pressure20

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Pressure 20 Click

Pressure 20 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 : Apr 2022.
• Type : I2C/SPI type

Software Support

Example Description

This example demonstrates the use of Pressure 20 Click board by reading and displaying the pressure and temperature data on the USB UART.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Pressure20

Example Key Functions

• pressure20_cfg_setup Config Object Initialization function.

void pressure20_cfg_setup ( pressure20_cfg_t *cfg );

• pressure20_init Initialization function.

err_t pressure20_init ( pressure20_t *ctx, pressure20_cfg_t *cfg );

• pressure20_default_cfg Click Default Configuration function.

err_t pressure20_default_cfg ( pressure20_t *ctx );

• pressure20_get_int_pin This function returns the INT pin logic state.

uint8_t pressure20_get_int_pin ( pressure20_t *ctx );

• pressure20_clear_interrupts This function reads and clears the interrupt status register.

err_t pressure20_clear_interrupts ( pressure20_t *ctx );

• pressure20_read_data This function reads the pressure [mBar] and temperature [Celsius] data.

err_t pressure20_read_data ( pressure20_t *ctx, float *pressure, float *temperature );

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    pressure20_cfg_t pressure20_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.
    pressure20_cfg_setup( &pressure20_cfg );
    PRESSURE20_MAP_MIKROBUS( pressure20_cfg, MIKROBUS_1 );
    err_t init_flag  = pressure20_init( &pressure20, &pressure20_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( PRESSURE20_ERROR == pressure20_default_cfg ( &pressure20 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Waits for the data ready interrupt, clears the interrupts and than reads the pressure [mBar] and temperature [Celsius] data and displays them on the USB UART at the set output data rate (25Hz by default).

void application_task ( void )
{
    // Wait for the data ready interrupt
    while ( pressure20_get_int_pin ( &pressure20 ) );
    float pressure, temperature;
    if ( ( PRESSURE20_OK == pressure20_clear_interrupts ( &pressure20 ) ) &&
         ( PRESSURE20_OK == pressure20_read_data ( &pressure20, &pressure, &temperature ) ) )
    {
        log_printf ( &logger, " Pressure: %.1f mBar\r\n", pressure );
        log_printf ( &logger, " Temperature: %.2f C\r\n\n", temperature );
    }
}

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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