ldopwr_ex3_internalLDOEnabled.c

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/* --COPYRIGHT--,BSD
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
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 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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//******************************************************************************
//******************************************************************************
 
#include "driverlib.h"
 
void main (void)
{
    //Stop WDT
    WDT_A_hold(WDT_A_BASE);
 
    //Set P1.0 to output direction
    GPIO_setAsOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN0
        );
 
    //Detect if sufficient voltage at LDOI is present
    if (LDOPWR_LDO_INPUT_VALID == LDOPWR_isLDOInputValid(
            LDOPWR_BASE
            ) ){
        //Valid LDOI, LED on
        GPIO_setOutputHighOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0
            );
    } else   {
        //Clear P1.0 LED off
        GPIO_setOutputLowOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0
            );
    }
 
 
    //Enable access to config registers
    LDOPWR_unLockConfiguration(LDOPWR_BASE);
 
    //Clear all LDO-PWR IFGs before enabled IE bits
    LDOPWR_clearInterrupt(LDOPWR_BASE,
        LDOPWR_LDOI_VOLTAGE_GOING_OFF_INTERRUPT +
        LDOPWR_LDOI_VOLTAGE_COMING_ON_INTERRUPT +
        LDOPWR_LDO_OVERLOAD_INDICATION_INTERRUPT
        );
 
    //Enable LDO-PWR interrupts
    LDOPWR_enableInterrupt(LDOPWR_BASE,
        LDOPWR_LDOI_VOLTAGE_GOING_OFF_INTERRUPT +
        LDOPWR_LDOI_VOLTAGE_COMING_ON_INTERRUPT +
        LDOPWR_LDO_OVERLOAD_INDICATION_INTERRUPT
        );
 
 
    //Disbale access to config registers
    LDOPWR_lockConfiguration(LDOPWR_BASE);
 
    //Enter LPM3 w/ interrupts
    __bis_SR_register(LPM3_bits + GIE);
 
    //For debugger
    __no_operation();
}
 
//******************************************************************************
//
//This is the LDO_PWR_VECTOR interrupt vector service routine.
//
//******************************************************************************
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=LDO_PWR_VECTOR
__interrupt
#elif defined(__GNUC__)
__attribute__((interrupt(LDO_PWR_VECTOR)))
#endif
void LDOInterruptHandler (void)
{
    if (LDOPWR_getInterruptStatus(LDOPWR_BASE,
            LDOPWR_LDOI_VOLTAGE_COMING_ON_INTERRUPT
            )){
        //Enable access to config registers
        LDOPWR_unLockConfiguration(LDOPWR_BASE);
 
        //Software clear IFG
        //Its possible that current peaks due to charging cap
        //at LDOO might cause the LDOOVLIFG to trigger
        LDOPWR_clearInterrupt(LDOPWR_BASE,
            LDOPWR_LDO_OVERLOAD_INDICATION_INTERRUPT +
            LDOPWR_LDOI_VOLTAGE_COMING_ON_INTERRUPT
            );
 
        //Disbale access to config registers
        LDOPWR_lockConfiguration(LDOPWR_BASE);
 
        //Valid LDOI, LED on
        GPIO_setOutputHighOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0
            );
    } else if (LDOPWR_getInterruptStatus(LDOPWR_BASE,
                   LDOPWR_LDO_OVERLOAD_INDICATION_INTERRUPT
                   )){
        //Enable access to config registers
        LDOPWR_unLockConfiguration(LDOPWR_BASE);
 
        //Software clear IFG
        LDOPWR_clearInterrupt(LDOPWR_BASE,
            LDOPWR_LDO_OVERLOAD_INDICATION_INTERRUPT
            );
 
 
        //Disbale access to config registers
        LDOPWR_lockConfiguration(LDOPWR_BASE);
 
        //Over load indication; take necessary steps in application firmware
        while (1) ;
    } else if (LDOPWR_getInterruptStatus(LDOPWR_BASE,
                   LDOPWR_LDOI_VOLTAGE_GOING_OFF_INTERRUPT
                   )){
        //Enable access to config registers
        LDOPWR_unLockConfiguration(LDOPWR_BASE);
 
 
        //Software clear IFG
        LDOPWR_clearInterrupt(LDOPWR_BASE,
            LDOPWR_LDOI_VOLTAGE_GOING_OFF_INTERRUPT
            );
 
        //Disbale access to config registers
        LDOPWR_lockConfiguration(LDOPWR_BASE);
 
        //Voltage LDOI < launch voltage, LED off
        GPIO_setOutputLowOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0
            );
    }
}