Button G Click

How does it work?

Button G Click is based on the 3006.2117, a tactile switch with integrated independent green LED from Marquardt. The tactile switch has a debounce circuit to eliminate the ripple signal and provide a clean transition at its output and is pulled down. The round transparent button of the tactile switch is 6.8mm in diameter and has a green LED background light. This LED can be programmed as feedback to the user to make a visual expression of knowing the contact has been made. Since the backlight LED is controlled independently, it can be programmed in different patterns, such as varying light levels, light intensity, or blinking rate on subsequent button presses, thus giving additional feedback to the end user.

The tactile button of this Click board™ sends an interrupt signal to the host MCU using the INT pin of the mikroBUS™ socket. The host MCU can control the integrated red LED using the PWM pin of the mikroBUS™ socket. The Pulse Width Modulation (PWM) lets you program this LED using various blinking patterns and light intensity.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

Specifications

Pinout diagram

This table shows how the pinout on Button G Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	PWM	PWM for LED Intensity
	NC	2	RST	INT	15	INT	Interrupt
	NC	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Button G Click electrical specifications

Software Support

We provide a library for the Button G Click as well as a demo application (example), developed using Mikroe compilers. The demo can run on all the main Mikroe development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Button G Click driver.

Key functions

• buttong_pwm_stop This function stops the PWM moudle output.

• buttong_pwm_start This function starts the PWM moudle output.

• buttong_get_button_state This function reads the digital signal from the INT pin which tells us whether the button has been pressed or not.

Example Description

This example showcases how to initialize and use the whole family of Button clicks. One library is used for every single one of them. They are simple touch detectors which send a pressed/released signal and receive a PWM output which controls the backlight on the button.

 void application_task ( void ) { 
     button_state = buttong_get_button_state( &buttong ); 
     if ( button_state && ( button_state != button_state_old ) ) { 
         backligh_off( ); 
         button_state_old = button_state; 
         Delay_ms( 500 ); 
     } else if ( !button_state && ( button_state != button_state_old ) ) { 
         backlight_on( ); 
         button_state_old = button_state; 
         Delay_ms( 500 ); 
     } 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.ButtonG

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. UART terminal is available in all Mikroe compilers.

mikroSDK

This Click board™ is supported with mikroSDK – Mikroe Software Development Kit, that needs to be downloaded from the LibStock and installed for the compiler you are using to ensure proper operation of mikroSDK compliant Click board™ demo applications.

For more information about mikroSDK, visit the official page.