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mikroSDK Library

Dot Matrix R click

Rating:

5

Author: MIKROE

Last Updated: 2020-07-10

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: LED matrix

Downloaded: 2728 times

Not followed.

License: MIT license  

Dot Matrix R Click is a display device Click board based on a four-digit dot matrix display module, labeled as HCMS-3906. The module holds four 5x7 dot matrices, with very closely spaced, bright red pixel elements. Characters are very clearly displayed as a result.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

Dot Matrix R Click

Dot Matrix R Click

Native view of the Dot Matrix R Click board.

View full image
Dot Matrix R Click

Dot Matrix R Click

Front and back view of the Dot Matrix R Click board.

View full image

Library Description

Library provides functions for parsing and communicating with device for communication and controlling pins.

Key functions:

  • void dotmatrixr_write_ascii ( char *ascii_data ) - Function for showing string to display
  • void dotmatrixr_generic_write ( uint8_t *tx_buf, uint8_t buf_len ) - Function for writing data to device
  • void dotmatrixr_restart ( void ) - Function for restarting device

Examples description

The application is composed of three sections :

  • System Initialization - Initialization of SPI module and additional pins
  • Application Initialization - Confgures device
  • Application Task - Display shows 3 different data in span of 1 second
void application_task ( )
{
    dotmatrixr_write_ascii( &demo_t1[ 0 ] );
    Delay_ms( 1000 );
    dotmatrixr_write_ascii( &demo_t2[ 0 ] );
    Delay_ms( 1000 );
    dotmatrixr_write_ascii( &demo_t3[ 0 ] );
    Delay_ms( 1000 );
}

Other mikroE Libraries used in the example:

  • SPI

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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.

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