As an output, it can drive an actuator like an LED. When configured as an input, a pin can detect the state of a sensor like a pushbutton this is discussed in a later tutorial. To use it, you pass it the number of the pin to configure and the constant INPUT or OUTPUT.
Mac sketch read mac#
Today, Sketch is a design platform combining the Mac editor, built using native macOS. When it comes to design apps on the Mac, the simplicity and focus of Sketch made it an industry standard and set an example for countless others. The pinMode() function configures a pin as either an input or an output. Sketch is a macOS-native design app featuring excellent tools for vector editing, UI design and collaboration. These parameters are used by the pinMode() function to decide which pin and mode to set. For example, the line pinMode(ledPin, OUTPUT) calls the pinMode() function, passing it two parameters: ledPin and OUTPUT. You can call a function that's already been defined (either in your sketch or as part of the Arduino language).
Mac sketch read code#
The code between the is called the body of the function: what the function does.
The text before and after the name specify its return type and parameters: these will be explained later. The first line provides information about the function, like its name, "setup". For example, here's the definition of the setup() function from the Blink example: There's more information in the Variables tutorial.Ī function (otherwise known as a procedure or sub-routine) is a named piece of code that can be used from elsewhere in a sketch. For example, you could store the value read from an input into a variable. Often, however, the value of a variable will change while the sketch runs. The advantage of using a variable is that it's easier to move the LED to a different pin: you only need to edit the one line that assigns the initial value to the variable. In this case, the person writing the program could have chosen not to bother creating the ledPin variable and instead have simply written 13 everywhere they needed to specify a pin number.
Every time the name ledPin appears in the code, its value will be retrieved. It's being used to indicate which Arduino pin the LED is connected to. For example, the line from the Blink sketch above declares a variable with the name ledPin, the type int, and an initial value of 13. The message "LED connected to digital pin 13" is a comment.Ī variable is a place for storing a piece of data.
0 kommentar(er)
