#include <p18f4550.h>

//Always include this code, it’s necessary when using a bootloader

extern void _startup (void);
#pragma code _RESET_INTERRUPT_VECTOR = 0x000800
void _reset (void)
{
_asm goto _startup _endasm
}
#pragma code
#pragma code high_vector = 0x000808
void high_ISR (void)
{
}
#pragma code
#pragma code _LOW_INTERRUPT_VECTOR = 0x000818
void low_ISR (void)
{
}
#pragma code

// end of bootloader code



/**************************************** 
   Minimax Startup Code v1.0
 - Use LAT_ for Outputs
 - Use PORT_ for Inputs
 - Use defines to make more readable code 
 ***************************************/

#define LED1  	LATBbits.LATB0					// all instances of LED1 will be replaced by LATBbits.LATB0
								// so the name LED1 can now be used in the code to make it more readable

void main(void)
{
 
 // IO-port directions
 TRISA = 0b11111110; 					       	// Port A Input, A0 Output
 TRISB = 0b11111110; 					       	// Port B Input, B0 Output
 TRISC = 0b11111111; 					       	// Port C Input
 TRISD = 0b11111111; 					       	// Port D Input
 TRISE = 0b11111111; 					       	// Port E Input

 ADCON1 = 0b00001111; 					       	//All ADC disabled

 // set all outputs to 0;
 PORTA = 0;
 PORTB = 0;
 PORTC = 0;
 PORTD = 0;
 PORTE = 0;

 while(1)
 {

  // read multiplexed switches
  LATAbits.LATA0 = 0;                           		// Select active row (active low)
   if (PORTAbits.RA3 == 0) LED1 = 1;				// switch pressed ->  led1 ON
   // read the other colums and do something
  LATAbits.LATA0 = 1;                           		// deselect active row

  // select next row and read the colums

 }

}