Get easy access to mikroBUS™ signals, allowing you to tinker and experiment with your projects effortlessly.
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Hardware Overview
How does it work?
Terminal 2 Click is an adapter Click board™ used as a mikroBUS™ socket expansion board. This Click board™ provides an easy and elegant solution for adding the external connection capability to the Click board™ and can be connected to the mikroBUS™ socket like any other Click board™. On the central area of the Terminal 2 Click, two 9-position 2.54mm pitch terminal blocks are placed. Each of the terminal pins corresponds to a pin on the mikroBUS™ socket. Thanks to these terminals, the connection
with the Click board™ remains firm and stable, retaining a perfect connection quality at all times. Lines of the mikroBUS™ socket to which Terminal 2 Click is attached are shared through the onboard connectors, which mirror the connected mikroBUS™ socket pins. Therefore, care should be taken when working with the Terminal 2 Click and connecting an external device to it because the same pins on the mikroBUS™ are shared, either for the communication (SPI, UART, I2C) or for some other purpose (RST, INT, or other pins used as
GPIO). This Click board™ can operate with both 3.3V and 5V logic voltage levels. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. A green LED visually detects the presence of an active power supply labeled as PWR. 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.
Features overview
Development board
Arduino UNO is a versatile microcontroller board built around the ATmega328P chip. It offers extensive connectivity options for various projects, featuring 14 digital input/output pins, six of which are PWM-capable, along with six analog inputs. Its core components include a 16MHz ceramic resonator, a USB connection, a power jack, an
ICSP header, and a reset button, providing everything necessary to power and program the board. The Uno is ready to go, whether connected to a computer via USB or powered by an AC-to-DC adapter or battery. As the first USB Arduino board, it serves as the benchmark for the Arduino platform, with "Uno" symbolizing its status as the
first in a series. This name choice, meaning "one" in Italian, commemorates the launch of Arduino Software (IDE) 1.0. Initially introduced alongside version 1.0 of the Arduino Software (IDE), the Uno has since become the foundational model for subsequent Arduino releases, embodying the platform's evolution.
Microcontroller Overview
MCU Card / MCU

Architecture
AVR
MCU Memory (KB)
32
Silicon Vendor
Microchip
Pin count
28
RAM (Bytes)
2048
You complete me!
Accessories
Click Shield for Arduino UNO has two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the Arduino UNO board without effort. The Arduino Uno, a microcontroller board based on the ATmega328P, provides an affordable and flexible way for users to try out new concepts and build prototypes with the ATmega328P microcontroller from various combinations of performance, power consumption, and features. The Arduino Uno has 14 digital input/output pins (of which six can be used as PWM outputs), six analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and reset button. Most of the ATmega328P microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the Arduino UNO board with our Click Shield for Arduino UNO, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic

Step by step
Project 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 Terminal 2 Click driver.
Key functions:
terminal2_set_all_pins_high
- This function sets all terminal pins to high logic level.terminal2_set_all_pins_low
- This function sets all terminal pins to low logic level.terminal2_toggle_pin
- This function toggles the specified pin logic level.
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 main.c
* @brief Terminal 2 Click Example.
*
* # Description
* This example demonstates the use of Terminal 2 Click board by toggling all its pins.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and logger and sets all pins to low logic state.
*
* ## Application Task
* Toggles all pins from mikroBUS one by one in the span of 1 second between each pin toggle.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "terminal2.h"
static terminal2_t terminal2; /**< Terminal 2 Click driver object. */
static log_t logger; /**< Logger object. */
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
terminal2_cfg_t terminal2_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.
terminal2_cfg_setup( &terminal2_cfg );
TERMINAL2_MAP_MIKROBUS( terminal2_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == terminal2_init( &terminal2, &terminal2_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
terminal2_set_all_pins_low ( &terminal2 );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
/**< Array of pins object addresses. */
static digital_out_t *pin_addr[ 12 ] =
{
&terminal2.mosi, // 0 MOSI
&terminal2.miso, // 1 MISO
&terminal2.sck, // 2 SCK
&terminal2.cs, // 3 CS
&terminal2.rst, // 4 RST
&terminal2.an, // 5 AN
&terminal2.pwm, // 6 PWM
&terminal2.int_pin, // 7 INT
&terminal2.tx_pin, // 8 TX
&terminal2.rx_pin, // 9 RX
&terminal2.scl, // 10 SCL
&terminal2.sda // 11 SDA
};
static uint8_t pin_num = 0;
log_printf( &logger, " Toggling pin: %u\r\n", ( uint16_t ) pin_num );
terminal2_toggle_pin ( pin_addr[ pin_num ] );
Delay_ms ( 1000 );
terminal2_toggle_pin ( pin_addr[ pin_num ] );
pin_num++;
if ( 12 == pin_num )
{
pin_num = 0;
}
}
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
Category:Adapter