pressure

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Pressure Click

Pressure 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 : Nemanja Medakovic
• Date : Nov 2019.
• Type : I2C/SPI type

Software Support

Example Description

This is a example which demonstrates the use of Pressure Click board. Measured pressure and temperature data from the LPS331AP sensor on Pressure Click.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Pressure

Example Key Functions

• pressure_cfg_setup Configuration Object Setup function.

void pressure_cfg_setup ( pressure_cfg_t *cfg );

• pressure_init Click Initialization function.

pressure_err_t pressure_init ( pressure_t *ctx, pressure_cfg_t *cfg );

• pressure_default_cfg Click Default Configuration function.

void pressure_default_cfg ( pressure_t *ctx );

• pressure_generic_single_write Generic Single Write function.

pressure_err_t pressure_generic_single_write ( pressure_t *ctx, uint8_t reg_addr, uint8_t data_in );

• pressure_generic_multiple_read Generic Multiple Read function.

pressure_err_t pressure_generic_multiple_read ( pressure_t *ctx, uint8_t reg_addr, uint8_t *data_out, uint8_t n_data );

• pressure_get_pressure Pressure Get function.

float pressure_get_pressure ( pressure_t *ctx );

Application Init

Initializes I2C/SPI serial interface and puts a device to the initial state. Also initializes UART console module for results logging.

void application_init( void )
{
    pressure_cfg_t pressure_cfg;
    log_cfg_t console_cfg;

    //  Click initialization.
    pressure_cfg_setup( &pressure_cfg );
    PRESSURE_MAP_MIKROBUS( pressure_cfg, MIKROBUS_1 );
    pressure_init( &pressure, &pressure_cfg );
    pressure_sw_reset( &pressure );
    pressure_default_cfg( &pressure );

    /** 
     * 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( console_cfg );
    log_init( &console, &console_cfg );
    log_write( &console, "***  Pressure initialization done  ***",
               LOG_FORMAT_LINE );
    log_write( &console, "**************************************",
               LOG_FORMAT_LINE );
}

Application Task

Reads the pressure and temperature results in standard units when measurement was done and sends results to the console (usb uart terminal). Repeats operation every 500ms.

void application_task( void )
{
    uint8_t status;
    float press;
    float temp;

    status = pressure_get_status( &pressure, PRESSURE_FLAG_MASK_P_DATA_RDY |
                                             PRESSURE_FLAG_MASK_T_DATA_RDY );

    while (!status)
    {
        status = pressure_get_status( &pressure, PRESSURE_FLAG_MASK_P_DATA_RDY |
                                                 PRESSURE_FLAG_MASK_T_DATA_RDY );
    }

    press = pressure_get_pressure( &pressure );
    temp = pressure_get_temperature( &pressure );

    log_printf( &console, "** Pressure is %.2f mbar\r\n", press );
    log_printf( &console, "** Temperature is %.2f ", temp );
    log_write( &console, deg_cels, LOG_FORMAT_LINE );
    log_write( &console, "**************************************",
               LOG_FORMAT_LINE );

    Delay_ms ( 500 );
}

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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