wdt_a_ex2_intervalACLK.c

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 * Copyright (c) 2017, Texas Instruments Incorporated
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 *    notice, this list of conditions and the following disclaimer in the
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 *    from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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//******************************************************************************
//******************************************************************************
#include "driverlib.h"
 
void main (void)
{
    //Initialize WDT module in timer interval mode,
    //with ACLK as source at an interval of 250 ms.
    WDT_A_initIntervalTimer(WDT_A_BASE,
        WDT_A_CLOCKSOURCE_ACLK,
        WDT_A_CLOCKDIVIDER_8192);
 
    WDT_A_start(WDT_A_BASE);
 
    //Enable Watchdog Interupt
    SFR_clearInterrupt(SFR_WATCHDOG_INTERVAL_TIMER_INTERRUPT);
    SFR_enableInterrupt(SFR_WATCHDOG_INTERVAL_TIMER_INTERRUPT);
 
    //Set P1.0 to output direction
    GPIO_setAsOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN0
        );
 
    /*
     * Disable the GPIO power-on default high-impedance mode to activate
     * previously configured port settings
     */
    PMM_unlockLPM5();
 
    //Enter LPM3, enable interrupts
    __bis_SR_register(LPM3_bits + GIE);
    //For debugger
    __no_operation();
}
 
//Watchdog Timer interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=WDT_VECTOR
__interrupt
#elif defined(__GNUC__)
__attribute__((interrupt(WDT_VECTOR)))
#endif
void WDT_A_ISR (void)
{
    //Toggle P1.0
    GPIO_toggleOutputOnPin(
        GPIO_PORT_P1,
        GPIO_PIN0);
}