CCS/MSP430FR6972: msp430fr6972

What do you have so far? Example msp430fr6x7x_rtc_02.c gives the overall setup:

https://dev.ti.com/tirex/explore/node?node=AMqRzK8tUCmNb7bzAweYxg__IOGqZri__LATEST

That uses RTCTEV=0 which triggers RTCTEVIFG every minute, on the minute. [Ref User Guide (SLAU367P) Table 29-7]. You could use RTCTEV=1 to trigger every hour on the hour (and count to 2). 

To trigger every 2 hours starting now (not on the hour) don't use RTCEVIFG, rather RTCAIFG (Alarm).

1) To start, add 2 (hours) to the current contents of RTCHOUR, set the AE bit (0x80) and store it in RTCAHOUR.[Ref UG Table 29-30]. Then take the contents of RTCMIN, set the AE bit, and store it in RTCAMIN. Then enable RTCAIE.

2) Each time you interrupt (RTCIV_RTCAIFG), add 2 (hours) to RTCAHOUR (modulo 24), set the AE bit and put it back into RTCAHOUR.

System reset doesn't (in general) clean up the RTC registers, so you should fill in most things. Some of the considerations are given in UG Sec 29.2.3

[Edit: Added setting RTCAMIN as well]

Hi,

Thank you very much for your reply.

I am now making one program for only 5 minutes.

Can you check it please.

RTC INTERRUPT :

#pragma vector=RTC_VECTOR
__interrupt void RTC_ISR(void)
{
    switch(__even_in_range(RTCIV, RTCIV_RT1PSIFG))
    {
        case RTCIV_NONE:      break;        // No interrupts
        case RTCIV_RTCOFIFG:  break;        // RTCOFIFG
        case RTCIV_RTCRDYIFG:               // RTCRDYIFG
      //      putchar('R');
      //      LPM3_EXIT;
            break;
        case RTCIV_RTCTEVIFG:               // RTCEVIFG
//            __no_operation();               // Interrupts every minute

     //       putchar('R');
     //       LPM3_EXIT;
            break;
        case RTCIV_RTCAIFG:
            putchar('R');
            LPM3_EXIT;
             break;                         // RTCAIFG

        case RTCIV_RT0PSIFG:  break;        // RT0PSIFG
        case RTCIV_RT1PSIFG:  break;        // RT1PSIFG
        default: break;
    }
}


MAIN PROGRAM  :

int main(void)
{
   WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer


     PJSEL0 = BIT4 | BIT5 ;                   // For LFXT
       //     PJSEL0 |= BIT6 | BIT7;                   // For LFXT

      //===================interrupt touch key======================================

     //          P1IES = BIT1;                             // P1.2 Hi/Lo edge
     //          P1IFG = 0;                                // Clear all P1 interrupt flags
     //          P1IE = BIT1;                              // P1.2 interrupt enabled
    //========================================================================


            PM5CTL0 &= ~LOCKLPM5;

             // XT1 Setup
             CSCTL0_H = CSKEY >> 8;                    // Unlock CS registers
             CSCTL1 = DCOFSEL_0;                       // Set DCO to 1MHz
             CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK;
             CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;     // Set all dividers to 1
             CSCTL4 &= ~LFXTOFF;                       // Enable LFXT1
             do
             {
               CSCTL5 &= ~LFXTOFFG;                    // Clear XT1 fault flag
               SFRIFG1 &= ~OFIFG;
             }while (SFRIFG1&OFIFG);                   // Test oscillator fault flag
             CSCTL0_H = 0;                             // Lock CS registers

  //=====================================
             GPIO_init();
             LCD_init();
             UART_init();
             lcd_display_buf();

 //============================Interrupt==============
             P1IES |= 0x02;                            // P1.1
             P1IFG &= ~0x02;                           // P1.1
             P1IE |= 0x02;                             // P1.1

 //====================TIMER==========================
             TA0CCTL0 |= CCIE;
             TA0CCR0 = 32768;
             TA0CTL |= TASSEL_1 | MC_1 ;

//===================RTC===============================

                 RTCCTL0_H = RTCKEY_H;                              // Unlock RTC
     //            RTCCTL0_L = RTCOFIE | RTCAIE | RTCRDYIE | RTCTEVIE;        // enable RTC read ready interrupt
                                                         // enable RTC time event interrupt
                 RTCCTL0_L = RTCAIE;

               //  RTCCTL1 = RTCBCD | RTCHOLD | RTCMODE;   // RTC enable, BCD mode, RTC hold
                 RTCCTL1 = RTCBCD | RTCHOLD | RTCMODE | RTCTEV_0;                   ////Now trying for minutes (5 minutes)

                     RTCYEAR = 0x2010;                       // Year = 0x2010
                     RTCMON = 0x4;                           // Month = 0x04 = April
                     RTCDAY = 0x05;                          // Day = 0x05 = 5th
                     RTCDOW = 0x01;                          // Day of week = 0x01 = Monday
                     RTCHOUR = 0x10;                         // Hour = 0x10
                     RTCMIN = 0x32;                          // Minute = 0x32
                     RTCSEC = 0x45;                          // Seconds = 0x45

                     RTCAHOUR = 0x12;                       //0b10000010
                     RTCAMIN =  0x15;                      //0b10000101

                    RTCCTL1 &= ~(RTCHOLD);                  // Start RTC

                      putchar('5');
                         

                         while(1)
                     {
                          __bis_SR_register(LPM3_bits | GIE);

             }
//  return 0;
}
     
NOTE  : I am using UART, PORT interrupt, Timer,LCD also.(These are working fine)  

I AM TRYING FOR  MINUTES, BUT IT IS NOT WORKING.(In 'RTCIV_RTCTEVIFG' : working for only 1 minutes)

Regards,

Srijit

>                    RTCAMIN =  0x15;                      //0b10000101

This doesn't set the AE bit. It also is (in BCD) (15+60-32)=43 minutes from RTCMIN, not 5 minutes. Try something like:

Hi,

>>RTCAMIN =  0x15;

This doesn't set the AE bit. It also is (in BCD) (15+60-32)=43 minutes from RTCMIN, not 5 minutes.  :

   Can you plase explain it ?

>> "RTCAMIN =  0x37 | MINAE;"  : Please explain this one also!!

Waiting for your reply.

Regards,

Srijit

>> "RTCAMIN =  0x37 | MINAE;"  :

                         MINAE is showing error in compilation.

Result is  : "MINAE" is Undefined. 

Try adding:

> #define MINAE 0x80   // Alarm enable

[Edit: Apparently I picked out the wrong header file. Try instead:

> RTCAMIN =  0x37 | RTCAE;

Either way will work.]

hello,

1)

"> RTCAMIN =  0x37 | RTCAE;" 

I have changed the RTCAMIN values.

2) In ISR PART :

         case RTCIV_RTCAIFG:

         putchar('R');

        LPM3_EXIT;
        break;

THIS time the Data is not transmitting.