error: 'class Stream' has no member named 'flush' with MightyCore on Atmel 1284p

Projects Programming
1

Hi all,

I've got some code running under Uno, but I need it running on the Atmel 1284p with MightyCore. I'm using the latest version of MightyCore from here.

Code compiles and runs fine as mentioned on the Uno, and also compiles okay for Mega. But when I change the board to the 1284p which is the chip I'm using it gives the following error.

In file included from /Volumes/Users/tsarath/Documents/My Gear/Arduino/Sketch_Files/libraries/Blynk/src/BlynkSimpleStream.h:18:0,
                 from /Volumes/Users/tsarath/Documents/My Gear/Arduino/Sketch_Files/WeatherBase_v15/WeatherBase_v15.ino:28:
/Volumes/Users/tsarath/Documents/My Gear/Arduino/Sketch_Files/libraries/Blynk/src/Adapters/BlynkSerial.h: In member function 'bool BlynkTransportStream::connect()':
/Volumes/Users/tsarath/Documents/My Gear/Arduino/Sketch_Files/libraries/Blynk/src/Adapters/BlynkSerial.h:37:17: error: 'class Stream' has no member named 'flush'
         stream->flush(); 
                 ^~~~~
exit status 1
Error compiling for board ATmega1284.

BlynkSerial.h:37 has the following code line

   bool connect() {
        BLYNK_LOG1(BLYNK_F("Connecting..."));
        stream->flush();  // <---Compile error on the 1284p
        return conn = true;
    }

Commenting the offending line out results in successful compilation but of course the resulting function does not work.

Given the function works on the standard Arduino board cores, only thing I can think of is that Stream.cpp in MightyCore has not implemented the flush() function.

Any thoughts on how I can either work around this or substitute flush() in some other way?

It's safe to say I'm way over my head on this issue and would greatly appreciate your help. :o

Many thanks in advance

2

Other than, trying to see if you can get it to work using Mega with 1284p as a processor, i can offer no advice.

3

It is an error in the MCUDude's cores. class Print is missing flush().

I use a 1284p board with arduino avr package and a custom board variant

4

Juraj:
It is an error in the MCUDude's cores. class Print is missing flush().

I use a 1284p board with arduino avr package and a custom board variant
my_boards/README.MD at master · JAndrassy/my_boards · GitHub

Thanks, I was actually able to get my code working without the use of flush() by commenting this line out. The code was failing elsewhere originally which I misread for this error.

connect() returns true after flush(), so now it just returns true without flush(). Hopefully no serious issues further down the line...

5

Deva_Rishi:
Other than, trying to see if you can get it to work using Mega with 1284p as a processor, i can offer no advice.

The price of beating a new path... :-\