Terminal 2 Click Board™

How Does The Terminal 2 Click Board™ Work?

The Terminal 2 Click Board™ is an adapter 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 Board™, 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 mirrors 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).

The Terminal 2 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, labelled as PWR. However, the 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.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout on the Terminal 2 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin		Pin	Notes
Analog Input	AN	1	AN	PWM	16	PWM	PWM Output
Reset	RST	2	RST	INT	15	INT	Interrupt
SPI Chip Select	CS	3	CS	RX	14	TX	UART TX
SPI Clock	SCK	4	SCK	TX	13	RX	UART RX
SPI Data OUT	SDO	5	MISO	SCL	12	SCL	I2C Clock
SPI Data IN	SDI	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

ONBOARD SETTINGS AND INDICATORS

Software Support

We provide a library for the Terminal 2 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on Mikroe Github account.

Library Description

This library contains API for the Terminal 2 Click Board™ 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.

Example Description

This example demonstates the use of the Terminal 2 Click Board™ by toggling all its pins.

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: %urn", ( 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; 
     } 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on Mikroe Github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Terminal2

Additional Notes and Information

Depending on the development board you are using, you may need a 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.

MIKROSDK

The Terminal 2 Click Board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.