gnssrtk2  2.1.0.0
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GNSS RTK 2 click

GNSS RTK 2 Click is a compact add-on board used to enhance the precision of position data derived from satellite-based positioning systems. This board features the ZED-F9R, a multi-band professional-grade GNSS module with integrated multi-band Real Time Kinematics (RTK) technology offering centimeter-level accuracy from u-blox. This module concurrently uses GNSS signals from all four GNSS constellations (GPS/QZSS, GLONASS, Galileo, and BeiDou) and provides a reliable multi-band RTK turnkey solution with up to 30Hz real-time position update rate and full GNSS carrier raw data.

click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Aug 2022.
  • Type : UART/I2C/SPI type

Software Support

We provide a library for the GNSS RTK 2 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 RTK 2 Click driver.

Standard key functions :

Example key functions :

  • gnssrtk2_reset_device This function resets the device by toggling the RST pin.
  • gnssrtk2_generic_read This function reads a desired number of data bytes from the module.
    err_t gnssrtk2_generic_read ( gnssrtk2_t *ctx, uint8_t *data_out, uint8_t len );
  • gnssrtk2_parse_gngga This function parses the GNGGA data from the read response buffer.
    err_t gnssrtk2_parse_gngga ( char *rsp_buf, uint8_t gngga_element, char *element_data );

Example Description

This example demonstrates the use of GNSS RTK 2 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;
gnssrtk2_cfg_t gnssrtk2_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
gnssrtk2_cfg_setup( &gnssrtk2_cfg );
GNSSRTK2_MAP_MIKROBUS( gnssrtk2_cfg, MIKROBUS_1 );
err_t init_flag = gnssrtk2_init( &gnssrtk2, &gnssrtk2_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 )
{
gnssrtk2_process( &gnssrtk2 );
if ( app_buf_len > ( sizeof ( GNSSRTK2_RSP_GNGGA ) + GNSSRTK2_GNGGA_ELEMENT_SIZE ) )
{
gnssrtk2_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.GNSSRTK2

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.


GNSSRTK2_MAP_MIKROBUS
#define GNSSRTK2_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: gnssrtk2.h:134
gnssrtk2_generic_read
err_t gnssrtk2_generic_read(gnssrtk2_t *ctx, uint8_t *data_out, uint8_t len)
GNSS RTK 2 data reading function.
gnssrtk2_cfg_t
GNSS RTK 2 Click configuration object.
Definition: gnssrtk2.h:203
GNSSRTK2_GNGGA_ELEMENT_SIZE
#define GNSSRTK2_GNGGA_ELEMENT_SIZE
GNSS RTK 2 GNGGA command elements.
Definition: gnssrtk2.h:70
gnssrtk2_reset_device
void gnssrtk2_reset_device(gnssrtk2_t *ctx)
GNSS RTK 2 reset device function.
application_task
void application_task(void)
Definition: main.c:100
gnssrtk2_parse_gngga
err_t gnssrtk2_parse_gngga(char *rsp_buf, uint8_t gngga_element, char *element_data)
GNSS RTK 2 parse GNGGA function.
GNSSRTK2_RSP_GNGGA
#define GNSSRTK2_RSP_GNGGA
Definition: gnssrtk2.h:64
gnssrtk2_s
GNSS RTK 2 Click context object.
Definition: gnssrtk2.h:174
application_init
void application_init(void)
Definition: main.c:69
gnssrtk2_init
err_t gnssrtk2_init(gnssrtk2_t *ctx, gnssrtk2_cfg_t *cfg)
GNSS RTK 2 initialization function.
gnssrtk2_cfg_setup
void gnssrtk2_cfg_setup(gnssrtk2_cfg_t *cfg)
GNSS RTK 2 configuration object setup function.