rtc.c

关于三星公司44b0arm单片机的RTC测试程序,大家可以学习一下.

#include "..\Target\44b.h"
#include "..\Target\44blib.h"
#include "rtc.h"

void __irq Rtc_Tick(void);
char *date[8] = {"","SUN","MON","TUE","WED","THU","FRI","SAT"};
volatile unsigned int sec_tick;


void Display_Rtc(void)
{
    int year;
    int month,day,weekday,hour,min,sec;

    rRTCCON = 0x01;    // R/W enable, 1/32768, Normal(merge), No reset
//    Uart_Printf("This test should be excuted once RTC test(Alarm) for RTC initialization\n");
    while(1)    //避免读入期间时间跳变引起时间错误
    {
	if(rBCDYEAR == 0x99) 
	    year = 0x1999;
	else 
	    year = 0x2000 + rBCDYEAR;
	    month=rBCDMON;
	    day=rBCDDAY;
	    weekday=rBCDDATE;
	    hour=rBCDHOUR;
	    min=rBCDMIN;
	    sec=rBCDSEC;
	if(sec!=0)
	    break;
    }	 
    Uart_Printf("%4x,%2x,%2x,%s,%2x:%2x:%2x\n",year,month,day,date[weekday],hour,min,sec);
    rRTCCON = 0x0;    // R/W disable(for power consumption), 1/32768, Normal(merge), No reset
}


volatile int isRtcInt;

void __irq Rtc_Int(void)
{
    rI_ISPC=BIT_RTC;   
    
    Beep(0x01);
    Uart_Printf("RTC Alarm Interrupt O.K.\n\n");
    Beep(0x00);
    isRtcInt=1;  
}


int Test_Rtc_Alarm(void)  
{
    Uart_Printf("[RTC Alarm Test for S3C44B0X]\n");
    Uart_Printf("Now Initliaze time to 1999-12-31-23-59-30,\n");
    Uart_Printf("Please wait 30 seconds for the Alarm interrupt......\n");
    Rtc_Init();

    //下面设置报警时间
    rALMYEAR=TESTYEAR2 ;
    rALMMON =TESTMONTH2;
    rALMDAY =TESTDAY2  ;
    rALMHOUR=TESTHOUR2 ;
    rALMMIN =TESTMIN2  ;
    rALMSEC =TESTSEC2; 

    isRtcInt=0;
    pISR_RTC=(unsigned int)Rtc_Int;
    rRTCALM=0x7f;
    rRTCCON=0x0;
    
    rINTCON=0x5;	      //Non-vectored,IRQ enable,FIQ disable //
	rINTMOD=0x0;	      //All=IRQ mode//
    rINTMSK=~(BIT_GLOBAL|BIT_RTC);

    while(isRtcInt==0);
    
    rINTMSK=BIT_GLOBAL;
    rRTCCON = 0x0;    // R/W disable(for power consumption), 1/32768, Normal(merge), No reset
    
    return 1;
}


void Rtc_Init(void)
{
    rRTCCON = 0x01;	// R/W enable, 1/32768, Normal(merge), No reset

    rBCDYEAR = TESTYEAR;
    rBCDMON  = TESTMONTH;
    rBCDDAY  = TESTDAY;	// SUN:1 MON:2 TUE:3 WED:4 THU:5 FRI:6 SAT:7
    rBCDDATE = TESTDATE;
    rBCDHOUR = TESTHOUR;
    rBCDMIN  = TESTMIN;
    rBCDSEC  = TESTSEC;
}


void Test_Rtc_Tick(void)
{
    Uart_Printf("[RTC Tick interrupt test for S3C44B0X]\n");
    Uart_Printf("Typing any key to exit!!!\n");	 
    pISR_TICK=(unsigned)Rtc_Tick;


    sec_tick=1;
    rINTMSK=~(BIT_GLOBAL|BIT_TICK); 
    rRTCCON=0x0;		//R/W disable(for power consumption), 1/32768, Normal(merge), No reset
    rTICINT = 127+(1<<7);	//START

    Uart_Getch();
    rINTMSK |= (BIT_GLOBAL | BIT_TICK);

    rRTCCON=0x0;	//END
}


void __irq Rtc_Tick(void)
{
    rI_ISPC=BIT_TICK;   
    Uart_Printf("\b\b\b\b\b\b\b%03d sec",sec_tick++);
}