#define TIME_HOUR        0x10
#define TIME_DAYW        0x06  // Day of week (1..7 = Sunday..Saturday)
#define TIME_DAYM        0x01  // Day of month (1-31)
#define TIME_MONTH       0x06
#define TIME_YEAR        0x01

unsigned short int RTC_Test()
{
    PC55XX_RTC pRTC = (PC55XX_RTC)C55XX_RTC_ADDR;

    // Halt clock
    SetMask(pRTC -> rtcinten, RTCINTEN_SET);

    // Set initial time/date
    WriteField(pRTC -> rtcsec, TIME_SEC, RTCSEC_SEC);
    WriteField(pRTC -> rtcmin, TIME_MIN, RTCMIN_MIN);
    WriteField(pRTC -> rtchour, TIME_HOUR, RTCHOUR_HR);
    WriteField(pRTC -> rtcdayw, TIME_DAYW, RTCDAYW_DAY);
    WriteField(pRTC -> rtcdaym, TIME_DAYM, RTCDAYM_DATE);
    WriteField(pRTC -> rtcmonth, TIME_MONTH, RTCMONTH_MONTH);
    
    // Put in 24 hour mode
    ClearMask(pRTC -> rtchour, RTCHOUR_AMPM);

    // Start clock running
    ClearMask(pRTC -> rtcinten, RTCINTEN_SET);
    
    // Wait for a while and check if the clock is running
    SWDelayMsec(4000);

    if (ReadField(pRTC -> rtcsec, RTCSEC_SEC) == TIME_SEC)
         return ERR_RTC_FAIL;
         
    return 0;
}