I2C Joystick Unit (MEGA328P)

Description

JOYSTICK, we have two types of JOYSTICKs one is build on a panle compatible with FACES Kit, this is the M5Unit version of JOYSTICK

JOYSTICK is very similar to the 'analog' joystick on PS2 (PlayStation 2) controllers. The X and Y axes are two 10k potentiometers which control 2D movement by generating analog signals. The joystick also has a push button that could be used for special applications. Therefore, the entire Unit can output X-Y motion signals in both directions and Z direction.

As designed in the schematic, the Joystick X dimension is connected to pin A0 of MEGA328, the Joystick Y dimension is connected to pin A1 on MEGA328, the Joystick Z dimension is connected to pin A2 on MEGA328.

This Unit communicates with the M5Core via the GROVE A interface. It's I2C address is 0x52. By reading the data transferred from JOSTICK, you can obtain the motion information of JOYSTICK.

Product Features

• Output value of X, Y direction: 10 ~ 250
• Output value of Z direction is (0: released; 1: pressed)
• Software Development Platform : Arduino, UIFlow(Blockly, Python)
• Two Lego-compatible holes

Kit includes

• 1x JOYSTICK Unit
• 1x Grove Cable

Application

• Game Controller
• Robot remote control

Learn

Example

1. Arduino IDE

The code below is incomplete(just for usage). To get complete code, please click here.

#include <M5Stack.h> #include "Wire.h"  #define JOY_ADDR 0x52  // declaration uint8_t x_data, y_data, button_data; char data[100];  // initialization M5.begin(); M5.Lcd.clear(); dacWrite(25, 0);//disable the speak noise Wire.begin(21, 22, 400000);   // read data Wire.requestFrom(JOY_ADDR, 3); if (Wire.available()) {   x_data = Wire.read();// X(range: 10~250)   y_data = Wire.read();// Y(range: 10~250)   button_data = Wire.read();// Z(0: released 1: pressed)   sprintf(data, "x:%d y:%d button:%d\n", x_data, y_data, button_data); } 

2. UIFlow

To get complete code, please click here.

More information

Schematic

PinMap