expand8

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Expand 8 Click

Expand 8 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 : Oct 2021.
• Type : SPI type

Software Support

Example Description

This is an example that demonstrates the use of the Expand 8 Click board.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Expand8

Example Key Functions

• expand8_cfg_setup Config Object Initialization function.

void expand8_cfg_setup ( expand8_cfg_t *cfg );

• expand8_init Initialization function.

err_t expand8_init ( expand8_t *ctx, expand8_cfg_t *cfg );

• expand8_write_data Generic write data function.

void expand8_write_data ( expand8_t *ctx, uint8_t addr, uint8_t tx_data );

• expand8_read_data Generic read data function.

uint8_t expand8_read_data ( expand8_t *ctx, uint8_t addr );

• expand8_set_port Set port function.

err_t expand8_set_port ( expand8_t *ctx, uint8_t sel_port, uint8_t sel_imped );

Application Init

Initialization driver enables - SPI, also write log.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    expand8_cfg_t expand8_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.

    expand8_cfg_setup( &expand8_cfg );
    EXPAND8_MAP_MIKROBUS( expand8_cfg, MIKROBUS_1 );
    err_t init_flag  = expand8_init( &expand8, &expand8_cfg );
    if ( SPI_MASTER_ERROR == init_flag ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    select_port = EXPAND8_ADDR_OUT_LVL_PORT_P0;
    Delay_ms ( 100 );
}

Application Task

This example is working by toggling each of 10 available ports every 1 second. Results are being sent to the Uart Terminal where you can track their changes.

void application_task ( void )
{
    expand8_set_port( &expand8, select_port, EXPAND8_SET_LOW_IMPEDANCE );
    
    log_printf( &logger, "     Port P%d - ON\r\n", ( uint16_t ) select_port );
    log_printf( &logger, "- - - - - - - - - - -\r\n" );
    Delay_ms ( 1000 );
    
    expand8_set_port( &expand8, select_port, EXPAND8_SET_HIGH_IMPEDANCE );
    
    log_printf( &logger, "     Port P%d - OFF\r\n", ( uint16_t ) select_port );
    log_printf( &logger, "---------------------\r\n" );
    Delay_ms ( 1000 );
    
    select_port++;

    if ( select_port > EXPAND8_ADDR_OUT_LVL_PORT_P9 ) {
        select_port = EXPAND8_ADDR_OUT_LVL_PORT_P0;
    }
}

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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