Intermediate
30 min

Verify your connections easily and save valuable time during the debugging phase using STM32F302VC

Effortless diagnostics: The ultimate tool for logic level confirmation

Tester Click with CLICKER 4 for STM32F302VCT6

Published Jul 22, 2025

Click board™

Tester Click

Dev. board

CLICKER 4 for STM32F302VCT6

Compiler

NECTO Studio

MCU

STM32F302VC

Our mission is to empower developers with a convenient and user-friendly diagnostic tool that simplifies the hardware testing process, ensuring a smoother development journey

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Hardware Overview

How does it work?

Tester Click is a Click board™ used as a diagnostic tool on the mikroBUS™ socket. It contains an array of 2x6 LEDs, which signalize the presence of the HIGH/LOW logic level on each pin, providing a visual feedback to the developer. Two additional LEDs indicate the presence of +3.3V and +5V on the mikroBUS™ power rails. This simple diagnostic tool can save hours of troubleshooting, saving the

application developer from having to connect various complicated measurement instruments, only to test logic states on the specific mikroBUS™ pins. Each pin of the mikroBUS™ is routed to a red colored LED, which is protected by 1K resistor. This allows voltages up to VCC to be handled with no issues, providing a simple and clean solution for pin state testing. Once placed on the mikroBUS™

socket, no additional settings are required. There are no ICs or other active elements besides the LEDs. Its simplicity makes it very simple to use: as soon as it is connected, red and green power indication LEDs will signalize the presence of +3.3V and +5V on both the mikroBUS™ power rails. The rest of the LED array will be lit according to the state on the respective pin.

Tester Click top side image
Tester Click bottom side image

Features overview

Development board

Clicker 4 for STM32F3 is a compact development board designed as a complete solution, you can use it to quickly build your own gadgets with unique functionalities. Featuring a STM32F302VCT6, four mikroBUS™ sockets for Click boards™ connectivity, power managment, and more, it represents a perfect solution for the rapid development of many different types of applications. At its core, there is a STM32F302VCT6 MCU, a powerful microcontroller by STMicroelectronics, based on the high-

performance Arm® Cortex®-M4 32-bit processor core operating at up to 168 MHz frequency. It provides sufficient processing power for the most demanding tasks, allowing Clicker 4 to adapt to any specific application requirements. Besides two 1x20 pin headers, four improved mikroBUS™ sockets represent the most distinctive connectivity feature, allowing access to a huge base of Click boards™, growing on a daily basis. Each section of Clicker 4 is clearly marked, offering an intuitive and clean interface. This makes working with the development

board much simpler and thus, faster. The usability of Clicker 4 doesn’t end with its ability to accelerate the prototyping and application development stages: it is designed as a complete solution which can be implemented directly into any project, with no additional hardware modifications required. Four mounting holes [4.2mm/0.165”] at all four corners allow simple installation by using mounting screws. For most applications, a nice stylish casing is all that is needed to turn the Clicker 4 development board into a fully functional, custom design.

CLICKER 4 for STM32F302VCT6 double image

Microcontroller Overview

MCU Card / MCU

STM32F302VC Image

Architecture

ARM Cortex-M4

MCU Memory (KB)

256

Silicon Vendor

STMicroelectronics

Pin count

100

RAM (Bytes)

40960

Used MCU Pins

mikroBUS™ mapper

Analog Output
PC4
AN
Reset
PC15
RST
SPI Chip Select
PA4
CS
SPI Clock
PA5
SCK
SPI Data OUT
PA6
MISO
SPI Data IN
PA7
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
PWM Input
PE9
PWM
Interrupt
PD0
INT
UART TX
PA2
TX
UART RX
PA3
RX
I2C Clock
PB10
SCL
I2C Data
PB11
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

Tester Click Schematic schematic

Step by step

Project assembly

PIC32MZ MXS Data Capture Board front image hardware assembly

Start by selecting your development board and Click board™. Begin with the CLICKER 4 for STM32F302VCT6 as your development board.

PIC32MZ MXS Data Capture Board front image hardware assembly
Thermo 21 Click front image hardware assembly
Thermo 21 Click complete accessories setup image hardware assembly
Board mapper by product6 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
PIC32MZ MXS Data Capture Board NECTO MCU Selection Step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto image step 11 hardware assembly

Track your results in real time

Application Output

1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support

Library Description

This library contains API for Tester Click driver.

Key functions:

  • tester_set_pin_high - This function sets the output voltage on the specified pin to high

  • tester_set_pin_low - This function sets the output voltage on the specified pin to low

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * \file 
 * \brief Tester Click example
 * 
 * # Description
 * This example showcases how to initialize, configure and use the Tester Click. It is a simple
 * GPIO Click which is used to test if all the pins on a MikroBUS are working correctly.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * This function initializes and configures the Click and logger modules.
 * 
 * ## Application Task  
 * This function sets the output on all the pins (one by one) on the left side to high, going
 * from top to bottom and then does the same with the ones on the right side, after which it 
 * sets all pins to high and after one second sets them back to low. 
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "tester.h"

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

static tester_t tester;
static log_t logger;

static digital_out_t *pin_addr[ 12 ] =
{
    &tester.mosi,    // 0 MOSI
    &tester.miso,    // 1 MISO
    &tester.sck,     // 2 SCK
    &tester.cs,      // 3 CS
    &tester.rst,     // 4 RST
    &tester.an,      // 5 AN
    &tester.pwm,     // 6 PWM
    &tester.int_pin, // 7 INT
    &tester.tx_pin,  // 8 TX
    &tester.rx_pin,  // 9 RX
    &tester.scl,     // 10 SCL
    &tester.sda      // 11 SDA
};

// ------------------------------------------------------- ADDITIONAL FUNCTIONS

static void blink ( digital_out_t *pin ) 
{
    tester_set_pin_high( pin );
    Delay_100ms( );
    tester_set_pin_low( pin );
}

static void all_on ( )
{
   int i;

   for( i = 0; i < 12; i++ )
   {
        tester_set_pin_high( pin_addr[ i ] );
   }
}

static void all_off ( )
{
   int i;

   for( i = 0; i < 12; i++ )
   {
        tester_set_pin_low( pin_addr[ i ] );
   }
}

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

void application_init ( )
{
    log_cfg_t log_cfg;
    tester_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.

    tester_cfg_setup( &cfg );
    TESTER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    tester_init( &tester, &cfg );
}

void application_task ( )
{
    int i;

    for( i = 0; i < 12; i++ )
    {
        blink( pin_addr[ i ] );
    }

    all_on( );
    Delay_1sec( );
    all_off( );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

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

Additional Support

Resources

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