MSP430F4132 LPM3 Wake Up on Basic Timer

Hello Jerry,

Try the following example and let us know if it enters the ISR correctly.  Work backwards from there to figure out what is wrong with your setup.

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//******************************************************************************
//  MSP-FET430P410 Demo - FLL+, LPM3 Using Basic Timer ISR, 32kHz ACLK
//
//  Description: System runs normally in LPM3 with basic timer clocked by
//  32kHz ACLK. At a 2 second interval the basic timer ISR will wake the
//  system and flash the LED on P5.1 inside of the Mainloop.
//  ACLK = LFXT1 = 32768, MCLK = SMCLK = DCO = 32xACLK = 1.048576MHz
//  //*External watch crystal on XIN XOUT is required for ACLK*//	
//
//
//            MSP430F413
//         ---------------
//     /|\|            XIN|-
//      | |               | 32kHz
//      --|RST        XOUT|-
//        |               |
//        |           P5.1|-->LED
//
//  M. Buccini
//  Texas Instruments Inc.
//  Feb 2005
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.21A
//*****************************************************************************
#include <msp430.h>

int main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  FLL_CTL0 |= XCAP14PF;                     // Configure load caps
  IE2 |= BTIE;                              // Enable BT interrupt
  BTCTL = BTDIV+BTIP2+BTIP1+BTIP0;          // 2s Interrupt
  P1DIR = 0xFF;                             // All P1.x outputs
  P1OUT = 0;                                // All P1.x reset
  P2DIR = 0xFF;                             // All P2.x outputs
  P2OUT = 0;                                // All P2.x reset
  P3DIR = 0xFF;                             // All P3.x outputs
  P3OUT = 0;                                // All P3.x reset
  P4DIR = 0xFF;                             // All P4.x outputs
  P4OUT = 0;                                // All P4.x reset
  P5DIR = 0xFF;                             // All P5.x outputs
  P5OUT = 0;                                // All P5.x reset
  P6DIR = 0xFF;                             // All P6.x outputs
  P6OUT = 0;                                // All P6.x reset

  while(1)
  {
    int i;
    __bis_SR_register(LPM3_bits + GIE);     // Enter LPM3 w/ interrupts
    P5OUT |= 0x02;                          // Set P5.1 LED on
    for (i = 5000; i>0; i--);               // Delay
    P5OUT &= ~0x02;                         // Clear P5.1 LED off
  }
}

// Basic Timer interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=BASICTIMER_VECTOR
__interrupt void basic_timer(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(BASICTIMER_VECTOR))) basic_timer (void)
#else
#error Compiler not supported!
#endif
{
    __bic_SR_register_on_exit(LPM3_bits);   // Clear LPM3 bits from 0(SR)
}

Regards, Ryan