I have a school assignment where I have to write my own library to work with the lcd. How can I start doing this, without using LiquidCrystal library from Arduino?
The best solution to do it, is to download a standard library as "template".
You can download this one and edit it, or create the same files:
https://github.com/arduino-libraries/LiquidCrystal
What you need is:
keywords.txt
library.properties
source folder
optional: example folder
Then you just need to put your library-class (a .h and a .cpp) files inside the source folder.
Once you copy the entire folder in the Arduino library folder (UserData/Arduino/Libraries/), the IDE will find it automatically. You just need to include the header file of your new project (or example project).
I would like to know if it is possible to use selective arduino libraries in our AVR projects. For Example: I am using Atmega328 and Atmel studio. I would like to use DS1307 related library file(twi.c and Wire.c source files I guess) in my project. Can we use individual libraries and then include applicable header files in our build? If so where are these libraries located and what is the extension? I saw few articles on building entire arduino project in Atmel studio and I am not interested in that. I want to manage without installing arduino if possible (I can install arduino only to get library if needed). I thought of including source files, but they are in C++ and I started getting error messages when included in C project. Is it possible to do without modifying the source files much?
After searching, i found that
Any 5V microcontroller with I2C built-in can easily use the DS1307.
check also first lines here.
I look quickly at DS1307.c and found it is not using any functions from wire.c
But instead of all that you could get source code for DS1307.c and implement any function begin with i2c by yourself and small modifications for interrupt functions. and you can use it in your code. i downloaded the library from this link.
There are a lot of twi/i2c libraries for avr, you could download most suitable one and rename it's function like the function called from DS1307.c
In the Arduino GUI on windows, if I click on Sketch --> Import Library, at the bottom of the menu there is a section called "Contributed".
Unfortunately, I had misclicked and added a library I did not want to that list.
How can I remove it from that list?
The help page only mentions that "If a sketch no longer needs a library, simply delete its #include statements from the top of your code" but it does not mention how to remove the library from the list of contributed libraries.
Go to your Arduino documents directory; inside you will find a directory named "Libraries". The imported library directory will be there. Just delete it and restart the Arduino app.
Your Arduino library folder should look like this (on Windows):
My Documents\Arduino\libraries\ArduinoParty\ArduinoParty.cpp
My Documents\Arduino\libraries\ArduinoParty\ArduinoParty.h
My Documents\Arduino\libraries\ArduinoParty\examples
....
or like this (on Mac and Linux):
Documents/Arduino/libraries/ArduinoParty/ArduinoParty.cpp
Documents/Arduino/libraries/ArduinoParty/ArduinoParty.h
Documents/Arduino/libraries/ArduinoParty/examples
The only issue with unused libraries is the trivial amount of disk space they use. They aren't loaded automatically so don't take up any application memory of the Arduino IDE.
Quote from official documentation as of August 2013:
User-created libraries as of version 0017 go in a subdirectory of your default sketch directory. For example, on OSX, the new directory would be ~/Documents/Arduino/libraries/. On Windows, it would be My Documents\Arduino\libraries\. To add your own library, create a new directory in the libraries directory with the name of your library. The folder should contain a C or C++ file with your code and a header file with your function and variable declarations. It will then appear in the Sketch | Import Library menu in the Arduino IDE.
To remove a library, stop the Arduino IDE and remove the library directory from the aforementioned location.
The answer is only valid if you have not changed the "Sketchbook Location" field in Preferences. So, first, you need to open the Arduino IDE and go to the menu
"File -> Preferences"
In the dialog, look at the field "Sketchbook Location" and open the corresponding folder.
The "libraries" folder in inside.
I have found that from version 1.8.4 on, the libraries can be found in ~/Arduino/Libraries. Hope this helps anyone else.
I had to look for them in C:\Users\Dell\AppData\Local\Arduino15\
I had to take help from the "date created" and "date modified" attributes to identify which libraries to delete.
But the names still show in the IDE... But it is something I can live with for now.
