//******************************************************************************************
//  PIC18F14K50 Sample Program
//   Project      :
//   Program Name :
//   Programer    :
//   Create date  :  Version 1.0    H22.07.10
//   History      :
//   Laungage     :  MPLAB C18 
//******************************************************************************************
//  (1)Description
//
//******************************************************************************************
#include	<p18f14k50.h>
#include	<stdio.h>
#include	<string.h>
#include	<stdlib.h>
#include	<math.h>
#include	<ctype.h>
#include	<io.h>
#include	<adc.h>
//
//Define configration
//
#pragma config CPUDIV=NOCLKDIV //CPU System Clock Selection bit(No CPU System Clock divide)
#pragma config USBDIV = OFF //USB Clock Selection bit(USB Clock comes directly from the OSC1/OSC2 oscillator block; no divide)
#pragma config FOSC = HS //Oscillator Selection bits(HS oscillator)
#pragma config PLLEN = ON //X PLL Enable bit(Oscillator multiplied by 4)
#pragma config PCLKEN = OFF //Primary Clock Enable Bit(Primary clock is under software control)
#pragma config FCMEN = OFF
#pragma config IESO = OFF //Internal/External Oscillator Switchover bit(Oscillator Switchover mode disabled)
#pragma config PWRTEN = OFF,BOREN = OFF,BORV = 19
#pragma config WDTEN = OFF,WDTPS = 1
#pragma config MCLRE = OFF //MCLR Pin Enable bit(RE3 input pin enabled; MCLR disabled)
#pragma config HFOFST = OFF,STVREN = OFF,LVP = OFF,BBSIZ = OFF,XINST = OFF
#pragma config CP0 = OFF,CP1 = OFF,CPB = OFF,CPD = OFF,WRT0 = OFF,WRT1 = OFF,WRTB = OFF,WRTC = OFF,WRTD = OFF,EBTR0 = OFF,EBTR1 = OFF,EBTRB = OFF
//
//Define function
//
unsigned int chkSW(void);
void mvLED(unsigned char *);
void mvLED2(unsigned char *);
void wat(unsigned int);
//
//Define status
//
#define PI_NORMAL 0
#define PI_RIGHT  1
#define PI_LEFT   2

//******************************************************************************************
//   Program       : 
//   Title         : 
//   Input         :
//   Output        :
//******************************************************************************************
void main(void)
{
unsigned char LEDlst = 0x01;
unsigned int status;

// *****************************
//   1.Initialized Segment
// *****************************
    ANSELH = 0;		//ALL Degital PORT (PORTB)�@
    TRISA = 0xFF;
    TRISB = 0xFF;
    TRISC = 0x00;
    LATC  = 0x00;
    PORTC = 0x00;
// *****************************
//   2.Program main
// *****************************
    while(1){
        status = chkSW();

        if (status== PI_RIGHT){
            mvLED(&LEDlst);
        }else if (status== PI_LEFT){
            mvLED2(&LEDlst);
        }        
        PORTC = LEDlst;
        wat(10);
    };
}

//******************************************************************************************
//   Function Name : mvLED
//   Title         : Move LED function
//   Input         :
//   Output        :
//******************************************************************************************
void mvLED(unsigned char *LEDlst)
{
    if(*LEDlst == 1){
        *LEDlst = 2;
    }else if(*LEDlst > 127){
        *LEDlst = 1;
    }else{
        *LEDlst = *LEDlst * 2;
    }
    return;	
}


//******************************************************************************************
//   Function Name : mvLED2
//   Title         : Move LED function
//   Input         :
//   Output        :
//******************************************************************************************
void mvLED2(unsigned char *LEDlst)
{
    if(*LEDlst <= 1){
        *LEDlst = 0x80;
    }else{
        *LEDlst = *LEDlst / 2;
    }
    return;	
}

//******************************************************************************************
//   Function Name : chkSW
//   Title         : Check Degital Switch
//   Input         :
//   Output        :
//******************************************************************************************
unsigned int chkSW(void)
{
    if((PORTB & 0b10000000) == 0){
        while((PORTB & 0b10100000) != 0b10100000 );
        return(PI_LEFT);
    }else if((PORTB & 0b00100000) == 0){

        while((PORTB & 0b10100000) != 0b10100000 );
        return(PI_RIGHT);
    }else{
        return(PI_NORMAL);
    }
}

//******************************************************************************************
//   Function Name : wat
//   Title         : wait function
//   Input         :
//   Output        :
//******************************************************************************************
void wat(unsigned int tim)
{
    unsigned int lp,lp1 ;
    for(lp=0 ; lp < tim ; lp++ )
        for(lp1=0 ; lp1 < 100 ; lp1++ ) ;            
    return;
}