OLED W click

OLED W click carries a 96 x 39px white monochrome passive matrix OLED display. The display is bright, has a wide viewing angle and low power consumption.

click Product page

Click library

• Author : Stefan Ilic
• Date : Jun 2021.
• Type : I2C/SPI type

Software Support

We provide a library for the OLEDW Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for OLEDW Click driver.

Standard key functions :

• oledw_cfg_setup Config Object Initialization function.

  void oledw_cfg_setup ( oledw_cfg_t *cfg );

• oledw_init Initialization function.

  err_t oledw_init ( oledw_t *ctx, oledw_cfg_t *cfg );

Example key functions :

• oledw_send This function sends commands or data to OLED W click.

  err_t oledw_send( oledw_t *ctx, oledw_data_t tx_data, oledw_data_mode_t data_mode );

• oledw_display_picture This function allows user to display picture for page addressing mode.

  void oledw_display_picture( oledw_t *ctx, oledw_resources_t *pic );

• oledw_set_contrast This function sets the display contrast level (0 to 255).

  void oledw_set_contrast( oledw_t *ctx, oledw_data_t value );

Example Description

This example demonstrates the use (control) of the OLED W display.

The demo application is composed of two sections :

Application Init

Configures the microcontroller for communication and initializes the click board to default state.

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    oledw_cfg_t oledw_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 );
    Delay_ms ( 100 );
    log_info( &logger, " Application Init " );

    // Click initialization.
    oledw_cfg_setup( &oledw_cfg );
    OLEDW_MAP_MIKROBUS( oledw_cfg, MIKROBUS_1 );
    err_t init_flag  = oledw_init( &oledw, &oledw_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    oledw_default_cfg ( &oledw );
    log_info( &logger, " Application Task " );
}

Application Task

This section contains the main program that is executed showing a practical example on how to use the implemented functions.

void application_task ( void ) {
    uint8_t i;

    oledw_display_picture( &oledw, oledw_img );
    Delay_ms ( 500 );
    oledw_send( &oledw, OLEDW_INVERTDISPLAY, OLEDW_COMMAND );
    Delay_ms ( 500 );
    oledw_send( &oledw, OLEDW_NORMALDISPLAY, OLEDW_COMMAND );
    Delay_ms ( 500 );
    oledw_send( &oledw, OLEDW_INVERTDISPLAY, OLEDW_COMMAND );
    Delay_ms ( 500 );
    oledw_send( &oledw, OLEDW_NORMALDISPLAY, OLEDW_COMMAND );
    Delay_ms ( 300 );

    for (i = 0xAF; i > 0x00; i--) {
        oledw_set_contrast( &oledw, i );
        Delay_ms ( 5 );
    }

    for (i = 0x00; i < 0xAF; i++) {
        oledw_set_contrast( &oledw, i );
        Delay_ms ( 5 );
    }

    oledw_scroll_right( &oledw, 0x00, 0x05 );
    Delay_ms ( 1000 );
    oledw_stop_scroll( &oledw );
    oledw_display_picture( &oledw, oledw_img );

    oledw_scroll_left( &oledw, 0x00, 0x05 );
    Delay_ms ( 1000 );
    oledw_stop_scroll( &oledw );
    oledw_display_picture( &oledw, oledw_img );

    oledw_scroll_diag_right( &oledw, 0x00, 0x05 );
    Delay_ms ( 1000 );
    oledw_stop_scroll( &oledw );
    oledw_display_picture( &oledw, oledw_img );

    oledw_scroll_diag_left( &oledw, 0x00, 0x05 );
    Delay_ms ( 1000 );
    oledw_stop_scroll( &oledw );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.OLEDW

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 MikroElektronika compilers.