Can TimerA wake up LPM3?

Kai-Jung Shih said:

Can TimerA wake up MSP430 from LPM3 to active mode?

YES

but in you code is error,

you set timerA clock as SMCLK (TASSEL_2) but SMCLK in LPM3 is dissabled

you should set timarA clock as ACLK (TASSEL_1)

TACTL = MC_1 | TASSEL_1 | TACLR;

as source ACLK you can use LFXT1CLK (external crystal) or VLOCLK (internal oscylattor)

below i pasted you code with few modyfication ( I add interrupts)

/*
* main.c
*/
#include<msp430g2553.h>
#define LED1 BIT0
#define LED2 BIT6

void main(void)
{
    WDTCTL = WDTPW | WDTHOLD;                   // Stop watchdog timer
    P1DIR = LED1 + LED2;                        // Set pins for LED1, 2 to output
    P1OUT = ~LED1;                              // Preload LED1 on, LED2 off
                       
    TACCTL0 = CCIE;    				// CCR0 interrupt enabled                       
    TACCR0  = 65535- 1;				// Upper limit of count for TAR


    TACTL = MC_1 | TASSEL_1 | TACLR;            // Set up and start Timer A: "up to CCR0" mode, divide clock by 8, clock from SMCLK, clear timer
   
    for(;;)                                     // Loop forever
    {
        __bis_SR_register(LPM3_bits + GIE);

        P1OUT ^= LED1 + LED2;                   // Toggle LEDs
    }                                           // Back around infinite loop
}

// Timer A0 interrupt service routine
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{
  __bic_SR_register_on_exit(LPM3_bits);
}

ACLK will be set automaticly,

(external oscyllator or if not exist then internal oscyllator vlo)

TimerA0 interrupt service routine is defined in trf796xBoosterPack

#pragma vector=TIMER0_A0_VECTOR
__interrupt void
timerHandler(void)
{
    u08_t irq_status[4];

    STOP_COUNTER;

    irq_flag = 0x02;

    Trf796xReadIrqStatus(irq_status);

    *irq_status = *irq_status & 0xF7;                // set the parity flag to 0

    if(*irq_status == 0x00 || *irq_status == 0x80)
    {
        i_reg = 0x00;                                // timer interrupt
    }
    else
    {
        i_reg = 0x01;
    }

}

because I ask you abut usage of trf796xBoosterPack

so you cant duplicate service routine,

for you purpose you must use another service routine

( I see that timerA1 is free )

hi,

you didn't change configuration (in isr declaration also was mistake)

below I paste you fixed code (Timer1 configuration), check it

/*
* main.c
*/
#include<msp430g2553.h>
#define LED1 BIT0
#define LED2 BIT6

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

    P1DIR =   LED1 + LED2;                        // Set pins for LED1, 2 to output
    P1OUT =   LED1;                              // Preload LED1 on, LED2 off
    P1OUT &=~ LED2;  
    
    TA1CCTL0 = CCIE;                             // CCR0 interrupt enabled
    TA1CCR0  = 5535;                             // Upper limit of count for TAR
    TA1CTL = MC_1 | TASSEL_1 | TACLR;            // Set up and start Timer A: "up to CCR0" mode, clock from ACLK, clear timer
    
    for(;;)
    {
        __bis_SR_register(LPM3_bits + GIE);     //
        P1OUT ^= LED1 + LED2;                   // Toggle LEDs
    }
}
// Timer1 A0 interrupt service routine
#pragma vector=TIMER1_A0_VECTOR
__interrupt void Timer_A (void)
{
  __bic_SR_register_on_exit(LPM3_bits);
}