![]() These sketches are wonderful resources for example code and learning how to write good code under Arduino. There it is! Let’s open the example provided with our new library.Įxamples are the greatest thing about libraries! Good libraries will have well written examples showing how to use the library. If you don’t see the CapacitiveSensor example try closing and re-opening Arduino. Where’s the CapacitiveSensor example? Did you have Arduino open when you copied and pasted the directory? Arduino checks the library directory at startup so if you already have Arduino open, you will need to restart Arduino any time you add to the libraries directory. To verify the library has been installed correctly, open up the Examples folder under the Arduino IDE. If the library you are installing has a funky folder name then this step is the ideal time to clean it up. Arduino will throw an error upon starting up. Note: Arduino does not allow library folders to contain symbols such as hyphens ‘-’. Now copy the new CapacitiveSensor folder to the libraries folder. Open an explorer window and navigate to the libraries folder under My Documents. Here we see the location of the Arduino libraries folder. Under Windows, Arduino stores all the add-on libraries within the My Documents folder. Most will also contain an examples folder. You can use both if you’d like, but, for this example, we will be copying and installing only the CapacitiveSensor folder. This particular library contains libraries for both the basic Arduino and the more advanced Arduino Due. Under Windows, you should be able to double click on the file to open it up. The contents of the Capacitive Sense zip fileįind the zip file on your local computer (wherever downloaded files end up). Navigate to the library’s page and download the zip file. We are going to use the Capacitive Sense library for this example. If you’re more of a text learner then check out the Arduino tutorial on installing libraries. This section covers installing a library under the Windows environment and utilizes quite a few screen shots. ZIP file containing the library of your choice. ZIP Library’ option, which will then allow you to choose a folder or. Library in the Library Manager, Ready to be InstalledĪlternatively, if you have a library of your own you would like to add or a library that hasn’t been added to the Library Manger yet, you can click the ‘Add. When installation finishes, close the Library Manager. Click that button, and the library should install automatically. Click on the desired library, and the ‘Install’ button will appear. To find a library for your product, search for the product name or a keyword such as ‘k type’ or ‘digitizer’, and the library you want should show up. When you open the Library Manager you will find a large list of libraries ready for one-click install. It is found in the ‘Sketch’ menu under ‘Include Library’, ‘Manage Libraries…’ The library manager was added starting with Arduino IDE versions 1.5 and greater (1.6.x). Arduino’s Official Library Instructions.The Arduino website also has great instructions on installing libraries if you need more information. Make sure you have a good understanding of the following concepts before getting any further into this tutorial. This tutorial will show you how to a library in Arduino v1.0.5 but should apply for many past, present, and future versions of Arduino. There are thousands of libraries out there! And luckily it’s pretty easy to install them. Libraries make complex tasks easier so that we can focus on larger projects. M圜apPad.capacitiveSensor() takes care of all the heavy lifting and the senseReading variable contains the value sensed from our capacitive pad. While ( (*rIn & rBit) & (total = CS_Timeout_Millis)Īll that code can be replaced with a much easier to use and understand statement such as: senseReading = m圜apPad.capacitiveSensor(30) *rReg |= rBit // set pin to OUTPUT - pin is now HIGH AND OUTPUT *rOut |= rBit // set receive pin HIGH - turns on pullup set receive pin HIGH briefly to charge up fully While ( !(*rIn & rBit) & (total CS_Timeout_Millis) *rReg |= rBit // set pin to OUTPUT - pin is now LOW AND OUTPUT *rOut &= ~rBit // set receivePin Register low to make sure pullups are off *rReg &= ~rBit // set receivePin to input The CapacitiveSensor library takes care of everything so that we don’t have to write code like this: *sOut &= ~sBit // set Send Pin Register low We can write the code from scratch, or we can stand on the shoulders of great people who are smarter than we are.Ĭapacitive touch sensing is a very popular interface. For example, capacitive sensing takes difficult timing and pulsing of digital pins. Arduino users have written lots of exciting add-ons for Arduino. Arduino libraries take a complex task and boil it down to simple to use functions.
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