lab1.c

PICC 16X Code for study and learning

/****************************************************************
*			Hi-Tech workshop exercise Lab1						*
*****************************************************************
* The program will display a binary count value on PORTD (LED)	*
* every delay 200mS												*
*																*
*   Files required:												*
*																*		
*                   lab1.c										*
*                   cnfig877a.h (Set the Configuration Word)	*
*																*
*                   pic.h        (Hi-Tech file)					*
*																*
*****************************************************************
*																*
*   Notes:														*
*																*
*   Device Fosc -> 16.00MHz (Clock supplied by target)			*
*																*	
*****************************************************************/

#include <pic.h>				// processor if/def file
#include "cnfig877a.h"

//**********************************
//* Function Prototype Declaration
//**********************************
void Init_System(void);
void Delay_x_mS(int);
void Delay_1mS(void);

// ================================================================
// **** Establish PIC16F877A Configuration Word
// **** == HS Oscillator Mode
// **** == Brown-Out Detect Enabled
// **** == Watch-Dog Timer Off
// **** == Code Protect Off
// **** == Low Voltage Programming Off
// **** == ICD2 Debug Mode On

__CONFIG  ( HS_OSC & BODEN_ON & WDT_OFF & CP_OFF & LVP_OFF & DEBUG_ON ); 

// =================================================================

/*****************************
    INITIALIZE SYSTEM
*****************************/

void Init_System(void)
{
	PORTD = 0x00;				// Initialize PORTD latch states
	TRISD = 0x00;				// set PORTD as outputs
};

//*********************************
//*    Delay Routine with 16MHz
//*********************************

void Delay_x_mS( int N_mS )
{
		int	Loop_mS ;
		
		for ( Loop_mS = 0 ; Loop_mS < N_mS ; Loop_mS++ ) 
		{
			Delay_1mS();		
		}
		 
}

//*** Delay 1mS with 16MHz crystal

void Delay_1mS(void)
{
		int Del_1mS;

		for (Del_1mS = 0 ; Del_1mS < 199 ; Del_1mS ++ )
		{
			asm("nop");
			asm("nop");
		}
}
	
/*******************************************************************
                  MAIN PROGRAM BEGINS HERE
********************************************************************/

void main( void )
{
	Init_System();				// Initialize System Function and Variables

	while(1)  					// Infinite loop
	{
		Delay_x_mS(200);		// Delay 200mS
		PORTD++;				// Increment PortD
	};
}