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PCR click

PCR Click is a compact add-on board that allows you to use a pulsed coherent radar (PCR) in your application. This board features the XM125, the Entry+ PCR module from Acconeer. The XM125 uses an Acconeer A121 pulsed coherent radar system based on a patented PCR technology with picosecond time resolution.

click Product page

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Click library

• Author : Stefan Ilic
• Date : Nov 2023.
• Type : I2C type

Software Support

We provide a library for the PCR 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 PCR Click driver.

Standard key functions :

• pcr_cfg_setup Config Object Initialization function.

void pcr_cfg_setup ( pcr_cfg_t *cfg );

• pcr_init Initialization function.

err_t pcr_init ( pcr_t *ctx, pcr_cfg_t *cfg );

• pcr_default_cfg Click Default Configuration function.

err_t pcr_default_cfg ( pcr_t *ctx );

Example key functions :

• pcr_write_reg PCR register writing function.

err_t pcr_write_reg ( pcr_t *ctx, uint16_t reg, uint32_t data_in );

• pcr_check_if_busy PCR check if device is busy function.

err_t pcr_check_if_busy ( pcr_t *ctx );

• pcr_get_distance PCR read distance function.

err_t pcr_get_distance ( pcr_t *ctx, uint32_t *distance_data );

Example Description

This example demonstrates the use of PCR click board by reading distance between click board and object.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger and performs the click default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    pcr_cfg_t pcr_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.
    pcr_cfg_setup( &pcr_cfg );
    PCR_MAP_MIKROBUS( pcr_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == pcr_init( &pcr, &pcr_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( PCR_ERROR == pcr_default_cfg ( &pcr ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Reading distance between click board and object every 2 seconds and logging it on UART terminal.

void application_task ( void ) 
{
    uint32_t distance_data = 0;

    pcr_get_distance ( &pcr, &distance_data );
    log_printf( &logger, " Distance: %lu mm \r\n", distance_data );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

}

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.PCR

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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