Intermediate
30 min

Keep your data protected and secure with AT25FF321A and PIC32MZ2048EFH100

A flash that never fades!

Flash 10 Click with Flip&Click PIC32MZ

Published Mar 11, 2023

Click board™

Flash 10 Click

Dev. board

Flip&Click PIC32MZ

Compiler

NECTO Studio

MCU

PIC32MZ2048EFH100

Keep data and information stored even when the power is off

A

A

Hardware Overview

How does it work?

Flash 10 Click is based on the AT25FF321A, a highly reliable serial Flash memory solution designed for use in various high-volume consumer and connected applications from Dialog Semiconductor. The AT25FF321A is organized as a 32Mbit (16x2 Mbit physical block) Flash memory ideally suited for systems where program code is shadowed from Flash memory into embedded or external RAM (code shadow) for execution and where small amounts of data are stored and updated locally in the Flash memory. The AT25FF321A specifies a minimum of 100.000 endurance cycles with data retention of a minimum of 20 years, allowing it to handle unlimited reads/writes to the memory. The AT25FF321A's erase block sizes are optimized to meet the needs of today's code and data storage applications, supporting flexible and optimized erase architecture for code and data storage

applications (4kB, 32kB, and 64kB block erase operations) and a full-chip erase feature. Optimizing the erase blocks' size can be the most efficient use of memory space. Also, the AT25FF321A contains four specialized 128-byte One-Time Programmable (OTP) security registers which can be used to store a unique device ID and locked key storage. Flash 10 Click communicates with MCU through a standard SPI interface supporting the two most common SPI modes, SPI Mode 0 and 3. Furthermore, this Click board™ provides additional hardware-controlled functions. The configurable Write Protection, marked as WP and routed on the PWM pin of the mikroBUS™ socket, protects all registers (including status and configuration) from write operations and must be held low to inhibit all the write operations to registers. When this pin is low, all memory and register write

operations are prohibited, and the address counter is not incremented. Also, it is possible to use the Reset or Hold function through the RST pin of the mikroBUS™ socket, depending on the state of the HOLD/RESET bit 7 in Status Register 3. In the case of the Hold function, this pin temporarily pauses serial communication without deselecting or resetting the device, while in the case of the Reset feature, a low logic level on the RST pin puts the AT25FF321A into a Reset state. This Click board™ can only be operated with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.

Flash 10 Click top side image
Flash 10 Click lateral side image
Flash 10 Click bottom side image

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.

Flip&Click PIC32MZ double image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC32

MCU Memory (KB)

2048

Silicon Vendor

Microchip

Pin count

100

RAM (Bytes)

524288

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
QSPI IO3 / Reset
RE2
RST
SPI Chip Select
RA0
CS
SPI Clock
RG6
SCK
QSPI IO1 / SPI Data OUT
RC4
MISO
QSPI IO0 / SPI Data IN
RB5
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
QSPI IO2 / Write Protection
RC14
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
NC
NC
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

Flash 10 Click Schematic 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.

Flip&Click PIC32MZ front image hardware assembly
GNSS2 Click front image hardware assembly
Prog-cut hardware assembly
Flip&Click PIC32MZ MB1 Access - 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
Flip&Click PIC32MZ 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 Flash 10 Click driver.

Key functions:

  • flash10_erase_memory This function erases the selected amount of memory which contains the selected address.

  • flash10_memory_write This function writes a desired number of data bytes starting from the selected memory address.

  • flash10_memory_read This function reads a desired number of data bytes starting from the selected 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 main.c
 * @brief Flash 10 Click example
 *
 * # Description
 * This example demonstrates the use of Flash 10 click board by writing specified data to
 * the memory and reading it back.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes the driver and checks the communication by reading and verifying the device ID.
 *
 * ## Application Task
 * Writes a desired number of bytes to the memory and then verifies if it is written correctly
 * by reading from the same memory location and displaying the memory content on the USB UART.
 * The whole 4KB block of memory that contains the STARTING_ADDRESS will be erased before writing data.
 *
 * @author Stefan Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "flash10.h"

#define DEMO_TEXT_MESSAGE_1         "MIKROE"
#define DEMO_TEXT_MESSAGE_2         "Flash 10 click"
#define STARTING_ADDRESS            0x012345

static flash10_t flash10;
static log_t logger;

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    flash10_cfg_t flash10_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.
    flash10_cfg_setup( &flash10_cfg );
    FLASH10_MAP_MIKROBUS( flash10_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == flash10_init( &flash10, &flash10_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( FLASH10_ERROR == flash10_check_communication ( &flash10 ) )
    {
        log_error( &logger, " Check communication." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

void application_task ( void )
{
    uint8_t data_buf[ 128 ] = { 0 };
    log_printf ( &logger, " Memory address: 0x%.6LX\r\n", ( uint32_t ) STARTING_ADDRESS );
    if ( FLASH10_OK == flash10_erase_memory ( &flash10, FLASH10_CMD_BLOCK_ERASE_4KB, STARTING_ADDRESS ) )
    {
        log_printf ( &logger, " Erase memory block (4KB)\r\n" );
    }
    memcpy ( data_buf, DEMO_TEXT_MESSAGE_1, strlen ( DEMO_TEXT_MESSAGE_1 ) );
    if ( FLASH10_OK == flash10_memory_write ( &flash10, STARTING_ADDRESS, 
                                              data_buf, sizeof ( data_buf ) ) )
    {
        log_printf ( &logger, " Write data: %s\r\n", data_buf );
        Delay_ms ( 100 );
    }
    memset ( data_buf, 0, sizeof ( data_buf ) );
    if ( FLASH10_OK == flash10_memory_read ( &flash10, STARTING_ADDRESS, 
                                             data_buf, sizeof ( data_buf ) ) )
    {
        log_printf ( &logger, " Read data: %s\r\n\n", data_buf );
        Delay_ms ( 3000 );
    }
    log_printf ( &logger, " Memory address: 0x%.6LX\r\n", ( uint32_t ) STARTING_ADDRESS );
    if ( FLASH10_OK == flash10_erase_memory ( &flash10, FLASH10_CMD_BLOCK_ERASE_4KB, STARTING_ADDRESS ) )
    {
        log_printf ( &logger, " Erase memory block (4KB)\r\n" );
    }
    memcpy ( data_buf, DEMO_TEXT_MESSAGE_2, strlen ( DEMO_TEXT_MESSAGE_2 ) );
    if ( FLASH10_OK == flash10_memory_write ( &flash10, STARTING_ADDRESS, 
                                              data_buf, sizeof ( data_buf ) ) )
    {
        log_printf ( &logger, " Write data: %s\r\n", data_buf );
        Delay_ms ( 100 );
    }
    memset ( data_buf, 0, sizeof ( data_buf ) );
    if ( FLASH10_OK == flash10_memory_read ( &flash10, STARTING_ADDRESS, 
                                             data_buf, sizeof ( data_buf ) ) )
    {
        log_printf ( &logger, " Read data: %s\r\n\n", data_buf );
        Delay_ms ( 3000 );
    }
}

void main ( void )
{
    application_init( );

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

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

Additional Support

Resources

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