The Portable All Season Clothes Dryer

 /* Copyright (c) Alok Seth 13 July 2016 Code for FlexIO freedom board That Drives my Clothes Dryer */
#include <stdio.h>
#include "fsl_debug_console.h"
#include "fsl_common.h"
#include "fsl_rtc.h"
#include "board.h"

#include "pin_mux.h"
#include "clock_config.h"

#define Low  0
#define High 1
/*******************************************************************************
 * Definitions
 ******************************************************************************/


/*******************************************************************************
 * Prototypes
 ******************************************************************************/
void BOARD_SetRtcClockSource(void);
/*!
 * @brief Set the alarm which will be trigerred x secs later. The alarm trigger
 *        will print a notification on the console.
 *
 * @param offsetSec  Offset seconds is set for alarm.
 */

static void CommandSeconds(void);

/*!
 * @brief Get the current date time.
 *
 */



/*******************************************************************************
 * Variables
 ******************************************************************************/
static volatile uint8_t g_AlarmPending = 0U;
static volatile bool g_SecsFlag = false;



static char g_StrNewline[] = "\r\n";


/*******************************************************************************
 * Code
 ******************************************************************************/

void BOARD_SetRtcClockSource(void)
{
    /* Enable the RTC 32KHz oscillator */
    RTC->CR |= RTC_CR_OSCE_MASK;
}

uint32_t seconds_value = 0 ;
static void CommandSeconds(void)
{
    uint32_t count = 0U;
    rtc_datetime_t date;
    char sourceBuff[] = "\r10:10:00";

    g_SecsFlag = false;
    while (count < seconds_value)
    {
        /* If seconds interrupt ocurred, print new time */
        if (g_SecsFlag)
        {
            /* Build up the word */
            g_SecsFlag = false;
            count++;
            RTC_GetDatetime(RTC, &date);

            sourceBuff[1] = ((date.hour / 10) + 0x30);
            sourceBuff[2] = ((date.hour % 10) + 0x30);
            sourceBuff[3] = ':';
            sourceBuff[4] = ((date.minute / 10) + 0x30);
            sourceBuff[5] = ((date.minute % 10) + 0x30);
            sourceBuff[6] = ':';
            sourceBuff[7] = ((date.second / 10) + 0x30);
            sourceBuff[8] = ((date.second % 10) + 0x30);
            /* Print the time */
            PRINTF(sourceBuff);
        }
    }
    /* Disable Sec interrupt */
    RTC_DisableInterrupts(RTC, kRTC_SecondsInterruptEnable);
    PRINTF(g_StrNewline);
}



/*!
 * @brief Override the RTC IRQ handler.
 */
void RTC_IRQHandler(void)
{
    if (RTC_GetStatusFlags(RTC) & kRTC_AlarmFlag)
    {
        g_AlarmPending = 1U;

        /* Clear alarm flag */
        RTC_ClearStatusFlags(RTC, kRTC_AlarmInterruptEnable);
    }
}

/*!
 * @brief Override the RTC Second IRQ handler.
 */
void RTC_Seconds_IRQHandler(void)
{
    g_SecsFlag = true;
}

/*!
 * @brief Main function
 */
int main(void)
{

    rtc_config_t rtcConfig;
    rtc_datetime_t date;

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


    /*Hey let us set the output pin 1 is output 0 is Input */
    gpio_pin_config_t pin_config = {kGPIO_DigitalOutput,1,};
   /* I am using PortB pin 16U or PTB16 as in image as the output pin */
    GPIO_PinInit(GPIOB, 16U, &pin_config);
    /* This is the extreme corner Pin of the FRDM-K82F board and by setting it for my app I leave plenty of space to connect more leads for further addition of
     * more features */
    /* Initialize the  RTC that would drive our dryer */

    RTC_GetDefaultConfig(&rtcConfig);
    RTC_Init(RTC, &rtcConfig);
    /* Select RTC clock source */
    BOARD_SetRtcClockSource();

    /* Set a start date time and start RTC. You can set any date here I made it 2016 as its the year of this build and 19th may is my birthday.Hr/Min/Sec as 00 would
     * look cool on the console or if I were to later attach a LCD to keep a track of the total run time of the Dryer
     */
    date.year = 2016U;
    date.month = 05U;
    date.day = 19U;
    date.hour = 00U;
    date.minute = 00U;
    date.second = 00U;

    /* RTC time counter needs to be stopped before setting the date & time in the TSR register (read it in one of the manuals)*/
    RTC_StopTimer(RTC);

    RTC_SetDatetime(RTC, &date);

    /* Enable at the NVIC */
    EnableIRQ(RTC_IRQn);
    EnableIRQ(RTC_Seconds_IRQn);

    /* Start the RTC time counter */
    RTC_StartTimer(RTC);


    while (1)
    {

            	GPIO_WritePinOutput (GPIOB, 16U, High);
                RTC_EnableInterrupts(RTC, kRTC_SecondsInterruptEnable);
                seconds_value = 45 ;
                CommandSeconds(); // this function makes the Dryer run for 45 seconds


                GPIO_WritePinOutput (GPIOB, 16U, Low);
                RTC_EnableInterrupts(RTC, kRTC_SecondsInterruptEnable);
                seconds_value = 90 ; // to set the value of timer for cooling off the dryer
                CommandSeconds(); // this function enables the dryer blower to be switched off for 90 seconds so that it may cool down

    }
}