timer_a_ex5_pwmMultipleUp.c

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/* --COPYRIGHT--,BSD
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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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"
 
#define TIMER_PERIOD 511
#define DUTY_CYCLE1  384
#define DUTY_CYCLE2  128
 
void main (void)
{
    //Stop WDT
    WDT_A_hold(WDT_A_BASE);
 
    //P1.2 and P1.3 output
    //P1.2 and P1.3 options select
    GPIO_setAsPeripheralModuleFunctionOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN2 + GPIO_PIN3,
        GPIO_PRIMARY_MODULE_FUNCTION
        );
 
    /*
     * Disable the GPIO power-on default high-impedance mode to activate
     * previously configured port settings
     */
    PMM_unlockLPM5();
 
    //Start timer
    Timer_A_initUpModeParam param = {0};
    param.clockSource = TIMER_A_CLOCKSOURCE_SMCLK;
    param.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;
    param.timerPeriod = TIMER_PERIOD;
    param.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_DISABLE;
    param.captureCompareInterruptEnable_CCR0_CCIE =
        TIMER_A_CCIE_CCR0_INTERRUPT_DISABLE;
    param.timerClear = TIMER_A_DO_CLEAR;
    param.startTimer = false;
    Timer_A_initUpMode(TIMER_A1_BASE, &param);
 
    Timer_A_startCounter(   TIMER_A1_BASE,
        TIMER_A_UP_MODE
        );
 
    //Initialize compare mode to generate PWM1
    Timer_A_initCompareModeParam initComp1Param = {0};
    initComp1Param.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1;
    initComp1Param.compareInterruptEnable = TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE;
    initComp1Param.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET;
    initComp1Param.compareValue = DUTY_CYCLE1;
    Timer_A_initCompareMode(TIMER_A1_BASE, &initComp1Param);
 
    //Initialize compare mode to generate PWM2
    Timer_A_initCompareModeParam initComp2Param = {0};
    initComp2Param.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_2;
    initComp2Param.compareInterruptEnable = TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE;
    initComp2Param.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET;
    initComp2Param.compareValue = DUTY_CYCLE2;
    Timer_A_initCompareMode(TIMER_A1_BASE, &initComp2Param);
 
    //Enter LPM0
    __bis_SR_register(LPM0_bits);
 
    //For debugger
    __no_operation();
}