gnss11

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GNSS 11 click

GNSS 11 Click is a compact add-on board that provides fast positioning capability. This board features the EVA-M8M, a concurrent GNSS module from u-blox. The module provides a reception of GPS, GLONASS, Galileo, QZSS, SBAS, and BeiDou. It delivers high sensitivity and minimal acquisition times, with concurrent reception of up to three GNSS, achieved by a dual-frequency RF front-end architecture. This Click board™ makes the perfect solution for the development of both acquisition and tracking devices and represents an ideal product for automotive, consumer, and industrial tracking applications.

click Product page

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Click library

• Author : Stefan Filipovic
• Date : Sep 2023.
• Type : UART/I2C/SPI type

Software Support

We provide a library for the GNSS 11 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for GNSS 11 Click driver.

Standard key functions :

• gnss11_cfg_setup Config Object Initialization function.

void gnss11_cfg_setup ( gnss11_cfg_t *cfg );

• gnss11_init Initialization function.

err_t gnss11_init ( gnss11_t *ctx, gnss11_cfg_t *cfg );

Example key functions :

• gnss11_reset_device This function resets the device by toggling the RST and ANT_ON pins.

void gnss11_reset_device ( gnss11_t *ctx );

• gnss11_generic_read This function reads a desired number of data bytes by using UART serial interface.

err_t gnss11_generic_read ( gnss11_t *ctx, uint8_t *data_out, uint16_t len );

• gnss11_parse_gga This function parses the GGA data from the read response buffer.

err_t gnss11_parse_gga ( uint8_t *rsp_buf, uint8_t gga_element, uint8_t *element_data );

Example Description

This example demonstrates the use of GNSS 11 click by reading and displaying the GNSS coordinates.

The demo application is composed of two sections :

Application Init

Initializes the driver and resets the click board.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    gnss11_cfg_t gnss11_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.
    gnss11_cfg_setup( &gnss11_cfg );
    GNSS11_MAP_MIKROBUS( gnss11_cfg, MIKROBUS_1 );
    if ( GNSS11_OK != gnss11_init( &gnss11, &gnss11_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    gnss11_reset_device ( &gnss11 );
    log_info( &logger, " Application Task " );
}

Application Task

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

void application_task ( void )
{
    gnss11_process( &gnss11 );
    if ( app_buf_len > ( sizeof ( GNSS11_RSP_GGA ) + GNSS11_GGA_ELEMENT_SIZE ) ) 
    {
        gnss11_parser_application( app_buf );
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.GNSS11

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.

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