Library Description

The library covers all functionalities of EPA20-A eINK display.

Key functions:

• eink_fill_screen( uint8_t color ) - Fills the screen with provided color.
• eink_text( uint8_t *text, uint8_t x, uint8_t y ) - Writes text on the screen.
• eink_image_bmp( const uint8_t* img ) - Displays image on the screen.

Examples Description

The application is composed of three sections:

• System Initialization - Initializes SPI module and CS pin, RST pin, PWM pin as output and INT pin as an input.
• Application Initialization - Initializes driver and configures the display
• Application Task - (code snippet) - Repeats operations with a pause of 3 seconds between them.
  • Display black letters on a white background
  • Display white letters on a black background
  • Display external image

void applicationTask()
{
 eink_fill_screen( _EINK_COLOR_WHITE );
 eink_set_font( &guiFont_Exo_2_Condensed21x32_Regular[0], 
_EINK_COLOR_BLACK, _FO_HORIZONTAL );
 eink_text( &_eINK_Text[0], 14, 50 );
 delay_ms( 3000 );

 eink_fill_screen( _EINK_COLOR_BLACK );
 eink_set_font( &guiFont_Exo_2_Condensed21x32_Regular[0], 
_EINK_COLOR_WHITE, _FO_HORIZONTAL );
 eink_text( &_eINK_Text[0], 14, 50 );
 Delay_ms( 3000 );

 eink_image_bmp( &_mikroe_bmp[0] );
 Delay_ms( 3000 );
}

The example carries bmp image converted to an array using Visual TFT.

Other mikroE Libraries used in the example:

• SPI

Additional notes and information

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.