lv8pa

/*
 * File:   lv8.c
 * Author: NA
 *
 * Created on Decembar 2018
 */


#include <xc.h>

#pragma config FOSC=HS,WDTE=OFF,PWRTE=OFF,MCLRE=ON,CP=OFF,CPD=OFF,BOREN=OFF,CLKOUTEN=OFF
#pragma config IESO=OFF,FCMEN=OFF,WRT=OFF,VCAPEN=OFF,PLLEN=OFF,STVREN=OFF,LVP=OFF

#define _XTAL_FREQ 8000000


char brojac=0, gornja=0, donja=0,smjer=0;
//*********************************************************************
void write(char eepromAddress, char eepromData)
{
    unsigned char gie_Status;

    EECON1bits.EEPGD=0;
    EECON1bits.CFGS=0;


    while(WR);            // check the WR bit to see if a previous Write operation is in progress
    EEADR=eepromAddress;  // Write the address to EEADR.
    EEDATA=eepromData;    // load the 8-bit data value to be written in the EEDATA register.
    WREN=1;               // Set the WREN bit to enable eeprom operation.
    gie_Status = GIE;     // Copy the current Interrupt state
    GIE = 0;              // Disable the interrupts
    EECON2=0x55;          // Execute the special instruction sequence
    EECON2=0xaa;          // Refer the datasheet for more info
    WR=1;                 // Set the WR bit to trigger the eeprom write operation.
    GIE = gie_Status;     // Restore the interrupts
    WREN=0;               // Disable the EepromWrite
}
//*********************************************************************
char read(char eepromAddress)
{
    EECON1bits.EEPGD=0;
    EECON1bits.CFGS=0;
    while(RD || WR);           // check the WR&RD bit to see if a RD/WR is in progress
    EEADR=eepromAddress;       // Write the address to EEADR.
    RD = 1;                    // Set the RD bit to trigger the eeprom read operation.
    return(EEDATA);            // Return the data read form eeprom.
}
//**********************************************************************

write(0x00,smjer);
write(0x01,donja);  // ovdje će bit neki konkretni brojevi umjesto varijabli
write(0x02,gornja);
//****************************
void funkcija_tajmera (){
    brojac=read(0x03);
    if (smjer){
        if(brojac==gornja) brojac=donja;
        brojac++;
        write(0x03,brojac);
        PORTB=brojac;
    } else if(!smjer) {
        if(brojac==donja) brojac=gornja;
        brojac--;
        write(0x03,brojac);
        PORTB=brojac;
    }
}
//****************************

void main(void){
// Na PORTB ce biti ispisivane vrijednosti brojaca
    TRISB=0x00;
    ANSELB=0x00;
    LATB=0x00;
    PORTB=0x00;

    smjer = read(0x00);
    donja = read(0x01);
    gornja = read(0x02);

if(smjer) brojac=donja;  //ako je smjer=1 broji unaprijed
else brojac=gornja;
write(0x03,brojac);

    while(1) {
        Time (); // ovdje će bit neka funkcija koja će svake sekunde uvećavati brojac

    }
}