expand13

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Expand 13 Click

Expand 13 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 : Oct 2021.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of Expand 13 Click board, by writing data to all six ports and then reading back the status of the ports.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Expand13

Example Key Functions

• expand13_cfg_setup Config Object Initialization function.

void expand13_cfg_setup ( expand13_cfg_t *cfg );

• expand13_init Initialization function.

err_t expand13_init ( expand13_t *ctx, expand13_cfg_t *cfg );

• expand13_enable_device This function enables the device by setting the RST pin to high logic state.

void expand13_enable_device ( expand13_t *ctx );

• expand13_write_all_ports This function writes a desired data to all 6 ports.

err_t expand13_write_all_ports ( expand13_t *ctx, uint8_t *ports );

• expand13_read_all_ports This function reads the state of all 6 ports.

err_t expand13_read_all_ports ( expand13_t *ctx, uint8_t *ports );

Application Init

Initializes the driver and enables the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    expand13_cfg_t expand13_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.
    expand13_cfg_setup( &expand13_cfg );
    EXPAND13_MAP_MIKROBUS( expand13_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == expand13_init( &expand13, &expand13_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    expand13_enable_device ( &expand13 );
    log_info( &logger, " Application Task " );
}

Application Task

Sets the pins of all ports and then reads and displays their status on the USB UART approximately once per second.

void application_task ( void )
{
    uint8_t port_value[ 6 ] = { 0 };
    uint16_t pin_num = 0;
  
    for ( pin_num = EXPAND13_PIN_0_MASK; pin_num <= EXPAND13_PIN_7_MASK; pin_num <<= 1 )
    {
        if ( !expand13_get_int_pin ( &expand13 ) )
        {
            log_printf( &logger, " External input has occurred.\r\n" );
        }
        
        memset ( port_value, pin_num, 6 );
        expand13_write_all_ports( &expand13, port_value );
        
        expand13_read_all_ports( &expand13, port_value );
        for ( uint8_t cnt = EXPAND13_PORT_0; cnt <= EXPAND13_PORT_5; cnt++ )
        {
            log_printf( &logger, " Status port %d : 0x%.2X\r\n", ( uint16_t ) cnt, ( uint16_t ) port_value[ cnt ] );
        }
        log_printf( &logger, "\n" );
        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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