Create a reliable and non-volatile data storage solution with M95M02-DR and PIC32MZ2048EFH100

Harnessing data with EEPROM magic!

Published Aug 23, 2023

Click board™

EEPROM 2 Click

Dev. board

Flip&Click PIC32MZ

Compiler

NECTO Studio

MCU

PIC32MZ2048EFH100

By incorporating EEPROM memory, our solution enables seamless configuration updates and calibration adjustments, enhancing the flexibility and adaptability of your systems

Hardware Overview

How does it work?

EEPROM 2 Click is based on the M95M02, a 2-Mbit serial SPI bus EEPROM from STMicroelectronics. EEPROM density of 2Mbit is expressed in bits, so exactly 2,097,152 bits are organized in units or words of 8 bits, which gives 262,144 bytes of data memory. Furthermore, the EEPROM is organized in memory pages. One page holds 256 bytes, and there are 1024 pages (1024 pages x 256 bytes = 262,144 bytes total). Having insight into how the memory cells are organized is important for Write and Erase operations. One of the key features of

the M95M02 IC is the Error Correction Code logic (ECC), which allows error correction and is done internally. Another feature of the M95M02 IC is an identification memory page, 256 bytes long, which can be used to store an ID or other sensitive data, and once written, it can be permanently locked. EEPROM 2 Click uses a standard 4-Wire SPI interface to communicate with the host MCU, supporting clock frequency of up to 5MHz. There are several instruction codes, such as Write Enable and Disable, Write and Read from memory array,

Read and Write to Status register, and so on. It also includes a write protection of the specific part or the whole memory array. 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.

Features overview

Development board

Flip&Click PIC32MZ is a compact development board designed as a complete solution that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit PIC32MZ microcontroller, the PIC32MZ2048EFH100 from Microchip, four mikroBUS™ sockets for Click board™ connectivity, two USB connectors, LED indicators, buttons, debugger/programmer connectors, and two headers compatible with Arduino-UNO pinout. Thanks to innovative manufacturing technology,

it allows you to build gadgets with unique functionalities and features quickly. Each part of the Flip&Click PIC32MZ development kit contains the components necessary for the most efficient operation of the same board. In addition, there is the possibility of choosing the Flip&Click PIC32MZ programming method, using the chipKIT bootloader (Arduino-style development environment) or our USB HID bootloader using mikroC, mikroBasic, and mikroPascal for PIC32. This kit includes a clean and regulated power supply block through the USB Type-C (USB-C) connector. All communication

methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, user-configurable buttons, and LED indicators. Flip&Click PIC32MZ development kit allows you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

Microcontroller Overview

MCU Card / MCU

Architecture

PIC32

MCU Memory (KB)

2048

Silicon Vendor

Microchip

Pin count

100

RAM (Bytes)

524288

Used MCU Pins

mikroBUS™ mapper

RST

SPI Chip Select

RA0

SPI Clock

RG6

SCK

SPI Data OUT

RC4

MISO

SPI Data IN

RB5

MOSI

Power Supply

3.3V

Ground

GND

PWM

INT

SCL

SDA

Power Supply

Ground

GND

Take a closer look

Click board™ Schematic

Step by step

Project assembly

Flip&Click PIC32MZ front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Flip&Click PIC32MZ as your development board.

GNSS2 Click front image hardware assembly

GNSS2 Click complete accessories setup image hardware assembly

Board mapper by product7 hardware assembly

Flip&Click PIC32MZ MCU step hardware assembly

Necto No Display image step 8 hardware assembly

Debug Image Necto Step hardware assembly

Software Support

Library Description

This library contains API for EEPROM 2 Click driver.

Key functions:

eeprom2_write - This function writes a single byte of data to the given memory address
eeprom2_write_bytes - This function writes bytes of data to the given memory address
eeprom2_read_bytes - This function reads bytes from the given memory address.

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 
 * \brief Eeprom2 Click example
 * 
 * # Description
 * This application demonstrates the process of writing and
 * reading of data from EEPROM.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes EEPROM 2 driver.
 * 
 * ## Application Task  
 * Writing data to EEPROM and then reading that data and writing it via UART.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "eeprom2.h"

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

static eeprom2_t eeprom2;
static log_t logger;
uint8_t text[ 7 ] = { 'M','i','k','r','o','e' };
uint8_t mem_value[ 7 ] = { 0 };

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

void application_init ( void )
{
    log_cfg_t log_cfg;
    eeprom2_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.
    eeprom2_cfg_setup( &cfg );
    EEPROM2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    eeprom2_init( &eeprom2, &cfg );
}

void application_task ( void )
{
    eeprom2_write_bytes ( &eeprom2, 0x01, text, 6 );
    log_printf ( &logger, "Writing Mikroe to EEPROM 2 Click\r\n" );
    Delay_ms ( 1000 );
    eeprom2_read_bytes ( &eeprom2, 0x01 , mem_value, 6 );
    log_printf ( &logger, "Data read: %s\r\n", mem_value );
    Delay_ms ( 1000 );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}


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