Intermediate
30 min

Preserve user settings and preferences with DS28EC20 and ATmega328P

Future-proofing solutions with EEPROM innovation

EEPROM 6 Click with Arduino UNO Rev3

Published Feb 14, 2024

Click board™

EEPROM 6 Click

Dev. board

Arduino UNO Rev3

Compiler

NECTO Studio

MCU

ATmega328P

Through the strategic use of EEPROM memory, our solution addresses the challenges of data persistence and management, enabling you to focus on innovation and growth

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Hardware Overview

How does it work?

EEPROM 6 Click is based on the DS28EC20, a 20Kb data EEPROM with a fully featured 1-Wire interface in a single chip from Analog Devices. The memory is organized as 80 pages of 256 bits each. In addition, the device has one page for control functions such as permanent write protection and EPROM-Emulation mode for individual 2048-bit (8-page) memory blocks. A volatile 256-bit memory page called the scratchpad acts as a buffer when writing data to the EEPROM to ensure data integrity. Data is first written to the scratchpad, from which it can be read back for verification before transferring it to the EEPROM. Each DS28EC20 has its own unalterable and unique 64-bit registration number.

The registration number guarantees unique identification and addresses the device in a multidrop 1-Wire net environment. In addition to the EEPROM, the device has a 32-byte volatile scratchpad. Writes to the EEPROM array are a two-step process. First, data is written to the scratchpad and then copied into the main array. The user can verify the data in the scratchpad before copying. The EEPROM 6 Click communicates with MCU using the 1-Wire interface, which supports a Standard and Overdrive communication speed of 15.4kbps (max) and 90kbps (max). If not explicitly set into the Overdrive mode, the DS28EC20 communicates at Standard speed. The 1-Wire communication line is

routed to the SMD jumper labeled GP SEL, which allows routing of the 1-Wire communication either to the PWM pin or the AN pin of the mikroBUS™ socket. These pins are labeled GP0 and GP1, respectively, the same as the SMD jumper positions, making the selection of the desired pin simple and straightforward. 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.

EEPROM 6 Click top side image
EEPROM 6 Click bottom side image

Features overview

Development board

Arduino UNO is a versatile microcontroller board built around the ATmega328P chip. It offers extensive connectivity options for various projects, featuring 14 digital input/output pins, six of which are PWM-capable, along with six analog inputs. Its core components include a 16MHz ceramic resonator, a USB connection, a power jack, an

ICSP header, and a reset button, providing everything necessary to power and program the board. The Uno is ready to go, whether connected to a computer via USB or powered by an AC-to-DC adapter or battery. As the first USB Arduino board, it serves as the benchmark for the Arduino platform, with "Uno" symbolizing its status as the

first in a series. This name choice, meaning "one" in Italian, commemorates the launch of Arduino Software (IDE) 1.0. Initially introduced alongside version 1.0 of the Arduino Software (IDE), the Uno has since become the foundational model for subsequent Arduino releases, embodying the platform's evolution.

Arduino UNO Rev3 double side image

Microcontroller Overview

MCU Card / MCU

default

Architecture

AVR

MCU Memory (KB)

32

Silicon Vendor

Microchip

Pin count

28

RAM (Bytes)

2048

You complete me!

Accessories

Click Shield for Arduino UNO has two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the Arduino UNO board without effort. The Arduino Uno, a microcontroller board based on the ATmega328P, provides an affordable and flexible way for users to try out new concepts and build prototypes with the ATmega328P microcontroller from various combinations of performance, power consumption, and features. The Arduino Uno has 14 digital input/output pins (of which six can be used as PWM outputs), six analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and reset button. Most of the ATmega328P microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the Arduino UNO board with our Click Shield for Arduino UNO, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.

Click Shield for Arduino UNO accessories 1 image

Used MCU Pins

mikroBUS™ mapper

1-Wire Data IN/OUT
PC0
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
1-Wire Data IN/OUT
PD6
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

Click board™ Schematic

EEPROM 6 Click Schematic schematic

Step by step

Project assembly

Click Shield for Arduino UNO front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Arduino UNO Rev3 as your development board.

Click Shield for Arduino UNO front image hardware assembly
Arduino UNO Rev3 front image hardware assembly
Barometer 13 Click front image hardware assembly
Prog-cut hardware assembly
Arduino UNO Rev3 MB 1 - upright/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
Arduino UNO MCU Step 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

1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support

Library Description

This library contains API for EEPROM 6 Click driver.

Key functions:

  • eprom6_write_mem - This function writes a sequential data starting of the targeted 16b register address of the targeted 16-bit register address of the DS28EC20

  • eeprom6_read_mem - This function reads a sequential data starting from the targeted 16-bit register address of the DS28EC20.

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * @file main.c
 * @brief EEPROM 6 Click Example.
 *
 * # Description
 * This example demonstrates the use of EEPROM6 click board by writing 
 * string to a memory at some specific location and then reading it back.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes the driver and performs the click default configuration.
 *
 * ## Application Task
 * This example shows capabilities of EEPROM 6 Click board by writting a string 
 * into memory location from a specific address, and then reading it back every 5 seconds.
 *
 * @author Nikola Citakovic
 *
 */

#include "board.h"
#include "log.h"
#include "eeprom6.h"

static eeprom6_t eeprom6;
static log_t logger;

#define EEPROM6_DEMO_TEXT       "MikroE - EEPROM 6 click board"
#define EEPROM6_TEXT_ADDRESS    0x0000

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    eeprom6_cfg_t eeprom6_cfg;  /**< Click config object. */

    /** 
     * 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.
    eeprom6_cfg_setup( &eeprom6_cfg );
    EEPROM6_MAP_MIKROBUS( eeprom6_cfg, MIKROBUS_1 );
    if ( ONE_WIRE_ERROR == eeprom6_init( &eeprom6, &eeprom6_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( EEPROM6_ERROR == eeprom6_default_cfg ( &eeprom6 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{        
    log_printf( &logger, "Writing \"%s\" to memory address 0x%.4X\r\n", 
                ( uint8_t * ) EEPROM6_DEMO_TEXT, EEPROM6_TEXT_ADDRESS );
    eeprom6_write_mem( &eeprom6, EEPROM6_TEXT_ADDRESS, ( char * ) EEPROM6_DEMO_TEXT,
                       strlen ( EEPROM6_DEMO_TEXT ) );
    Delay_ms( 100 );    
    uint8_t read_buf[ 100 ] = { 0 };
    eeprom6_read_mem ( &eeprom6, EEPROM6_TEXT_ADDRESS,read_buf,
                       strlen ( EEPROM6_DEMO_TEXT ) );
    log_printf( &logger, "Reading \"%s\" from memory address 0x%.4X\r\n\n",
                read_buf, ( uint16_t ) EEPROM6_TEXT_ADDRESS );
    Delay_ms( 5000 );
}

void main ( void ) 
{
    application_init( );

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

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

Additional Support

Resources

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