Applications of Embe ...

 #include <main.h> // the file main.h with the

                             // initial settings is included

                             // This file must be placed in the same

                             // folder with the project

                             // Also the 18F4550.h file must exist

                             // in the same folder with the project

#byte PORTD =0xF83 // We attribute to the memory position 0xF83

                                 // the name PORTD

                                 // This means that we define a 8 bit

                                 // variable whose value will be stored

                                 // to the memory position F83h

                                 // The memory position F83h is the PORTD

                                 // data register

void init(void);

void ext_int1(void);

void main(){

   init();           //initialization routine

   while(TRUE){;}    //the main program does nothing

}

void init(){

   set_tris_d(0x00);        //PORTD is defined as output                                               

   PORTD = 0b00000000;      //The PORTD data register is given the value 0

   ext_int_edge(1, L_TO_H); //Activation of the interrupt from RB1

                            //during the transition from 0 to 1 (raising edge)

   enable_interrupts(GLOBAL);    //Enable global interrupts

   enable_interrupts(INT_EXT1);  //Enable external interrupt by RB1

}

#INT_EXT1 HIGH    //External interrupt by RB1

void ext_int1(){

   int i;

   for(i=1;i<3; i++){      //performed twice

      output_high(PIN_D7); //LED is on

      delay_ms(200);       //wait for 0.2s

      output_low(PIN_D7);  //LED is of

      delay_ms(200);       //wait for 0.2s

   }