Fiber Opt click

How does it work?

Fiber Opt Click is based on one IF-D91, a fiber-optic photodiode, and one IF-E97, a fiber-optic LED, both from Industrial Fiber Optics. The IF-D91 is a high-speed photodiode detector housed in a connector-less plastic fiber optic package. Its optical response extends from 400 to 1100nm, making it compatible with a wide range of visible and near-infrared LED and laser diode sources. The detector package features an internal micro-lens and a precision-molded PBT housing to ensure efficient optical coupling with standard 1000μm core 2.2mm jacketed plastic fiber cable capable of 100Mbps data rates. The IF-D91 can also be used for analog video links with bandwidths up to 70MHz.

The other precision-molded PBT housing with internal micro-lens, the IF-E97, is a high-optical-output visible red LED. The housing ensures efficient optical coupling with the same standard jacketed plastic fiber cable. The output spectrum is produced by a GaAlAs die, which peaks at 650nm, representing an optimal transmission window for PMMA plastic optical fiber. The visible red light has low attenuation in PMMA plastic fiber, aids troubleshooting installations, and is the main reason the IF-E97 achieves data rates of 1Mbps. 

This Click board™ communicates with the host MCU over selectable pins of the mikroBUS™ socket. Transmission can be selected through the TX SEL selection jumper between the UART TX pin or PWM pin of the mikroBUS™ socket, as UART is selected by default. Received data is available on the RX pin of the mikroBUS™ socket.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR 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 Fiber Opt 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	PWM	GPIO TX
	NC	2	RST	INT	15	NC
	NC	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

Fiber Opt Click electrical specifications

Software Support

We provide a library for the Fiber Opt 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), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Fiber Opt Click driver.

Key functions

• fiberopt_generic_write Generic single write function.

• fiberopt_generic_read Generic single read function.

Example Description

This example demonstrates the use of an Fiber Opt click board by showing the communication between the two click boards.

 void application_task ( void ) 
 { 
 #ifdef DEMO_APP_TRANSMITTER 
     fiberopt_generic_write( &fiberopt, DEMO_TEXT_MESSAGE, strlen( DEMO_TEXT_MESSAGE ) ); 
     log_printf( &logger, "%s", ( char * ) DEMO_TEXT_MESSAGE ); 
     Delay_ms( 1000 );  
 #else 
     uint8_t rx_byte = 0; 
     if ( 1 == fiberopt_generic_read( &fiberopt, &rx_byte, 1 ) ) 
     { 
        log_printf( &logger, "%c", rx_byte ); 
     } 
 #endif 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio 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.FiberOpt

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.