main.c

SUMSUNG S3C44B0X ARM7的一个RTC实时时钟的显示和修改的例程

           else if(month<10&day<10&hour<10&min>10&sec>10)
	    Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,0%1x,%s,0%1x:%2x:%2x",year,month,day,date[weekday],hour,min,sec);	
           else if(month<10&day<10&hour>10&min<10&sec>10)
	    Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,0%1x,%s,%2x:0%1x:%2x",year,month,day,date[weekday],hour,min,sec);
           else if(month<10&day<10&hour>10&min>10&sec<10)
	    Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,0%1x,%s,%2x:%2x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month<10&day>10&hour<10&min<10&sec>10)
	    Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,%2x,%s,0%1x:0%1x:%2x",year,month,day,date[weekday],hour,min,sec);           
           else if(month<10&day>10&hour<10&min>10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,%2x,%s,0%1x:%2x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month<10&day>10&hour>10&min<10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,%2x,%s,%2x:0%1x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month>10&day<10&hour<10&min<10&sec>10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,%2x,0%1x,%s,0%1x:0%1x:%2x",year,month,day,date[weekday],hour,min,sec);
           else if(month>10&day<10&hour<10&min>10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,%2x,0%1x,%s,0%1x:%2x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month>10&day<10&hour>10&min<10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,%2x,0%1x,%s,%2x:0%1x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month>10&day>10&hour<10&min<10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,%2x,%2x,%s,0%1x:0%1x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month<10&day<10&hour<10&min<10&sec>10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,0%1x,%s,0%1x:0%1x:%2x",year,month,day,date[weekday],hour,min,sec);
           else if(month<10&day<10&hour<10&min>10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,0%1x,%s,0%1x:%2x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else if(month>10&day<10&hour<10&min<10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,%2x,0%1x,%s,0%1x:0%1x:0%1x",year,month,day,date[weekday],hour,min,sec); 
           else if(month<10&day<10&hour<10&min<10&sec<10)
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,0%1x,0%1x,%s,0%1x:0%1x:0%1x",year,month,day,date[weekday],hour,min,sec);
           else
           Uart_Printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%4x,%2x,%2x,%s,%2x:%2x:%2x",year,month,day,date[weekday],hour,min,sec);
   //加23个'\b'是为了往前显示23位，以遮挡住前面原来显示的时间，使得看上去时间是显示在同一个位置，
   //原因就是后面显示的时间遮住前面显示的时间,注意一点：因为44B0本身函数库的问题，用Uart_GetIntNum()从超级终端中输入整数
   //时，不能使用2，3，6，7，9这几个数字，只能使用其他剩下的5个数来输入RTC的时间。
}

void DisplayRtc(void)
{
  
    rRTCCON = 0x01;    // R/W enable, 1/32768, Normal(merge), No reset
    Rtc_Init();
    while(1)
    {
	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("\n%4x,%2x,%2x,%s,%2x:%2x:%2x\n",year,month,day,date[weekday],hour,min,sec);
    rRTCCON = 0x00;    // R/W disable(for power consumption), 1/32768, Normal(merge), No reset
}
volatile int isRtcInt;

void __irq Rtc_Int(void)
{
    rI_ISPC=BIT_RTC;   
    //rI_ISPC; //is needed only when cache=on & wrbuf=on & BSFRD=0
    Uart_Printf("RTC Alarm Interrupt O.K.\n");
    isRtcInt=1;          //isRtcInt为中断服务子程序中访问的非局部变量，所有要设置关键字volatile表示它是有可能被
	                     //意想不到地改变的，告诉编译器每次访问时都要重新读数据而不是用以前寄存器中的备份
}


int Test_Rtc_Alarm(void)  
{
    Uart_Printf("[RTC Alarm Test for S3C44B0X]\n");
    Uart_Printf("Please check the VDDRTC connector or connect the VDD to Bt1+ !!!\n");

    Rtc_Init();

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

    rALMYEAR=rBCDYEAR ;
    rALMMON =rBCDMON;
    rALMDAY =rBCDDAY  ;
    rALMHOUR=rBCDHOUR ;
    rALMMIN =rBCDMIN  ;
    if(rBCDSEC<0X30)
    {
    rALMSEC =0x30;}
    else
    {
    rALMSEC =0x59;}


    isRtcInt=0;
    pISR_RTC=(unsigned int)Rtc_Int;
    rRTCALM=0x7f;
    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("Please check the VDDRTC connector or connect the VDD to Bt1+ !!!\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++);
}


/******************************************************************/

void Isr_Init(void)
{
    U32 i;
    
    pISR_UNDEF=(unsigned)HaltUndef;       //pISR_UNDEF中存贮的就是将要跳转的中断服务子程序的地址值，在这里将
    pISR_SWI  =(unsigned)HaltSwi;         //HaltUndef函数的入口地址赋给pISR_UNDEF，也即将值存入
    pISR_PABORT=(unsigned)HaltPabort;     //中断向量表中的(*(unsigned *)(_ISR_STARTADDRESS+0x4))存贮单元中。
    pISR_DABORT=(unsigned)HaltDabort;     //当未定义中断发生时，就会自动查询中断向量表中的未定义中断的向量值，也就是
	                                      //HaltUndef函数的入口地址，最后自动跳转到HaltUndef函数处执行
    
     for(i=_RAM_STARTADDRESS;i<(_RAM_STARTADDRESS+0x20);i+=4)
    {
	*((volatile unsigned *)i)=0xEA000000+0x1FFE;          //采用矢量中断模式
    }

    rINTCON=0x5;	  // Non-vectored,IRQ enable,FIQ disable    

    rINTMOD=0x0;	  // All=IRQ mode
    rINTMSK|=BIT_GLOBAL|BIT_EINT3;	  // All interrupt is disabled.
}


void HaltUndef(void)
{
    Uart_Printf("Undefined instruction exception!!!\n");
    while(1);
}

void HaltSwi(void)
{
    Uart_Printf("SWI exception!!!\n");
    while(1);
}

void HaltPabort(void)
{
    Uart_Printf("Pabort exception!!!\n");
    while(1);
}

void HaltDabort(void)
{
    Uart_Printf("Dabort exception!!!\n");
    while(1);
}