gnssrtk

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GNSS RTK Click

GNSS RTK 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 : Jul 2023.
• Type : UART/I2C/SPI type

Software Support

Example Description

This example demonstrates the use of GNSS RTK Click by reading and displaying the GNSS coordinates.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.GNSSRTK

Example Key Functions

• gnssrtk_cfg_setup Config Object Initialization function.

void gnssrtk_cfg_setup ( gnssrtk_cfg_t *cfg );

• gnssrtk_init Initialization function.

err_t gnssrtk_init ( gnssrtk_t *ctx, gnssrtk_cfg_t *cfg );

• gnssrtk_default_cfg Click Default Configuration function.

err_t gnssrtk_default_cfg ( gnssrtk_t *ctx );

• gnssrtk_reset_device This function resets the device by toggling the RST pin.

void gnssrtk_reset_device ( gnssrtk_t *ctx );

• gnssrtk_generic_read This function reads a desired number of data bytes from the module.

err_t gnssrtk_generic_read ( gnssrtk_t *ctx, uint8_t *data_out, uint8_t len );

• gnssrtk_parse_gngga This function parses the GNGGA data from the read response buffer.

err_t gnssrtk_parse_gngga ( char *rsp_buf, uint8_t gngga_element, char *element_data );

Application Init

Initializes the driver and resets the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    gnssrtk_cfg_t gnssrtk_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.
    gnssrtk_cfg_setup( &gnssrtk_cfg );
    GNSSRTK_MAP_MIKROBUS( gnssrtk_cfg, MIKROBUS_1 );
    err_t init_flag = gnssrtk_init( &gnssrtk, &gnssrtk_cfg );
    if ( ( UART_ERROR == init_flag ) || ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads the received data, parses the GNGGA info from it, and once it receives the position fix it will start displaying the coordinates on the USB UART.

void application_task ( void )
{
    gnssrtk_process( &gnssrtk );
    if ( app_buf_len > ( sizeof ( GNSSRTK_RSP_GNGGA ) + GNSSRTK_GNGGA_ELEMENT_SIZE ) ) 
    {
        gnssrtk_parser_application( app_buf );
    }
}

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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