RTC with external 32.768kHz oscillator on lpc2378

(I don't know much about this.)

Does your RTCInit() look like the below?

void RTCInit( void )
{
  alarm_on = 0;

  /*--- Initialize registers ---*/
  RTC_AMR = 0;
  RTC_CIIR = 0;
  RTC_CCR = 0;
  RTC_PREINT = PREINT_RTC;
  RTC_PREFRAC = PREFRAC_RTC;
  return;
}

If it does, please check the "RTC_CIIR = 0;"
(Counter Increment Interrupt Register)

Thanks for answering. I tryed a lot of different initialization but I took care about the RTC_CIIR register. Actually, here is my RTCinit() :

void RTCInit( void )
{
    alarm_on = 0;
    PCONP |= (1<<9); /* must be powered during configuration*/
    /*--- Initialize registers ---*/
    RTC_ILR = ILR_RTCALF | ILR_RTCCIF; /* Disable 32'768 interrupt */
    RTC_AMR = 0;  /* alarm mask register */
    RTC_CIIR = 0; /* counter increment interrupt */
    RTC_CCR |= CCR_CLKSRC;  /* CCR_CLKSRC = 0x10 : external oscillator */

/*    //RTC_PREINT = PREINT_RTC;    // 0
    //RTC_PREFRAC = PREFRAC_RTC;  // 0  */

    RTC_CIIR |= 1; /* sec interrupt */
    return;
}

Any idea ?
Thanks again.

Maybe, add the below code to your RTCInit()

  RTC_CISS = 0;

(Counter Increment Select Mask Register)

What does your RTCHandler() do?

You said that your code doesn't work in normal mode.

"When not in debug mode, it seems that interrupt is never fired."

If the "Counter Increment Interrupt" is fired, what will you see?

Could you please confirm that, in debug mode, you really get a "Counter Increment Interrupt" (RTCCIF)? not an "alarm registers generated interrupt" (RTCALF), neither a "Counter Increment Sub-Seconds interrupt" (RTSSF).

Well, I finally find my problem : it comes from the hardware. The crystal on my MCB2300 seems to be broken. I should have check it before but the behaviour in debug mode had confused me (crazy behaviour that made a clock without external oscillator)! Moreover, I used to trust keil's hardware.
Anyway, it's working now and I understand what was going on, so that's the point !
Thanks again John.

" ... behaviour in debug mode had confused me (crazy behaviour that made a clock without external oscillator)!"

Are you sure it was just debug mode, and not the Simulator...?

No, I've just checked again. I used ULINK ARM Debugger...
It seems that the RTC was using the main clock and not the external oscillator. It's so weird but I've lost enough time to investigate it.

Dear Aurelien
Shyam here, Do u rememember? that u send me code during my SPI communication.

here I am sending Whole (RTC initalation ,RTC_ISR) RTC code which is I implemented in my project.

void InitRTC(void)
{
//  Enable power for RTC
        PCONP |= 0x200;
//  CTC reset and select RTC clock from 32 Khz.oscillator
        RTC_CCR = 0x12;
//  Clear RTC interrupt register
        RTC_ILR = 0xFF;
//  Dasable all the alrams.
        RTC_AMR = 0xFF;
//  Enable only second count interrupt.
        RTC_CIIR = 0x01;            // minute
//  Disable all subsecond interrupts.
        RTC_CISS = 0;
//  Enable RTC
        RTC_CCR = 0x11;
        return;
}
void Set_RTC(RTC Time)
{
        RTC_CCR &= 0xFE;
        RTC_SEC = Time.RTC_Sec;
//  Minute value [0-59]
        RTC_MIN = Time.RTC_Min;
//  Hour value [0-23]
        RTC_HOUR = Time.RTC_Hour;
//  Day of week value [0-6]
        RTC_DOW = Time.RTC_Wday;
//  Day of month value [1-31]
        RTC_DOM = Time.RTC_Mday;
//  Month value [1-12]
        RTC_MONTH = Time.RTC_Mon;
//  Year value
        RTC_YEAR = Time.RTC_Year;
//  Day of year value [1-365]
        RTC_DOY = Time.RTC_Yday;
        RTC_CCR |= 0x01;
        return;
}
RTC Read_RTC(void)
{
        RTC Local_time;
        Local_time.RTC_Sec = ((RTC_CTIME0 & 0x0000003F)>>0);
        rtcdata = ((RTC_CTIME0 & 0x0000003F)>>0);
//  Minute value [0-59]
        Local_time.RTC_Min = ((RTC_CTIME0 & 0x00003F00)>>8);
//  Hour value [0-23]
        Local_time.RTC_Hour = ((RTC_CTIME0 & 0x001F0000)>>16);
//  Day of week value [0-6]
        Local_time.RTC_Wday = ((RTC_CTIME0 & 0x07000000)>>24) ;
//  Day of month value [1-31]
        Local_time.RTC_Mday = ((RTC_CTIME1 & 0x0000001F)>>0);
//  Month value [1-12]
        Local_time.RTC_Mon = ((RTC_CTIME1 & 0x0000FF00)>>8);
//  Year value
        Local_time.RTC_Year = ((RTC_CTIME1 & 0x0FFF0000)>>16);
//  Day of year value [1-365]
        Local_time.RTC_Yday = RTC_DOY;
        RTC_CCR |= 0x01;
        return (Local_time);
}
void RTC_ISR (void) __irq
{

        if (RTC_ILR &=0x00000001)
        {

             Count++;
        }
        RTC_ILR = 0x00000001;
        VICVectAddr = 0x00000000;
}

if any problem give me meg.

Thanks
Shyam T.

Thanks a lot Shyam but as I have said before, it was an hardware issue. My code is working. But thanks again, I really appreciate it.