[ecfisa]

Hola mizzard.

Te pongo un ejemplo:

unsigned char v[100];
unsigned short int i= 0, n= 1023;

  if (n < 256){
    v[i++] = 0;
    v[i++] = n;
  }
  else {
    v[i++] = n & 0xFF;
    v[i++] = n >> 8;
  };

Pero utilizando unsigned char y unsigned short int y no char e int por que, char: 8bits (-128 a 127) e int: 32 bits (-2,147,483,648 a 2,147,483,647)

Un saludo.