Intermediate
30 min

Simplify the way you present information with SC10-21SRWA and PIC18F46K22

Count in style!

BIG 7-SEG R Click with Curiosity HPC

Published Nov 01, 2023

Click board™

BIG 7-SEG R Click

Development board

Curiosity HPC

Compiler

NECTO Studio

MCU

PIC18F46K22

Our seven-segment LED display is designed to illuminate information with clarity and precision, making it the ideal choice for all your numeric readout needs

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Hardware Overview

How does it work?

BIG 7-Seg R Click is based on the SC10-21SRWA, a single-digit numeric display from Kingbright. This super bright red source color device is made with a Gallium Aluminium Arsenide red light-emitting diode. It features low current operation, high light output, excellent character appearance, and is mechanically rugged. The display works on 5V and has a common cathode as its internal design. It consists of seven red LED segments that form an 8 number and the eighth segment as a decimal point, or DP. The communication between the host MCU and the Big 7-Seg R Click is established via a 4-Wire SPI serial interface and the 8-bit

serial-IN, parallel-OUT 74HC595, a shifter register with 3-state output registers from Texas Instruments. The shift register provides a separate clock for both the shift and the storage register. In addition, you can set all shift register values to zero by applying logic LOW state on pin MR, and this function is independent of all clocks. One of the main features of the Big 7-Seg R Click is light intensity management. The light intensity can be set over the PWM pin. The SC10-21SRWA display is a 5V-only device. To work with 3.3V logic MCUs, this Click board™ features five SN74LVC1T45s, single-bit dual-supply bus transceivers with

configurable voltage translation, and 3-state outputs from Texas Instruments. These noninverting transceivers use two separate configurable power-supply rails and are designed for asynchronous communication between the two data buses. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the DATA 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.

BIG 7-SEG R Click top side image
BIG 7-SEG R Click bottom side image

Features overview

Development board

Curiosity HPC, standing for Curiosity High Pin Count (HPC) development board, supports 28- and 40-pin 8-bit PIC MCUs specially designed by Microchip for the needs of rapid development of embedded applications. This board has two unique PDIP sockets, surrounded by dual-row expansion headers, allowing connectivity to all pins on the populated PIC MCUs. It also contains a powerful onboard PICkit™ (PKOB), eliminating the need for an external programming/debugging tool, two mikroBUS™ sockets for Click board™ connectivity, a USB connector, a set of indicator LEDs, push button switches and a variable potentiometer. All

these features allow you to combine the strength of Microchip and Mikroe and create custom electronic solutions more efficiently than ever. Each part of the Curiosity HPC development board contains the components necessary for the most efficient operation of the same board. An integrated onboard PICkit™ (PKOB) allows low-voltage programming and in-circuit debugging for all supported devices. When used with the MPLAB® X Integrated Development Environment (IDE, version 3.0 or higher) or MPLAB® Xpress IDE, in-circuit debugging allows users to run, modify, and troubleshoot their custom software and hardware

quickly without the need for additional debugging tools. Besides, it includes a clean and regulated power supply block for the development board via the USB Micro-B connector, alongside all communication methods that mikroBUS™ itself supports. Curiosity HPC development board allows you to create a new application in just a few steps. Natively supported by Microchip software tools, it covers many aspects of prototyping thanks to many number of different Click boards™ (over a thousand boards), the number of which is growing daily.

Curiosity HPC double image

Microcontroller Overview

MCU Card / MCU

PIC18F46K22

Architecture

PIC

MCU Memory (KB)

64

Silicon Vendor

Microchip

Pin count

40

RAM (Bytes)

3896

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
Master Reset
RD0
RST
Data Latch
RA3
CS
SPI Clock
RB1
SCK
SPI Data OUT
RB2
MISO
SPI Data IN
RB3
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
Light Intensity Control
RC2
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Schematic

BIG 7-SEG R Click Schematic schematic

Step by step

Project assembly

Curiosity HPC front no-mcu image hardware assembly

Start by selecting your development board and Click board™. Begin with the Curiosity HPC as your development board.

Curiosity HPC front no-mcu image hardware assembly
Thermo 28 Click front image hardware assembly
MCU DIP 40 hardware assembly
Prog-cut hardware assembly
Curiosity HPC MB 1 - upright/with-background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Necto DIP image step 7 hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Track your results in real time

Application Output

After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.

Application Output Step 1

After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.

Application Output Step 3

Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.

Application Output Step 4

Software Support

Library Description

This library contains API for BIG 7-SEG R Click driver.

Key functions:

  • big7seg_display_off - Turn OFF BIG 7-SEG display

  • big7seg_write_data_number - Function write number

  • big7seg_write_data_character - Function write character

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

/*!
 * \file 
 * \brief Big7Seg Click example
 * 
 * # Description
 * This application sets seven-segment leds on the display.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Driver initializaion and turning on the display
 * by setting PWM pin to logic 1 and prepare to communcation via SPI.
 * 
 * ## Application Task  
 * This example shows functionality of the BIG 7-SEG R click,
 * shows number or character on display.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "big7seg.h"

// ------------------------------------------------------------------ VARIABLES

static big7seg_t big7seg;
static log_t logger;

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    big7seg_cfg_t cfg;

    /** 
     * 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.

    big7seg_cfg_setup( &cfg );
    BIG7SEG_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    big7seg_init( &big7seg, &cfg );

    big7seg_set7seg( &big7seg );
    Delay_100ms( );
}

void application_task ( )
{
    uint8_t counter;

    big7seg_reset7seg( &big7seg );
    big7seg_display_on( &big7seg );
    Delay_1sec( );

    big7seg_write_data( &big7seg, 0x40 );
    Delay_1sec( );
    big7seg_write_data_character( &big7seg, 'B' );
    Delay_1sec( );
    big7seg_write_data_character( &big7seg, 'I' );
    Delay_1sec( );
    big7seg_write_data_character( &big7seg, 'G' );
    Delay_1sec( );
    big7seg_write_data( &big7seg, 0x08 );
    Delay_1sec( );
    big7seg_write_data_number( &big7seg, 7 );
    Delay_1sec( );
    big7seg_write_data( &big7seg, 0x40 );
    Delay_1sec( );
    big7seg_write_data_character( &big7seg, 'S' );
    Delay_1sec( );
    big7seg_write_data_character( &big7seg, 'E' );
    Delay_1sec( );
    big7seg_write_data_character( &big7seg, 'G' );
    Delay_1sec( );
    
    big7seg_write_data( &big7seg, 0x00 );
    Delay_1sec( );
    for ( counter = 65; counter < 91; counter ++ )
    {
        big7seg_write_data_character(  &big7seg, counter );
        Delay_1sec( );
    }

    big7seg_display_off( &big7seg );
    Delay_1sec( );
}

void main ( void )
{
    application_init( );

    for ( ; ; )
    {
        application_task( );
    }
}

// ------------------------------------------------------------------------ END

Additional Support

Resources