Beginner
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Explore how GP2Y0A60SZ0F and STM32F042C6 takes distance measurement to a new heights

Seeing with infrared eyes

IR Distance Click with UNI Clicker

Published Sep 19, 2023

Click board™

IR Distance Click

Development board

UNI Clicker

Compiler

NECTO Studio

MCU

STM32F042C6

Simplify distance measurement challenges with infrared sensors, paving the way for smarter, more efficient systems across industries

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Hardware Overview

How does it work?

IR Distance Click is based on the GP2Y0A60SZ0F, a distance-measuring sensor unit from Sharp. The sensor provides a voltage corresponding to the detection distance, which is why it can also be used as a proximity sensor. The triangulation method of measuring the distance means the determination of the location of an object by forming triangles to the point of known points. In the case of the GP2Y0A60SZ0F, the IR LED emits a narrow light beam and, after reflecting from an object, is directed to the sensor lens of the PSD. Depending on the object, the angle of the reflected light will be different. The conductivity

of the PSD depends on the position where the reflected beam falls and is afterward converted to voltage, where the distance can be calculated using an analog-digital converter. The IR Distance Click communicates with the host MCU by sending analog values over the OUT pin of the mikroBUS™ socket. The OUT pin provides information to the MCU about the presence of an object and its distance, where the output of the distance sensor is inversely proportional, meaning that when the distance grows, the output decreases. The main control pin of the sensor can be accessed over the EN pin of the mikroBUS™

socket, thus enabling the sensor to work. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumpers. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Note that all the jumpers' positions must be on the same side, or the Click board™ may become unresponsive. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

IR Distance Click hardware overview image

Features overview

Development board

UNI Clicker is a compact development board designed as a complete solution that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It supports a wide range of microcontrollers, such as different ARM, PIC32, dsPIC, PIC, and AVR from various vendors like Microchip, ST, NXP, and TI (regardless of their number of pins), four mikroBUS™ sockets for Click board™ connectivity, a USB connector, LED indicators, buttons, a debugger/programmer connector, and two 26-pin headers for interfacing with external electronics. Thanks to innovative manufacturing technology, it allows you to build

gadgets with unique functionalities and features quickly. Each part of the UNI Clicker development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the UNI Clicker programming method, using a third-party programmer or CODEGRIP/mikroProg connected to onboard JTAG/SWD header, the UNI Clicker board also includes a clean and regulated power supply module for the development kit. It provides two ways of board-powering; through the USB Type-C (USB-C) connector, where onboard voltage regulators provide the appropriate voltage levels to each component on the board, or using a Li-Po/Li

Ion battery via an onboard battery connector. All communication methods that mikroBUS™ itself supports are on this board (plus USB HOST/DEVICE), including the well-established mikroBUS™ socket, a standardized socket for the MCU card (SiBRAIN standard), and several user-configurable buttons and LED indicators. UNI Clicker is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

UNI clicker double image

Microcontroller Overview

MCU Card / MCU

default

Type

8th Generation

Architecture

ARM Cortex-M0

MCU Memory (KB)

32

Silicon Vendor

STMicroelectronics

Pin count

48

RAM (Bytes)

6144

Used MCU Pins

mikroBUS™ mapper

Distance Measurement Value
PA0
AN
Enable
PA15
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Schematic

IR Distance Click Schematic schematic

Step by step

Project assembly

UNI Clicker front image hardware assembly

Start by selecting your development board and Click board™. Begin with the UNI Clicker as your development board.

UNI Clicker front image hardware assembly
Thermo 28 Click front image hardware assembly
SiBRAIN for STM32F745VG front image hardware assembly
Prog-cut hardware assembly
UNI Clicker MB 1 - upright/with-background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Necto image step 7 hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Track your results in real time

Application Output

After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.

Application Output Step 1

After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.

Application Output Step 3

Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.

Application Output Step 4

Software Support

Library Description

This library contains API for IR Distance Click driver.

Key functions:

  • irdistance_enable - This function enable distance measuring sensor

  • irdistance_read_adc - This function reads ADC data using analog_in_read function

  • irdistance_get_voltage_out - This function calculate the voltage output of distance measuring sensor

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

/*!
 * \file 
 * \brief IR distance Click example
 * 
 * # Description
 * The click board outputs an analog voltage corresponding to the distance of the object 
 * (through the mikroBUS AN pin). An Enable (EN) pin is also utilized.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initialization driver enables GPIO, enable IR sensor, initialization ADC, also write log.
 * 
 * ## Application Task  
 * This is an example which demonstrates the use of IR Distance click board.
 * IR Distance click reads and displays ADC value.
 * Results are being sent to the Usart Terminal where you can track their changes.
 * All data logs on USB uart change for every 1 sec.
 * 
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "irdistance.h"

// ------------------------------------------------------------------ VARIABLES

static irdistance_t irdistance;
static log_t logger;

static uint16_t adc_val;
static float voltage_val;

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    irdistance_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.

    irdistance_cfg_setup( &cfg );
    IRDISTANCE_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    if ( irdistance_init( &irdistance, &cfg ) == ADC_ERROR )
    {
        log_info( &logger, "---- Application Init Error ----" );
        log_info( &logger, "---- Please, run program again ----" );

        for ( ; ; );
    }
    irdistance_enable_device( &irdistance );
    log_info( &logger, "---- Application Init Done ----\r\n" );

    voltage_val = 0;
    adc_val = 0;
}

void application_task ( void )
{
    if ( irdistance_read_adc( &irdistance, &adc_val ) != ADC_ERROR )
    {
        log_printf( &logger, " ADC value on the pin : %u\r\n", adc_val );
    }

    if ( irdistance_get_pin_voltage( &irdistance, &voltage_val ) != ADC_ERROR )
    {
        log_printf( &logger, " Voltage value on the pin : %.2f\r\n", voltage_val );
    }

    log_printf( &logger, "------------------------------\r\n" );
    Delay_ms( 1000 );
}

void main ( void )
{
    application_init( );

    for ( ; ; )
    {
        application_task( );
    }
}


// ------------------------------------------------------------------------ END

Additional Support

Resources