GNSS ZOE click

GNSS ZOE Click is a evaluation board for ultra small ZOE-M8Q GNSS SiP receiver from u-blox.

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Click library

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

Software Support

We provide a library for the GNSS ZOE 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 ZOE Click driver.

Standard key functions :

• gnsszoe_cfg_setup Config Object Initialization function.

  void gnsszoe_cfg_setup ( gnsszoe_cfg_t *cfg );

• gnsszoe_init Initialization function.

  err_t gnsszoe_init ( gnsszoe_t *ctx, gnsszoe_cfg_t *cfg );

• gnsszoe_default_cfg Click Default Configuration function.

  err_t gnsszoe_default_cfg ( gnsszoe_t *ctx );

Example key functions :

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

  void gnsszoe_reset_device ( gnsszoe_t *ctx );

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

  err_t gnsszoe_generic_read ( gnsszoe_t *ctx, uint8_t *data_out, uint8_t len );

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

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

Example Description

This example demonstrates the use of GNSS ZOE 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. */
    gnsszoe_cfg_t gnsszoe_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.
    gnsszoe_cfg_setup( &gnsszoe_cfg );
    GNSSZOE_MAP_MIKROBUS( gnsszoe_cfg, MIKROBUS_1 );
    err_t init_flag = gnsszoe_init( &gnsszoe, &gnsszoe_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 )
{
    gnsszoe_process( &gnsszoe );
    if ( app_buf_len > ( sizeof ( GNSSZOE_RSP_GNGGA ) + GNSSZOE_GNGGA_ELEMENT_SIZE ) ) 
    {
        gnsszoe_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.GNSSZOE

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.