Opto 7 Click

How does it work?

Opto 7 Click is based on two ISOM8710s, high-speed single-channel opto-emulators from Texas Instruments. It can transmit data rates of up to 25Mbps and can output 3.3V and 5V signals with a CMOS-compatible output. Compared to an optocoupler, the ISOM7810 has a high common mode transient immunity, low propagation delay, small pulse with distortion, low power consumption, and more. Opto 7 Click is equipped with two of those opto-emulators, for receiving and transmitting data. The external power supply can be connected to a VCC2 terminal and must be 3.3V or 5V. The three-pin terminal is used to connect input and output data lines, along with the common ground.

Opto 7 Click can use general-purpose IO to communicate with the host MCU over the GP1 and GP2 pins. It can also be used for a standard UART communication isolation with commonly used UART RX and TX pins. The selection can be made over the OUT SEL and IN SEL jumpers. Both should be in a proper position for the communication to work.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. 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.

Specifications

Pinout diagram

This table shows how the pinout on Opto 7 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	GP1	General-Purpose I/O
	NC	2	RST	INT	15	GP2	General-Purpose I/O
ID COMM	CS	3	CS	RX	14	TX	UART TX
	NC	4	SCK	TX	13	RX	UART RX
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Opto 7 Click electrical specifications

Software Support

We provide a library for the Opto 7 Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE 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 Opto 7 Click driver.

Key functions

• opto7_generic_write Opto 7 data writing function.

• opto7_set_gp1_pin Opto 7 set GP1 pin function.

• opto7_get_gp2_pin Opto 7 get GP2 pin function.

Example Description

This example demonstrates the use of Opto 7 Click board™ by processing the incoming data and displaying them on the USB UART.

void application_task ( void )  
 { 
 #if ( DEMO_EXAMPLE == EXAMPLE_GPIO ) 
     log_printf( &logger, " GP1 pin state HIGH rn" ); 
     opto7_set_gp1_pin( &opto7, OPTO7_PIN_STATE_HIGH ); 
      if ( OPTO7_PIN_STATE_HIGH == opto7_get_gp2_pin( &opto7 ) ) 
     { 
         log_printf( &logger, " GP2 pin state HIGH rn" ); 
     } 
     else 
     { 
         log_printf( &logger, " GP2 pin state LOW rn" ); 
     } 
     log_printf( &logger, "- - - - - - - - - - - -rn" ); 
     Delay_ms( 5000 ); 

     log_printf( &logger, " GP1 pin state LOW rn" ); 
     opto7_set_gp1_pin( &opto7, OPTO7_PIN_STATE_LOW ); 
     if ( OPTO7_PIN_STATE_HIGH == opto7_get_gp2_pin( &opto7 ) ) 
     { 
         log_printf( &logger, " GP2 pin state HIGH rn" ); 
     } 
     else 
     { 
         log_printf( &logger, " GP2 pin state LOW rn" ); 
     } 
     log_printf( &logger, "- - - - - - - - - - - -rn" ); 
     Delay_ms( 5000 ); 
 #else 
 #if defined TRANSMITTER 
     log_printf( &logger, " Message sent! rn" ); 
     opto7_generic_write( &opto7, TX_MESSAGE, strlen( TX_MESSAGE ) ); 
     Delay_ms( 2000 ); 
 #else 
     if ( OPTO7_OK == opto7_process( &opto7 ) )  
     { 
         opto7_log_app_buf( ); 
         opto7_clear_app_buf( ); 
     } 
 #endif 

 #endif 
 }

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.Opto7

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 MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE 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.

For more information about mikroSDK, visit the official page.