8x8r

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8x8 R Click

8x8 R Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : Stefan Ilic
• Date : Jun 2021.
• Type : SPI type

Software Support

Example Description

This demo example shows a drawing of Image, new create string and character on the screen.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.8x8R

Example Key Functions

• c8x8r_cfg_setup Config Object Initialization function.

void c8x8r_cfg_setup ( c8x8r_cfg_t *cfg );

• c8x8r_init Initialization function.

err_t c8x8r_init ( c8x8r_t *ctx, c8x8r_cfg_t *cfg );

• c8x8r_default_cfg Click Default Configuration function.

void c8x8r_default_cfg ( c8x8r_t *ctx );

• c8x8r_write_cmd This function writes a desired number of data bytes starting from the selected register by using SPI serial interface.

void c8x8r_write_cmd ( c8x8r_t *ctx, uint8_t cmd, uint8_t tx_data  );

• c8x8r_display_refresh The function switches off all LEDs.

void c8x8r_display_refresh ( c8x8r_t *ctx );

• c8x8r_display_byte This function displayes one character to the display.

void c8x8r_display_byte ( c8x8r_t *ctx, char tx_byte );

Application Init

Configuring Clicks and log objects. Settings the Click in the default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    c8x8r_cfg_t c8x8r_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.

    c8x8r_cfg_setup( &c8x8r_cfg );
    C8X8R_MAP_MIKROBUS( c8x8r_cfg, MIKROBUS_1 );
    err_t init_flag  = c8x8r_init( &c8x8r, &c8x8r_cfg );
    if ( init_flag == SPI_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    c8x8r_default_cfg ( &c8x8r );
    log_info( &logger, " Application Task " );
    Delay_1sec( );
}

Application Task

Shows one byte, then scrolls the string and image, every 1 sec.

void application_task ( void ) 
{
    c8x8r_display_byte( &c8x8r, demo_char );
    Delay_ms ( 1000 );
    
    c8x8r_display_string( &c8x8r, &demo_string[ 0 ] );
    Delay_ms ( 1000 );

    c8x8r_display_image( &c8x8r, &demo_img_on[ 0 ] );
    Delay_ms ( 500 );

    c8x8r_display_image( &c8x8r, &demo_img_off[ 0 ] );
    Delay_ms ( 1000 );
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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