#include <htc.h>

__CONFIG (LVP_OFF & WDTE_OFF);              //Low Voltage Programming OFF

                                            // Watch dog timer off

void ausgabe (char min_einer);



void main (void)

{

    OSCCON= 0b01110111;                     //Unimplemented

                                            //111 8MHz

                                            //OSTS Internal Oszillator

                                            //HTS HFINTOSC ist stable

                                            //LTS LFINTOSC is stable

                                            //SCS Internal oscillator is used for system clock

    TRISC   = 0;                            //Port C als Ausgang

    TRISB1  = 0;

    TRISB2  = 0;

    TRISB3  = 0;

    TRISD   = 0;                            //Port D als Ausgang

    ANS8    = 0;

    ANS9    = 0;

    ANS10   = 0;

    RB1=1;

    RC0=0;

    RC2=1;

    RB3=0;

    RB2=0;

    RB3=1;









    }

















    int umrechnen(void)        // Rechnet Timer Ausgang in Minuten um, Minuten werden auf "min_einer" ausgegeben.

 {

    unsigned int ms;

    unsigned int min_einer;

    unsigned int min_zehner;

    OPTION_REG= 0b11000010;     //Pull up disable

                                //Interrupt on rising edge of INT pin

                                //Internal cycle clock

                                //Increment on Low to high transition on T0CKI

                                //PSA assigned to timer0

                                //Prescaler 1:8

    INTCON= 11100100;           //Enable all unmasked interrupts

                                //Enables all unmasked peripheral interrupts

                                //Enables the INT external interrupt

                                //Disables the INT external interrupt

                                //Disables the PORTB change interrupt

                                //TMR0 Register has overflowed (cleared in software)

                                //INT external interrupt did not occur

                                //None of the PORTB general purpose I/O pins have changed state

 TMR0 = 0;                   //Timer0 auf 0 Setzen

 T0IF = 0;                   //Interrupt Flag zurücksetzen

 PORTC=0b00000000;           //PORTC rücksetzen

 TMR0 = 6;









        if (T0IF)

        {

            ms=ms+1;            //Counter bei Timerüberlauf um 1 erhöhen

            T0IF=0;             //Interrupt Flag zurücksetzen

            TMR0=6;             //Timer preload auf 6 stellen

        }



        if (ms==60000)

        {

            min_einer=min_einer+1;

            ms=0;

        }



        if (min_einer==9)

        {

            min_zehner=min_zehner+1;

            min_einer=0;

        }



        if (min_zehner==9)

        {

            min_zehner=0;

        }



    return 0;



}











//-----------------------------------------------------------------------------







   void ausgabe(char min_einer)

{











    if  (min_einer==9)      //7Segment 0

    {

        PORTC=0b00000000;

        PORTD=0b00000000;

    }

    if  (min_einer==8)      //7Segment 1

    {

        PORTC=0b00010000;

        PORTD=0b00010000;

    }

    if  (min_einer==7)      //7Segment 2

    {

        PORTC=0b00100000;

        PORTD=0b00100000;

    }

    if  (min_einer==6)      //7Segment 3

    {

        PORTC=0b00110000;

        PORTD=0b00110000;

    }

    if  (min_einer==5)      //7Segment 4

    {

        PORTC=0b01000000;

        PORTD=0b01000000;

    }

    if  (min_einer==4)      //7Segment 5

    {

        PORTC=0b01010000;

        PORTD=0b01010000;

    }

    if  (min_einer==3)      //7Segment 6

    {

        PORTC=0b01100000;

        PORTD=0b01100000;

    }



    if  (min_einer==2)      //7Segment 7

    {

        PORTC=0b01110000;

        PORTD=0b01110000;

    }

    if  (min_einer==1)      //7Segment 8

    {

        PORTC=0b10000000;

        PORTD=0b10000000;

    }



    if  (min_einer==0)      //7Segment 9

    {

        PORTC=0b10010000;

        PORTD=0b10010000;

    }









}