7seg Click

How does it work?

7seg Click uses two seven-segment red LED displays, the JS1-5213AE from Ningbo Junsheng Electronics, driven by the SN74HC595D, an 8-bit serial-in, parallel-out shift register module from Texas Instruments. The JS1-5213AE display consists of seven LEDs arranged in a rectangular fashion, where each of the seven LEDs is called a segment because when illuminated, the segment forms part of a numerical digit (both decimal and hex) to be displayed. With dimensions of 17.5×12.4×8.4mm and a decimal point, these displays are also characterized by a wide viewing range and ultra-segment intensity. This board is suitable for numeric or hexadecimal displays, such as for a clock, timer, counter, or similar applications.

As mentioned before, this Click board™ communicates with MCU through a standard SPI interface across SN74HC595D with a maximum frequency of 5MHz. In addition to the SPI communication, the 7seg Click uses two additional pins for the direct shift register override function, and display activation routed to the RST and PWM pins of the mikroBUS™ socket. Setting the PWM pin to logic high state turns the displays ON. After that, users can see the functionality of the 7seg click by showing numbers or characters on the left and right displays.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the PWR SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. 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 7seg 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	PWM Signal
Register Override	MR	2	RST	INT	15	NC
SPI Chip Select	LT	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
SPI Data OUT	SDO	5	MISO	SCL	12	NC
SPI Data IN	SDI	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

7seg Click electrical specifications

Software Support

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

Key functions

• This function sets display state for 7seg click.

• This function writes left and right number on 7seg display.

• This function writes left and right character on 7seg display.

Example Description

Example code consist of two sections: AppInit and AppTask, and shows number or character on 7seg display.

 void application_task ( void ) 
 { 
     uint8_t counter; 

     c7seg_display_mode( &c7seg, C7SEG_DISPLAY_ON ); 
     Delay_ms ( 1000 ); 

     for ( counter = 0; counter < 9; counter ++ ) 
     { 
         c7seg_write_data_number( &c7seg, counter, counter + 1 ); 
         Delay_ms ( 1000 ); 
     } 
     Delay_ms ( 1000 ); 

     for ( counter = 65; counter < 90; counter ++ ) 
     { 
         c7seg_write_data_character( &c7seg, counter, counter + 1 ); 
         Delay_ms ( 1000 ); 
     } 
     Delay_ms ( 1000 ); 

     c7seg_display_mode( &c7seg, C7SEG_DISPLAY_OFF ); 
     Delay_ms ( 1000 ); 
 }

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.7seg

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 MikroElektronika compilers.

mikroSDK

This 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.

For more information about mikroSDK, visit the official page.