gnss3

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GNSS3 Click

GNSS3 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 : apr 2020.
• Type : UART GPS/GNSS type

Software Support

Example Description

This example demonstrates the use of GNSS 3 Click by reading and displaying the GPS coordinates.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Gnss3

Example Key Functions

• gnss3_cfg_setup Config Object Initialization function.

void gnss3_cfg_setup ( gnss3_cfg_t *cfg );

• gnss3_init Initialization function.

err_t gnss3_init ( gnss3_t *ctx, gnss3_cfg_t *cfg );

• gnss3_parse_gngga GNSS 3 parse GNGGA function.

err_t gnss3_parse_gngga ( char *rsp_buf, uint8_t gngga_element, char *element_data );

• gnss3_generic_read Generic read function.

int32_t gnss3_generic_read ( gnss3_t *ctx, char *data_buf, uint16_t max_len );

• gnss3_module_wakeup Wake-up module.

void gnss3_module_wakeup ( gnss3_t *ctx );

Application Init

Initializes the driver and resets the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    gnss3_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.

    gnss3_cfg_setup( &cfg );
    GNSS3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    gnss3_init( &gnss3, &cfg );

    gnss3_module_wakeup( &gnss3 );
    Delay_ms ( 1000 );
}

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 )
{
    gnss3_process( &gnss3 );
    if ( app_buf_len > ( sizeof ( ( char * ) GNSS3_RSP_GNGGA ) + GNSS3_GNGGA_ELEMENT_SIZE ) ) 
    {
        gnss3_parser_application( app_buf );
    }
}

Note

The default baud rate for communication UART is set to 9600. If you receive a Click board on which the default baud rate for UART is set differently, you will need to change the setting in the gnss13_setup_cfg function.

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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