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How to use evive’s Joystick (Navigation Key)

How to use evive’s Joystick (Navigation Key)

About This Tutorial

This tutorial discusses how to work with evive’s 5-way navigation key and how to read its state and display on the TFT screen with the help of an Arduino IDE sketch.

Tutorial Info

Programming Platform: Arduino IDE
Difficulty: Intermediate
Estimated Time: 2 Hrs
Arduino, TFT DIsplay, Navigation Key

Components Required

Image	Component	Quantity	Available in Kit
	evive	1	evive
	USB A-B Cable	1	evive

Introduction

evive has an inbuilt 5-way navigation key, which is used to navigate through evive menu based system. The navigational key has 4 directions:

Left
Right
Up
Down.

This information is provided by the analog pin A11.

The 5th direction is centre-press. The centre switch is connected to the digital pin 19 in active HIGH mode. This means that if the switch is pressed, then pin 19 is HIGH; otherwise the pin is LOW.

The table below shows the values for their corresponding directions:

DIRECTION	ANALOG VALUE RANGE
Up	205-215
Right	405-415
Down	605-615
Left	835-845

Example

In this example we will read the state of the 5-way navigation key and display it on the TFT Screen.

Below is the Arduino sketch:

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