Oled Switch Click

How does it work?

OLED Switch Click is based on the ISC15ANP4, a programmable smart display from NKK Switches. The OLED display has a 64×48 pixels resolution with up to 65K colors (16-bit depth), or 256 colors in 8-bit mode, and a 180° of viewing angle. The life expectancy is up to 60000 hours depending on the luminance of the display and the percentage of the pixels set to on. The display is perfect for displaying simple information, whether as icons or words. The most interesting feature is that the display can be programmed to change the picture when needed. For example, you can design a reprogrammable keypad that switches from Latin to Cyrillic script or Chinese characters.

The internal frame buffer on the OLED display holds 96×64 pixels with 2 bytes of 565 formatted color information for each. When displaying an image that is the size of the display (64×48), the image will be displayed well unless scrolled. To scroll an image without having random pixels from unused space in the internal frame buffer, load a 96×64 image onto the OLED Switch Click with your desired image centered like the blue-colored area or similar. VisualTFT can be used to prepare the BMP images. There is a learn.microe.com article that explains how to take 16 or 24-bit BMP pictures and create C arrays. The article is about RGB matrices, but the same principle applies.

The mechanical button itself is nicely built, with translucent black housing. When pressed, it gives satisfying tactile feedback and has a distinct, long travel of 4.5mm. Its contacts have a 0.1A@12VDC rating to switch an external circuit over screw terminals. The internal button circuit is an SPST and is normally open. The pressure on the button itself above 100N can damage the OLED. In addition, this Click board™ features the MAX8574, a high-efficiency LCD boost with true shutdown from Analog Devices, that serves as a main OLED drive circuit power supply obtained from the mikroBUS™ 3.3V power rail.

The OLED Switch Click uses an SPI serial interface to communicate with the host MCU. In addition, the OLED can be reset over the RST pin, and a CD pin can set data to be interpreted as a Command or as Data depending on the logic state. The host MCU cannot know the push button’s state over the mikroBUS™ socket.

This Click board™ can only be operated with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing 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 Oled Switch 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	CD	Command/Data
Reset	RST	2	RST	INT	15	NC
SPI Chip Select	CS	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
SPI Data IN	SDI	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Oled Switch Click electrical specifications

Software Support

We provide a library for the OLED Switch 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 OLED Switch Click driver.

Key functions

• This function writes to control and configuration registers on the chip.

• This function sets the digital output signal for the PWM pin.

• This function sets the digital output signal for the RST pin.

Example Description

This example showcases how to configure and use the OLED Switch click. This click is a combination of a button and a full color organic LED display. Displays settings are first loaded onto the chip and after that you can show any 64×48 pixel image on the display.

 void application_task ( ) 
 { 
     oledswitch_draw_image( &oledswitch, array_red, OLEDSWITCH_IMG_SIZE_NORMAL ); 
     Delay_1sec( ); 

     oledswitch_draw_image( &oledswitch, array_green, OLEDSWITCH_IMG_SIZE_NORMAL ); 
     Delay_1sec( ); 

     oledswitch_draw_image( &oledswitch, array_blue, OLEDSWITCH_IMG_SIZE_NORMAL ); 
     Delay_1sec( ); 
 }

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.OledSwitch

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. 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.