eINK click
eINK click
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eINK click is an adapter for connecting eINK displays, with a 24pin ribbon cable. The eINK display sold with the click can retain the image even when the power is off. The click board™ is designed to run on a 3.3V power supply. It communicates over SPI interface.
eINK displays
The display uses electronic ink, which makes the display “Bistable”. It means that the display consumes power only when something is changing on the screen. This reduces the power consumption of the target device considerably. So, the display retains the image even when the power is off.
eINK displays have good sunlight readability, it's like you are reading something on real paper. It is the same type of display used in you ebook reader, like the Kindle™.
How the click works
The display communicates with the eINK click over SPI interface. The onboard LM75 temperature sensor is used for temperature calibration from the look-up table.
The click can be used with different eINK displays we plan to release in the future.
Display features
The eINK display (EA EPA20-A) is a high-contrast e-paper display. It has a wide viewing angle and the resolution of 172X72 dots. The color of the display has four scales: black, dark gray, light gray, and white.
The power consumption, while the display is on, is around 40mW.
Specifications
Type | Electronic Paper Display |
Applications | Adding a display where low power consumption is necessary. |
On-board modules | LMA temperature sensor |
Key Features | The eINK displays retains an image even when the power is off |
Interface | GPIO,SPI |
Input Voltage | 3.3V |
Compatibility | mikroBUS |
Click board size | S (28.6 x 25.4 mm) |
Pinout diagram
This table shows how the pinout on eINK click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
Programming
Code examples for eINK click, written for MikroElektronika hardware and compilers are available on Libstock.
Code snippet
This code snippet initializes the MCU and eINK click and in an endless loop displays black letters, white letters and external image, respectively.
01 void main() 02 { 03 sysinit(); 04 eink_init(); 05 Delay_ms( 1000 ); 06 07 while( 1 ) 08 { 09 // Display black letters on white background 10 eink_fill_screen( EINK_COLOR_WHITE ); 11 eink_set_font( guiFont_Exo_2_Condensed21x32_Regular, EINK_COLOR_BLACK, FO_HORIZONTAL ); 12 eink_text( "EINK", 14, 50 ); 13 delay_ms( 3000 ); 14 15 // Display white letters on black background 16 eink_fill_screen( EINK_COLOR_BLACK ); 17 eink_set_font( guiFont_Exo_2_Condensed21x32_Regular, EINK_COLOR_WHITE, FO_HORIZONTAL ); 18 eink_text( "EINK", 14, 50 ); 19 Delay_ms( 3000 ); 20 21 // Display external image 22 eink_image_bmp( _mikroe_bmp ); 23 Delay_ms( 3000 ); 24 } 25 }
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