Cannot use HardwareSerial pointers or references in my Lib for Arduino AVR?

Question

I wrote a wrapper class for a serial lcd screen for 4dulcd - and i want to be able to pass which serial i am using to communicate with it

I have these in my code myClass.h

#include <HardwareSerial.h>
public:
uint8_t Init(long BaudRate, HardwareSerial *serial);
private:
HardwareSerial *_HardSerial;

in myClass.cpp

uint8_t myClass::Init(long BaudRate, HardwareSerial *serial){
_HardSerial(serial);
...
}

In my sketch

#include <myClass.h> 
myClass lcd; 
void setup()
{
 Serial1.begin(9600); // <- Error here?!
 //lcd.Init(115000,&Serial1);
...

So the error is

sketch_sep17a.cpp: In function 'void setup()': sketch_sep17a:16: error: 'Serial1' was not declared in this scope

If i remove the myClass.h header than the Serial1 works... i Include it and it throws this error that makes no sense to-

I tried to include the hardwareserial in my sketch and make an instance of it but it requires all sorts of construction properties that i have no idea what they mean. And i would not even want to release my lib to do this as it is inconvenient for the normal end user.

I tried both references and pointers- same error.

Can any body help?

Answer 1

I might be missing something here, but where is Serial1 instantiated?

If there is no Serial1 object created then unless the begin function is static it won't work.

• Piotr Kula: Serial1 is auto instantiated in the Harwarewareserial.cpp ... which by default is loaded in the Arduino IDE. somehow by including the hwserial.h header in my Lib-- it no longer knows what Serial1 is anymore..?but it should..