C++ on the AVR port Topic is solved

[mikenick42]

Has anyone had any luck with C++ on the AVR port of ChibiOS? I know the STM port can do it but when I try renaming main.c and moving it in the Makefile I get:

Code: Select all

/usr/lib/avr/include/avr/io.h:623:6: warning: #warning "device type not defined" [-Wcpp]
 #    warning "device type not defined"

It looks like __AVR_ATmega328P__ isn't being defined for some reason.

Is it even worth using C++? I'm mainly interested in it because it makes encapsulation more convenient. What I want should be possible if I'm careful about how and where I declare things in C, but is a little cleaner in C++.

[tfAteba]

Hello,

No I have never try to compile AVR code with C++ compiler.

[davidli]

Maybe it only works under windows?

[tfAteba]

Hello Davidli,

No it is not related to OS that you use.

Can yous share me the modification that you made in ChibiOS so that I can try to help.

[tfAteba]

Hello Davidli,

I have take some time to look how to use C++ with AVR MCU.
As I said in this thread https://forum.chibios.org/posting.php?mode=reply&f=35&t=6125,
I have create a demo under demos/AVR/RT-ARDUINO-UNO-G++ to show how we can use C++.

It looks like __AVR_ATmega328P__ isn't being defined for some reason.

It was due to the lac of CPP flags in the rules.mk file that is use to build our sources.

Is it even worth using C++? I'm mainly interested in it because it makes encapsulation more convenient. What I want should be possible if I'm careful about how and where I declare things in C, but is a little cleaner in C++.

You can now use C or C++ .