/*
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o 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.
 *
 * o Neither the name of Freescale Semiconductor, Inc. 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, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "fsl_debug_console.h"
#include "board.h"

#include "fsl_lptmr.h"
#include "fsl_gpio.h"

#include "pin_mux.h"
#include "clock_config.h"
/*******************************************************************************
 * Definitions
 ******************************************************************************/
#define LPTMR_LED_HANDLER LPTMR0_IRQHandler
/* Get source clock for LPTMR driver */
#define LPTMR_SOURCE_CLOCK CLOCK_GetFreq(kCLOCK_LpoClk)
/* Define LPTMR microseconds counts value */
#define LPTMR_USEC_COUNT 1000000U
#define LED_INIT() LED_RED_INIT(LOGIC_LED_ON)
#define LED_TOGGLE() LED_RED_TOGGLE()

/*******************************************************************************
 * Prototypes
 ******************************************************************************/

/*******************************************************************************
 * Variables
 ******************************************************************************/

volatile uint32_t lptmrCounter = 0U;

/*******************************************************************************
 * Code
 ******************************************************************************/
void LPTMR_LED_HANDLER(void)
{
    LPTMR_ClearStatusFlags(LPTMR0, kLPTMR_TimerCompareFlag);
    lptmrCounter++;
    LED_TOGGLE();
}

/*!
 * @brief Main function
 */
int main(void)
{
    uint32_t currentCounter = 0U;
    lptmr_config_t lptmrConfig;

    LED_INIT();

    /* Board pin, clock, debug console init */
    BOARD_InitPins();
    BOARD_BootClockRUN();
    BOARD_InitDebugConsole();

    /* Configure LPTMR */
    /*
     * lptmrConfig.timerMode = kLPTMR_TimerModeTimeCounter;
     * lptmrConfig.pinSelect = kLPTMR_PinSelectInput_0;
     * lptmrConfig.pinPolarity = kLPTMR_PinPolarityActiveHigh;
     * lptmrConfig.enableFreeRunning = false;
     * lptmrConfig.bypassPrescaler = true;
     * lptmrConfig.prescalerClockSource = kLPTMR_PrescalerClock_1;
     * lptmrConfig.value = kLPTMR_Prescale_Glitch_0;
     */
    LPTMR_GetDefaultConfig(&lptmrConfig);

    /* Initialize the LPTMR */
    LPTMR_Init(LPTMR0, &lptmrConfig);

    /* Set timer period */
    LPTMR_SetTimerPeriod(LPTMR0, USEC_TO_COUNT(LPTMR_USEC_COUNT, LPTMR_SOURCE_CLOCK));

    /* Enable timer interrupt */
    LPTMR_EnableInterrupts(LPTMR0, kLPTMR_TimerInterruptEnable);

    /* Enable at the NVIC */
    EnableIRQ(LPTMR0_IRQn);

    PRINTF("Low Power Timer Example\r\n");

    /* Start counting */
    LPTMR_StartTimer(LPTMR0);
    while (1)
    {
        if (currentCounter != lptmrCounter)
        {
            currentCounter = lptmrCounter;
            PRINTF("LPTMR interrupt No.%d \r\n", currentCounter);
        }
    }
}
