//******************************************************************************
//Software License Agreement                                         
//                                                                    
//The software supplied herewith by Microchip Technology             
//Incorporated (the "Company") is intended and supplied to you, the  
//Company’s customer, for use solely and exclusively on Microchip    
//products. The software is owned by the Company and/or its supplier,
//and is protected under applicable copyright laws. All rights are   
//reserved. Any use in violation of the foregoing restrictions may   
//subject the user to criminal sanctions under applicable laws, as   
//well as to civil liability for the breach of the terms and         
//conditions of this license.                                        
//                                                                    
//THIS SOFTWARE IS PROVIDED IN AN "AS IS" CONDITION. NO WARRANTIES,  
//WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED  
//TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A       
//PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,  
//IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR         
//CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.       
// *******************************************************************
// PICkit 2 PIC18F4520 Lesson 3 - Rotate LED
//
// This lesson lights LEDs 0-7 in sequence, one at a time.
//
// *******************************************************************
// *    See included documentation for Lesson instructions           *
// *******************************************************************

/** C O N F I G U R A T I O N   B I T S ******************************/

#pragma config FOSC = INTIO67, FCMEN = OFF, IESO = OFF                       // CONFIG1H
#pragma config PWRT = OFF, BOREN = SBORDIS, BORV = 30                        // CONFIG2L
#pragma config WDTEN = OFF, WDTPS = 32768                                     // CONFIG2H
#pragma config MCLRE = OFF, LPT1OSC = OFF, PBADEN = ON, CCP2MX = PORTC       // CONFIG3H
#pragma config STVREN = ON, LVP = OFF, XINST = OFF                          // CONFIG4L
#pragma config CP0 = OFF, CP1 = OFF, CP2 = OFF, CP3 = OFF                   // CONFIG5L
#pragma config CPB = OFF, CPD = OFF                                         // CONFIG5H
#pragma config WRT0 = OFF, WRT1 = OFF, WRT2 = OFF, WRT3 = OFF               // CONFIG6L
#pragma config WRTB = OFF, WRTC = OFF, WRTD = OFF                           // CONFIG6H
#pragma config EBTR0 = OFF, EBTR1 = OFF, EBTR2 = OFF, EBTR3 = OFF           // CONFIG7L
#pragma config EBTRB = OFF                                                  // CONFIG7H


/** I N C L U D E S **************************************************/
#include "p18f46k20.h"
#include "delays.h"

/** V A R I A B L E S *************************************************/
#pragma udata // declare statically allocated uninitialized variables
unsigned char LED_Number;  // 8-bit variable

/** D E C L A R A T I O N S *******************************************/
// declare constant data in program memory starting at address 0x180
#pragma romdata Lesson3_Table = 0x180 
const rom unsigned char LED_LookupTable[8] = {0x01, 0x02, 0x04, 0x08,
												 0x10, 0x20, 0x40, 0x80};

#pragma code    // declare executable instructions

void main (void)
{
    LED_Number = 0;            // initialize

    TRISD = 0b00000000;     	// PORTD bits 7:0 are all outputs (0)

    while (1)
    {
		// use lookup table to output one LED on based on LED_Number value
        LATD = LED_LookupTable[LED_Number];    

        LED_Number++;      // rotate display by 1

        if (LED_Number == 8)
            LED_Number = 0;    // go back to LED 0.

        Delay1KTCYx(50);	    // Delay 50 x 1000 = 50,000 cycles; 200ms @ 1MHz
    }	
}