AVR new libraries don't compile

[taha-ub2]

Hi every one I am trying to use trampoline with Arduino, but when it comes to add new libraries such as LiquidCrystal_I2C or servo it doesn't compile
if any one can help please

[dapperfu]

"It doesn't compile" is a very broad error.

1. What is the error message?
2. What have you tried so far?

[mbriday]

Hi, Can you give me more details about the compilation problem? regards

[taha-ub2]

Hi, the problem is that I try to make a task that displays data from sensors for the first time I want just to test the LCD so for that I have to add the LiquidCrystal_I2C library, for that I modified the config.oil as mentioned but it tells me I need a Wire.h file when i added Wire.h into the library folder here Iput a zip file with oil and cpp files and screenshots on the errors I got lcd.zip

[mbriday]

Hi, Ok, received. I will look at that asap.

[mbriday]

Hi,

I tried your code. In fact, you try to insert a new library, but it depends on i2c (Wire). So you just have to set it in your project:

   LIBRARY = lcd_i2c;
   LIBRARY = i2c;

Another way is to define the dependency directly in the config.oil:

  LIBRARY lcd_i2c {
    NEEDS   = i2c;
    PATH    = "/avr/arduino/libraries/LiquidCrystal_I2C-1.1.2";
    CPPFILE = "LiquidCrystal_I2C.cpp";
  };

This is the preferred approach, as i2c will be added automatically. I have updated the README.md in example/avr to add the information about the NEED parameter.

There is still a problem, with a conflict with the write() function. I look for this pb. Maybe the arduino version in Trampoline should be updated.

regards,

Note: In your example, you just have one task, that is not AUTOSTART and will never be activated.

[mbriday]

in the library header file, there is the following code:

#if defined(ARDUINO) && ARDUINO >= 100
  virtual size_t write(uint8_t);
#else
  virtual void write(uint8_t);
#endif

So, you have to define the ARDUINO definition. You can add C/C++ flags in the BUILD section of your .oil file:

      APP_SRC     = "lcd.cpp";
      CFLAGS      = "-DARDUINO=10809";
      CPPFLAGS    = "-DARDUINO=10809";
      CPPCOMPILER = "avr-g++";

And it just works :) (in fact, it compiles, I have no i2c based lcd here)

Note: I have updated the arduino submodule, you can update.

[taha-ub2]

Hi Mr mbriday I have done exactly as you said but still have a problem thank you very much for your help

[mbriday]

This is a link problem. Print::print is not found. It is defined in Print.cpp. It is added in the serial lib. It just made an update to split serial in print and serial. Make an update and declare your library as:

  LIBRARY lcd_i2c {
    NEEDS   = i2c;
    NEEDS   = print;
    PATH    = "/avr/arduino/libraries/LiquidCrystal_I2C-1.1.2";
    CPPFILE = "LiquidCrystal_I2C.cpp";
  };

In my working example, I had serial declared. regards,

[taha-ub2]

Hi Mr Mikael first I am very grateful it finally worked

LIBRARY lcd_i2c { NEEDS = i2c; NEEDS = serial; // here i did serial instead of print PATH = "/avr/arduino/libraries/LiquidCrystal_I2C-1.1.2"; CPPFILE = "LiquidCrystal_I2C.cpp"; }; and in the cpp file I have to include LiquidCrystal_I2C.h I wish if I could just add libraries on the build and not modify the cpp files. thank you very much best regards.

[mbriday]

I didn't have to modify the library sources, but I don't think it is a Trampoline related problem anymore. Regards,