expand12

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Expand 12 Click

Expand 12 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 Filipovic
• Date : Sep 2021.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of Expand 12 Click board.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Expand12

Example Key Functions

• expand12_cfg_setup Config Object Initialization function.

void expand12_cfg_setup ( expand12_cfg_t *cfg );

• expand12_init Initialization function.

err_t expand12_init ( expand12_t *ctx, expand12_cfg_t *cfg );

• expand12_default_cfg Click Default Configuration function.

err_t expand12_default_cfg ( expand12_t *ctx );

• expand12_set_pin_direction This function sets the direction of the selected pin.

err_t expand12_set_pin_direction ( expand12_t *ctx, uint8_t pin, uint8_t direction );

• expand12_set_pin_value This function sets the logic level of the selected pin.

err_t expand12_set_pin_value ( expand12_t *ctx, uint8_t pin, uint8_t pin_value );

• expand12_read_all_pins_value This function reads all pins logic levels.

err_t expand12_read_all_pins_value ( expand12_t *ctx, uint32_t *pins_value );

Application Init

Initializes the driver and performs the Click default configuration which sets the first three ports (pins 4-23) as output and the fourth port (pins 24-31) as input with pull-ups.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    expand12_cfg_t expand12_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.
    expand12_cfg_setup( &expand12_cfg );
    EXPAND12_MAP_MIKROBUS( expand12_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == expand12_init( &expand12, &expand12_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( EXPAND12_ERROR == expand12_default_cfg ( &expand12 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Sets the pins of the first three ports and then reads the status of all pins and displays the result on the USB UART approximately every 100 miliseconds.

void application_task ( void )
{
    static uint8_t port_value = 0;
    static uint32_t pins_status = 0;
    
    expand12_set_port_value( &expand12, EXPAND12_PORT_4_7, EXPAND12_ALL_PINS, port_value );
    expand12_set_port_value( &expand12, EXPAND12_PORT_8_15, EXPAND12_ALL_PINS, port_value );
    expand12_set_port_value( &expand12, EXPAND12_PORT_16_23, EXPAND12_ALL_PINS, port_value++ );
        
    expand12_read_all_pins_value( &expand12, &pins_status );
    log_printf( &logger, " Pins status (32-bit) : 0x%.8LX\r\n\n", pins_status );
    Delay_ms ( 100 );
}

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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