They are similar to a variable, as in they are a container to hold a value, but they don't change the content later in the code. Next come three lines that start with const. So if you want to include capacitive sensing on the Touch Board you need these three lines. The Wire.h library is to include the I2C communication we mentioned above. So by including the MPR121.h library, we are including the Touch Board's capacitive electrodes. The MPR121_Datastream.h library is an additional library for the MPR121 in order to send data to the computer. You can view a library as a pre-written code that doesn't need to be changed, but is instead used as a building block for the code. This is used in order to include libraries of code that is used by the Touch Board. With these you can quickly change the value of a variable and do computations. If boolean_variable_1 is false write out "boolean_variable_1 is false"".Īnother useful tools are for statements. You can read this if statement as "if boolean_variable_1 is true, write out "Proceed to the next step of code" and compute a + b and store it in x. These are very useful for if statements again, for example 0, 1, 10, 14, and so on (a, b and x are integers in our example). Another data type we use in our code a lot are booleans, which can take the value "true" or "false", for example
#How to write c code for density map full#
There are different types of variables some common data types are integers, which are full numbers, e.g. If we change the value of either a or b, for example a = 3, then x wouldn't be equal to 5 anymore and our if statement would output "x is not equal to 5". We know that x is equal to 5, because x = a + b = 2 + 3 = 5. Here we are checking if x is equal to 5 and if it is true, then we write out "x is equal to 5". And this is also where variables play an important role.
The idea is simple: "if a condition is true, then the following happens else, something else happens". In order to register events in code, programmers like to use if statements. You can use these variables to do computations, for exampleĪnd the result would be that the variable x = 5. Where a and b are variables that contain a number. A variable can be seen as a container that can have different values, for example
The fundamentals of programming are variables. If you have programmed before, you can skip to the next part. If you have never programmed before, continue reading below as we'll give you a crash course in programming that you can follow along on your Touch Board. This is not a comprehensive introduction into coding, for this we would recommend checking out Arduino's learning resources. In this tutorial we're going to break down the code and explain how the code works. But if you want to write your own code there are some things to consider. We provide a range of sample codes for the Touch Board that you can simply upload to the board.
#How to write c code for density map how to#
The Touch Board can be easily reprogrammed with the Arduino IDE and in this tutorial, we'll walk you through how the code works and how to write your own code!
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