How to access Serial or SerialUSB dependent upon a variable? [solved]

Using Arduino Programming Questions
1

Hello all,

I don't claim to be proficient at C++ or classes but I want to implement something like this :-

int serial;
int initserial(int x)
{
if(!x)
{
serial=Serial;
}
else
{
serial=SerialUSB;
}
return serial;
}

void setup()
{
initserial(0);
serial.begin (115200);
while(!serial);
serial.println ();
serial.println ();
}

Obviously this gives 100's of errors but could someone point me in the right direction please?

Thankyou.

2

Hello,

Use type HardwareSerial

Edit: What is SerialUSB?

3

Perhaps you want this:

#ifdef __SAM3X8E__
#define SERIAL SerialUSB
#else
#define SERIAL Serial
#endif
...

setup()
  SERIAL.begin(); 
  while (!SERIAL) {}
  SERIAL.println("Hello");

The above doesn't use a variable, and is faster. If you really want a variable, then

Stream *stream;

setup()
{
  if (flag)
    stream = &SerialUSB;
  else
    stream = &Serial;
  stream->println("Hello");
 ...
4

Pass a class derived from Stream by reference:

class myMenu 
  {
  private:
    Stream & port_; 
  public:
    myMenu (Stream & port) : port_ (port) { }
    void begin ();
  };

void myMenu::begin ()
  {
  port_.println ("Menu initialized."); 
  }

myMenu menu (Serial);

void setup ()
  {
  Serial.begin (115200);
  menu.begin ();
  }  // end of setup

void loop () { }