PIC18F4550 Programming Using MPLabX

PIC18F4550 is an enhanced Flash micro-controller with USB 2.0 feature. This device can operate up to 48MHz that yield the executing speed up to 12MIPS.

PIC18F4550 Family Data Summary

Program testing on target board

 There are some compilers available to program this device,

• MPLABX XC8
• MikroC Pro for PIC
• IAR for PIC18
• CCS PICC, and etc.

MPLABX XC8 is a free compiler from this device manufacturer. We can buy a paid version for a higher code generation quality.

In this example I use the MPLABX IDE to get start with this device programming. I use the latest version of MPLABX of 6.0, and the XC8 compiler of 2.40.

The program will chase the output LED(s) connect to PORTD.

Schematic

Source Code:

/*
 * File:   main.c
 * Author: aki-technical
 *
 * Created on August 1, 2022, 6:22 PM
 */
 
#include <xc.h>
#include "config18f4550.h"
 
#define _XTAL_FREQ 20000000
 
void main(void) {
    PORTD=0x00;
    LATD=0x00;
    TRISD=0x00;
    LATD=0x01;
    while(1){               
        LATD=0x01;
        while(LATD!=0){
            LATD<<=1;
            __delay_ms(50);
        }                  
    }
    return;
}
 

Configuration File:

// CONFIG1L
#pragma config PLLDIV = 1       
#pragma config CPUDIV = OSC1_PLL2
#pragma config USBDIV = 1       
 
// CONFIG1H
#pragma config FOSC = HS 
#pragma config FCMEN = OFF      
#pragma config IESO = OFF       
// CONFIG2L
#pragma config PWRT = OFF       
#pragma config BOR = OFF        
#pragma config BORV = 3         
#pragma config VREGEN = OFF     
 
// CONFIG2H
#pragma config WDT = OFF        
#pragma config WDTPS = 32768    
 
// CONFIG3H
#pragma config CCP2MX = OFF     
#pragma config PBADEN = OFF     
#pragma config LPT1OSC = OFF    
#pragma config MCLRE = ON      
 
// CONFIG4L
#pragma config STVREN = OFF     
#pragma config LVP = OFF        
#pragma config ICPRT = OFF      
#pragma config XINST = OFF      
 
// CONFIG5L
#pragma config CP0 = OFF        
#pragma config CP1 = OFF        
#pragma config CP2 = OFF        
#pragma config CP3 = OFF        
 
// CONFIG5H
#pragma config CPB = OFF        
#pragma config CPD = OFF        
 
// CONFIG6L
#pragma config WRT0 = OFF       
#pragma config WRT1 = OFF       
#pragma config WRT2 = OFF       
#pragma config WRT3 = OFF       
 
// CONFIG6H
#pragma config WRTC = OFF       
#pragma config WRTB = OFF       
#pragma config WRTD = OFF       
 
// CONFIG7L
#pragma config EBTR0 = OFF      
#pragma config EBTR1 = OFF      
#pragma config EBTR2 = OFF      
#pragma config EBTR3 = OFF      
 
// CONFIG7H
#pragma config EBTRB = OFF      
 

Click here to download its source file. I use Protues 8.10 SP3 to simulate this program. Now let try an random LED output on PORTD.

/*
 * File:   main.c
 * Author: aki-technical
 *
 * Created on August 1, 2022, 6:22 PM
 */
 
#include <xc.h>
#include "config18f4550.h"
 
#define _XTAL_FREQ 20000000
 
void main(void) {
    PORTD=0x00;
    LATD=0x00;
    TRISD=0x00;
    LATD=0x01;
    while(1){          
        LATD=rand();
        __delay_ms(50);
    }
    return;
}
 

The schematic diagram remains the same as the previous one's.