altitude2

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Altitude 2 Click

Altitude 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 : MikroE Team
• Date : Dec 2019.
• Type : I2C/SPI type

Software Support

Example Description

This example demonstrates the use of Altitude 2 Click to measure temperature, altitude and pressure.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Altitude2

Example Key Functions

• altitude2_cfg_setup Config Object Initialization function.

void altitude2_cfg_setup ( altitude2_cfg_t *cfg );

• altitude2_init Initialization function.

err_t altitude2_init ( altitude2_t *ctx, altitude2_cfg_t *cfg );

• altitude2_read_prom This function reads calibration data from PROM.

uint8_t altitude2_read_prom ( altitude2_t *ctx, uint8_t select_data, uint16_t *data_out );

• altitude2_reset This function resets the device and reads calibration coefficients after reset.

void altitude2_reset( altitude2_t *ctx );

• altitude2_read_data Data read function.

void altitude2_read_data( altitude2_t *ctx, float *temp_data, float *press_data, float *altitude_data );

Application Init

Initializes I2C driver and performs the device reset, after which the calibration coefficients be read. Determines the ratio value for temperature and pressure measurements. Calibration coefficients are necessary to read after the device reset.

void application_init ( void )
{
    log_cfg_t log_cfg;
    altitude2_cfg_t cfg;

    /** 
     * 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.

    altitude2_cfg_setup( &cfg );
    ALTITUDE2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    altitude2_init( &altitude2, &cfg );
    Delay_ms ( 500 );
    altitude2_reset( &altitude2 );
    
    altitude2_set_ratio ( &altitude2, ALTITUDE2_RATIO_2048, ALTITUDE2_RATIO_2048 );
    log_printf( &logger, "Altitude 2 is initialized\r\n" );
    Delay_ms ( 200 );
}

Application Task

Gets temperature data in celsius value and pressure data in mbar value. Gets the calculated altitude value in meters which depends on the temperature and pressure measurements. Logs results on USBUART and repeats operation each second.

void application_task ( void )
{
    altitude2_read_data( &altitude2, &temperature, &pressure, &altitude );

    log_printf( &logger, "Temperature: %.2f Celsius\r\n", temperature );
    log_printf( &logger, "Pressure: %.2f mbar\r\n", pressure );
    log_printf( &logger, "Altitude: %.2f m\r\n", altitude );
    log_printf( &logger, "---------------------------------------\r\n\r\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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