For others who are looking to remove a built-in library, the route is to get into PackageContents -> Java -> libraries.
BUT : IT MAKES NO SENSE TO ELIMINATE LIBRARIES inside the app, they don't take space, don't have any influence on performance, and if you don't know what you are doing, you can harm the program.
I did it because Arduino told me about libraries to update, showing then a board I don't have, and when saying ok it wanted to install a lot of new dependencies - I just felt forced to something I don't want, so I deinstalled that board.
In Elegoo Super Starter Kit, Part 2, Lesson 2.12, IR Receiver Module, I hit the problem that the lesson's IRremote library has a hard conflict with the built-in Arduino RobotIRremote library. I am using the Win10 IDE App, and it was non-trivial to "move the RobotIRremote" folder like the pre-Win10 instructions said. The built-in Libraries are saved at a path like: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\libraries
You won't be able to see WindowsApps unless you show hidden files, and you can't do anything in that folder structure until you are the owner. Carefully follow these directions to make that happen: https://www.youtube.com/watch?v=PmrOzBDZTzw
After hours of frustration, the process above finally resulted in success for me. Elegoo gets an F+ for modern instructions on this lesson.
as of 1.8.X IDE
C:\Users***\Documents\Arduino\Libraries\
My solution is low-tech but effective so I want to share:
create a folder for disabled libraries next to libraries
move libraries here to disable, swap back in to re-enable
I am new in Qt framework and now, I want to create an app which supports multi-language display. I known there is a way to do: Qt Linguist. I searched, and archieved some information about lupdate, lrelease ... But I just have Qt Creator IDE, how can I run or compile lupdate, lrelease ???
How can I create *.ts file ?
Please give me some code example or guide to do. (I often use Qt Designer to create GUI)
As far as i know, there is no option in QtCreator to use QtLinguist - you have to do it manually. Here you have an excellent documentation about how to do it. I have learned from there also.
I've attempted this myself by compiling the Arduino libraries into their own standalone library and linking to a project in Eclipse, but have had a couple of issues along the way.
Is there a decent guide on how to get this up and running? I've been hard pressed to find one online that actually works... The arduino.cc guide has a couple of flaws in, and troubleshooting drove me insane.
I'm on Mac OS X 10.5 with an Uno board.
Edit: Might be worth noting that most Arduino C guides don't specify the baud rate necessary, just the MCLK frequency (16 MHz). Make sure you've changed this or AVRDude won't understand how to flash your IC.
Other people have had some success using the guide Using Eclipse with Arduino Duemilanove.
Arduino will not work in pure C setup as it requires a C++ compiler. However if you want to include arduino core and other libraries inside your project then read on. Here we can see how to use Arduino Ethernet Library with our code.
STEP BY STEP GUIDE
Get Arduino cores and variants/ files.
Get relevant library, e.g. Arduino Ethernet library
The directory structure is
/
lib/arduino/cores
lib/arduino/variants//pins_arduino.h
lib/arduino/makefile
lib/arduino/build
lib/
The sample make file can be downloaded from:
https://gist.github.com/rjha/b7cda6312552c3e15486
First create Arduino core as a static library. To do so:
$cd to lib/arduino folder
$ make clean
$ make lib
This will create lib/arduino/build/libarduino.a static library file.
Next we goto main project Makefile. There we can define any Arduino library,e.g. Arduino SPI or Arduino Ethernet as a make target that compiles against Arduino core library.
Inside our own make target, we can include Arduino Target that in turns include Arduino core.
For (7) and (8) example, see this gist
https://gist.github.com/rjha/e7b123d3dc4346b5830c
(9) when creating Hex and general linking, link using -larduino and keep the libarduino.a in the search PATH. #see above Gist for an example.
(10) Using this structure you can use any Arduino libraries inside your own code.
Most of the Arduino libraries are a mess dependencies wise and the code quality is also poor. The only benefit is that you can get some ready made libraries to link against your code.