JOYSTICK 2 CLICK
PID: MIKROE-3711
Weight: 19 g
Joystick 2 Click is a smart navigation key concept based on SKRHABE010 by Alps, a 4-direction
joystick switch with Center-push Function. Alps switches, also known as microswitches, are well
renowned for their reliability and endurance. Joystick switches of this kind are widely used in many
different applications. Joystick 2 click can be used in numerous different applications, as a humanmachine interface device (HMI), such as cell phones, tablets, terminals, video games, toys, and
many more.
Joystick 2 click board™ is supported by a mikroSDK compliant library, which includes functions that
simplify software development. This Click board™ comes as a fully tested product, ready to be used
on a system equipped with the mikroBUS™ socket.
Joystick 2 click includes the SKRHABE010 by Alps, which is the omni directional
joystick switch with center-push function. The mentioned joystick switch have 5 output
pins – each for a single switch direction. With its body height of 1.85mm, it is very easy
to implement it in various designs and thanks to the simple principles of operation, users
have the ability to adapt it in a desired way. Its long-life (of 1 million life cycles)
guarantees the rigidity and durability of the product.
HOW DOES IT WORK?
Joystick 2 click contains a SKRHABE01, a 4-direction joystick switch with Center-push
Function by Alps. It is positioned on the board so it is easily accessible for interacting
and the lever could be pressed, activating the microswitch that way. The microswitch is
actuated by applying very little physical force, using a tipping-point mechanism which
results in fast and reliable snap-in action. It has both NO (Normal open) contacts routed
to the mikroBUS™ over the port expander. The switch lines are equipped with the RC
filters, which serve as debouncing elements for the switch and also to pull-up the
lines when they are left afloat. This way, the contact bouncing is reduced even further,
resulting in an accurate detection of the switching event.
As already mentioned above, this click board™ contains the port expander, relatively
large number of needed GPIO pins for the joystick switch. Used IC is PCA9538A, Lowvoltage 8-bit I2C-bus I/O port with interrupt and reset, from NXP Semiconductors. It uses
the I2C communication for interfacing with the main MCU, which simplifies the number
of needed pins, and therefore the design itself. The Active LOW reset input (RESET)
and Open-drain active LOW interrupt output (INT) pins helps simplifying the design
even further.
The click board™ also features an onboard jumper selector, which is used to select the
voltage level that is connected to the microswitch input pin, making it usable for both
3V3 and 5V capable microcontoller pins.
SPECIFICATIONS
Type
Pushbutton/Switches
Applications
Cell phones, tablets, terminals, video games, toys, and many
more.
On-board
modules
SKRHABE010 4-direction joystick switch with Center-push
Function by Alps and Port Expander IC from NXP, PCA9538A
Key Features
High-quality microswitch, high mechanical and electrical durability,
debouncing features
Interface
GPIO,I2C
Click board
size
M (42.9 x 25.4 mm)
Input Voltage
3.3V or 5V
PINOUT DIAGRAM
This table shows how the pinout on Joystick 2 click corresponds to the pinout on the
mikroBUS™ socket (the latter shown in the two middle columns).
Notes
Reset IN
Pin
Pin
NC
1
AN
PWM
16
NC
RST
2
RST
INT
15
INT
NC
3
CS
RX
14
NC
Notes
Interrupt Out
NC
4
SCK
TX
13
NC
NC
5
MISO
SCL
12
SCL
I2C Clock
NC
6
MOSI
SDA
11
SDA
I2C Data
Power Supply
3.3V
7
3.3V
5V
10
5V
Ground
GND
8
GND
GND
9
GND
Power supply
Ground
ONBOARD SETTINGS AND INDICATORS
Label
Name
Default
Description
JP1
VCC SEL
Left
Power supply voltage selection. Left position 3V3,
right position 5V
LD1
Power LED
-
Power LED indicates that the click is powered on
JS1
SWITCH
-
Onboard switch
JOYSTICK 2 CLICK ELECTRICAL SPECIFICATIONS
Description
Min
Typ
Max
Unit
Contact resistance
-
-
100
mΩ
Mechanical durability (30 operations/min)
-
-
1 milion
cycles
SOFTWARE SUPPORT
We provide a library for the Joystick 2 click on our LibStock page, as well as a demo
application (example), developed using MikroElektronika compilers. The demo can run
on all the main MikroElektronika development boards.
Library Description
The library initializes and defines the I2C bus driver and drivers that offer a choice for
writing data in register and reads data from register. The library includes function for
Joystick position. The user also has the function for configuration joystick, reset module
and function for read interrupt state.
Key functions:
uint8_t joystick2_getJoystickPosition() - Functions for get Joystick position
void joystick2_configuration(uint8_t cfgData) - Functions for configuration joystick
void joystick2_reset() - Functions for reset module
Examples description
The application is composed of three sections :
System Initialization - Initializes the I2C module and all the necessary GPIO pins
Application Initialization - Initializes the driver init, resets the module, and enables all joystick
positions
Application Task - It reads the position of the joystick, if it detects that the joystick has moved from
the zero position, it prints a message about the current position
void applicationTask()
{
uint8_t joystickPos;
char demoText[ 50 ];
joystickPos = joystick2_getJoystickPosition();
switch(joystickPos)
{
case _JOYSTICK2_BUTTON_ACTIVE:
{
mikrobus_logWrite("‐‐‐ Button is pressed!!! ‐‐‐", _LOG_LINE );
Delay_ms( 300 );
break;
}
case _JOYSTICK2_POSITION_RIGHT:
{
mikrobus_logWrite("‐‐‐ Joystick position [RIGHT] ‐‐‐", _LOG_LINE );
Delay_ms( 300 );
break;
}
case _JOYSTICK2_POSITION_LEFT:
{
mikrobus_logWrite("‐‐‐ Joystick position [LEFT] ‐‐‐", _LOG_LINE );
Delay_ms( 300 );
break;
}
case _JOYSTICK2_POSITION_UP:
{
mikrobus_logWrite("‐‐‐ Joystick position [UP] ‐‐‐", _LOG_LINE );
Delay_ms( 300 );
break;
}
case _JOYSTICK2_POSITION_DOWN:
{
mikrobus_logWrite("‐‐‐ Joystick position [DOWN] ‐‐‐", _LOG_LINE );
Delay_ms( 300 );
break;
}
}
}
The full application code, and ready to use projects can be found on our LibStock page.
Other mikroE Libraries used in the example:
I2C Library
UART Library
Additional notes and informations
Depending on the development board you are using, you may need USB UART
click, USB UART 2 click or RS232 click to connect to your PC, for development systems
with no UART to USB interface available on the board. The terminal available in all
MikroElektronika compilers, or any other terminal application of your choice, can be
used to read the message.
MIKROSDK
This Click board™ is supported with mikroSDK - MikroElektronika Software
Development Kit. To ensure proper operation of mikroSDK compliant Click board™
demo applications, mikroSDK should be downloaded from the LibStock and installed for
the compiler you are using.
For more information about mikroSDK, visit the official page.
https://www.mikroe.com/joystick‐2‐click/8‐29‐19
