CCS/MSP430G2553: Working MSP430g2553 Hang

Are you using a LaunchPad, EVM, or custom board? What FET tool is being used and what device are you communicating with? What is your system frequency/baud rate and what code examples did you source from? Have you used the CCS debugger or oscilloscope/logic analyzer images to further investigate your issue?

Regards,
Ryan

Thanks Ryan,

msp430g2553 is communicating with soc(TI DM814X) uart ,  using  16MHz freq. & 115200 baud rate, in my stress testing some time i seen when i given extern interrupt on interrupt pin.

my msp hang(its very rare). but it's happen.

Code::

#pragma vector=PORT2_VECTOR
__interrupt void Port_2(void)
{
    if (P2IFG & BIT5)
    {
        P2IFG &= ~BIT5;                         // P2.5 IFG cleared
        P2IE &= ~BIT5;                         // P2.5 interrupt disabled
    }
}

TA1CCTL0 = CCIE;                                   // enable timer isr to handle this events
TA1CCR0  = TIMER1_DURATION_10m;
 TA1CTL   = TASSEL_2 + ID_3 + MC_1 + TACLR;

}

// in my timer1 isr

#pragma vector=TIMER1_A0_VECTOR
__interrupt void Timer_A1 (void)
{

if (P2IES & BIT5)
{
                if (!(PORT5 & BIT5))
                {
               
                    P2IES ^= (BIT5) ;                        // Now we need to change the IES bit to detect opposite event.
                    P2IE |= BIT5;                         // P2.5 interrupt enabled
                }
                else
                    P2IE |= BIT5;                         // P2.5 interrupt enabled
            }
            // If 0 i.e. Low -> High was detected
            else if (!(P2IES & BIT5))
            {
                if (IGNDET_PORT & IGNDET_PIN)
                {
                    P2IES ^= (BIT5) ;                        // Now we need to change the IES bit to detect opposite event.
                    P2IE |= BIT5;                         // P2.5 interrupt enabled
                 }
                else
                    P2IE |= BIT5;                         // P2.5 interrupt enabled
            }
        TA1CCTL0 &= ~CCIE;                                   // interrupt disabled
        TA1CTL =   TASSEL_2 + ID_3+ MC_0 + TACLR;           // SMCLK, up-mode, clear TAR

}

Where exactly does the code get stuck or hang? You have not shared any USCI/UART code, the issue could possibly be due to a priority conflict between the timer and USCI ISRs. Are you entering any LPMs during operation? More debugging efforts are still required.

Regards,
Ryan