diffpress2

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Diff Press 2 Click

Diff Press 2 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 : Luka Filipovic
• Date : Sep 2021.
• Type : I2C type

Software Support

Example Description

This example application showcases ability for device to read and calculate mass flow or diff press pressure in Pascals and temperature in degrees Celsius.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.DiffPress2

Example Key Functions

• diffpress2_cfg_setup Config Object Initialization function.

void diffpress2_cfg_setup ( diffpress2_cfg_t *cfg );

• diffpress2_init Initialization function.

err_t diffpress2_init ( diffpress2_t *ctx, diffpress2_cfg_t *cfg );

• diffpress2_default_cfg Click Default Configuration function.

err_t diffpress2_default_cfg ( diffpress2_t *ctx );

• diffpress2_get_id Reads device ID's

err_t diffpress2_get_id ( diffpress2_t *ctx );

• diffpress2_reset Reset device

err_t diffpress2_reset ( diffpress2_t *ctx );

• diffpress2_trigger_measurement Pressure and temperature reading

err_t diffpress2_trigger_measurement ( diffpress2_t *ctx, uint16_t trigger_type, 
                                       float *diff_press, float *temperature );

Application Init

Initialization of module communication(I2C, UART) and additional interrupt pin. Resets device and reads serial and product ID's and logs them.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    diffpress2_cfg_t diffpress2_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.
    diffpress2_cfg_setup( &diffpress2_cfg );
    DIFFPRESS2_MAP_MIKROBUS( diffpress2_cfg, MIKROBUS_1 );
    err_t init_flag = diffpress2_init( &diffpress2, &diffpress2_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

    if ( diffpress2_default_cfg ( &diffpress2 ) ) 
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_printf( &logger, " > Product ID: 0x%.8LX\r\n", diffpress2.product_id );
    log_printf( &logger, " > Serial ID: 0x%.8LX%.8LX\r\n", 
                diffpress2.serial_id[ 0 ], diffpress2.serial_id[ 1 ] );

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

Application Task

Read and calculate differential in Pascal and temperature in degrees Celsius every 300ms.

void application_task ( void )
{
    float pressure;
    float temperature;

    if ( diffpress2_trigger_measurement( &diffpress2, DIFFPRESS2_CMD_TRIGGER_MEAS_DIFF_PRESS, 
                                         &pressure, &temperature ) )
    {
        log_error( &logger, " Read data." );
    }
    else
    {
        log_printf( &logger, " > Pressure[Pa]: %.2f\r\n", pressure );
        log_printf( &logger, " > Temperature[degC]: %.2f\r\n", temperature );
        log_printf( &logger, "*************************************\r\n" );
    }

    Delay_ms ( 300 );
}

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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