#include <xc.h>
#include <stdbool.h>
#include <stdint.h>
//#include "LCD_Module_DOGM163S-A.h"

#define _XTAL_FREQ 8000000
#define LOOP_DELAY 1000


#define WARN_LED LATBbits.LATB0

#define SENSOR PORTBbits.RB1


uint8_t Read_DHT ( uint8_t *data );

void setup ( void )
{
    //    LCD_Module_Init();
    //    LCD_Module_ClearAll();
    //    TRISDbits.TRISD0 = 0;
    //    ANSELDbits.ANSD0 = 0;
    //    LATDbits.LATD0 = 1;

    OSCCON = 0b1110111;

    ANSELB = 0x00; // PORTB auf digital

    TRISBbits.TRISB0 = 0; // LED als OUTPUT
    LATBbits.LATB0 = 0; // LED aus

    TRISBbits.TRISB1 = 0; // Sensor als Ausgang
    LATBbits.LATB1 = 1; // LED aus



}

void loop ( void )
{
    while (1)
    
    
    
    uint8_t data[5] = { 0 };

    uint8_t result = Read_DHT( data );
    if ( result == 0 )
    {
        uint8_t int_RH = data[0];
        uint8_t dec_RH = data[1];
        uint8_t int_T = data[2];
        uint8_t dec_T = data[3];


        if ( int_RH > - )
        {
            WARN_LED = 1;
        }
        else
        {
            WARN_LED = 0;
        }
        //        LCD_Module_SetCursorPosition(1, 1);
        //        LCD_Module_WriteFormated_Int16(int_RH, "Humidity: %d%%");
    }
    //    else {
    //        LCD_Module_ClearAll();
    //        LCD_Module_SetCursorPosition(1, 1);
    //        if (result == 0xFF) {
    //            LCD_Module_WriteString("Error: Timeout");
    //        } else if (result == 0xFE) {
    //            LCD_Module_WriteString("Error: Checksum");
    //        }
    //    }


}

void main ( void )
{
    setup( );

    while ( 1 )
    {
        loop( );
        __delay_ms( LOOP_DELAY );
    }
}

uint8_t Read_DHT ( uint8_t *data )
{
    //    TRISDbits.TRISD0 = 0;
    //    LATDbits.LATD0 = 0;
    TRISBbits.TRISB1 = 0; // Sensor als Ausgang
    LATBbits.LATB1 = 0; // Sensor aus

    __delay_ms( 18 );

    //    LATDbits.LATD0 = 1;
    LATBbits.LATB1 = 1; // Sensor an

    __delay_us( 20 );


    //    TRISDbits.TRISD0 = 1;
    TRISBbits.TRISB1 = 1; // Sensor als Eingang

    uint16_t timeout = 10000;
    while ( SENSOR == 1 )
    {
        if ( --timeout == 0 )
        {
            return 0xFF;
        }
    }

    timeout = 10000;
    while ( SENSOR == 0 )
    {
        if ( --timeout == 0 )
        {
            return 0xFF;
        }
    }

    timeout = 10000;
    while ( SENSOR == 1 )
    {
        if ( --timeout == 0 )
        {
            return 0xFF;
        }
    }

    for ( uint8_t i = 0; i < 5; i++ )
    {
        for ( uint8_t j = 7; j != 255; j-- )
        {
            timeout = 10000;
            while ( SENSOR == 0 )
            {
                if ( --timeout == 0 )
                {
                    return 0xFF;
                }
            }

            uint8_t signal_counter = 0;
            timeout = 10000;
            while ( SENSOR == 1 )
            {
                signal_counter++;
                __delay_us( 1 );
                if ( signal_counter > 100 )
                {
                    return 0xFF;
                }
            }

            if ( signal_counter > 30 )
            {
                data[i] |= (1 << j);
            }
        }
    }

    if ( ( uint8_t ) (data[0] + data[1] + data[2] + data[3]) != data[4] )
    {
        return 0xFE;
    }

    return 0;
}