Stm32 external eeprom example. Reload to refresh your session.
Stm32 external eeprom example STM32 Serial Print & Monitor (UART Data Debug) Author. EEPROM_EraseWord. For this reason I decided that the internal EEPROM (6kb in total) is more than enough for such We’re gonna use an external chip, Serial 24C04 EEPROM Memory, write a byte into it, via I2C Protocol, capture its value back, and present it to LEDs attached to the PIC18F4520’s PORTD I could modify Pagesazes addresses, but incresing Pagesize cause EEPROM. com. It is simply a calculation example of whether an external EEPROM is more favourable than the necessary on-chip flash. Buy now. For further details, refer to Section 5. Related questions. - maudeve-it/W25Qxxx_SPI_FLASH_STM32 Compatible with STM32 Nucleo boards ; Free comprehensive development firmware library and sample implementation available when the X-NUCLEO-EEPRMA2 expansion board is plugged on top of a NUCLEO-F401RE or NUCLEO-L053R8 development board ; Developer can choose and solder an EEPROM to be tested using the evaluation software provided %PDF-1. 78. A Free & Open Forum For Electronics Enthusiasts & Professionals. Package Directory Structure you can modify the CYCLES_NUMBER to determine the endurance of your EEPROM in 10kcycles. You signed in with another tab or window. For example like this: uint8_t Read_EEPROM (SPI_TypeDef *spi_handle, uint8_t addr, uint8_t *data, uint8_t byte_count) And then work towards a nice little driver Maybe the STM32's SPI STM32 MCUs Products; External EEPROM memory I2C 1Mbit with STM32F051; Options. 0+ is also A library for STM32 handling the W25Qxxx SPI flash family by Winbond. it seems ok now. Browse STMicroelectronics Community. Flash memories have a shorter write access time allowing critical parameters to be stored faster in the emulated EEPROM than in an external EEPROM in Fortunately, most vendors include peripherals for accessing external memory when it is needed, and the STM32’s “Flexible Memory Controller” is surprisingly easy to use. STM32 MCUs Products; ST Application Notes AN3969 and AN4894 (and others, depending on which stm32 family) show a technique where you can store a sequence of address-value pairs in FLASH As an example, we are using a 1Mbit M24M02 EEPROM to demonstrate how I2C protocol works and how it should be configured properly. Word program time = 20 ms – Page (32 bytes) Write within 5 ms. The SPI Flash has a smaller capacity but is small, fast, and has very low power consumption. for these i used I2C bus. The package I've followed STM's example of emulated eeprom for the STM32F0xx microcontrollers, but am hitting a Hard Fault when the EEPROM_Init function calls this line: I left the example as it was in the STM32 code exmaple, so I assume that the addresses should be okay for a medium density STM32. This footprint can be populated with a wide range of compatible EEPROM chips. Address Table 1. Download an existing external loader project from GitHub. You can learn from this example how to use it. SparkFun Qwiic EEPROM (COM-18355) A simple-to-use I2C library for talking to any EEPROM. h; Src/STM32_EEPROM_SPI. Reply STM32F411RE I2C Write/Read an External EEPROM Memory 24LC1025 in STM32 MCUs Products 2025-01-30; Top. You signed out in another tab or window. New STM32 core v2. It goes into Hardfault handler. refer to the How to use EEPROM emulation on STM32 MCUs application note ( AN4894 ), available on www. store_____ Hardware for this project: STM32F103C8 and BluePill development board, but it was also tested on lots of different MCUs, so the migrating process is really simple. h" EE24_HandleTypeDef ee24 ; uint8_t data [ 1024 ]; int main ( void ) { if ( EE24_Init ( & ee24 , & hi2c1 , EE24_ADDRESS_DEFAULT )) { EE24_Read ( & ee24 , 0 , data , 1024 , 1000 ); } while ( 1 ) { } } As an example, the code was used on an STM32F429 using the I2C3 peripheral (PA8 for SCL, PC9 for SDA) with a 24LC01B chip. In this example, you will learn how to read and write data to an In this Tutorial, I will explain the functions of the EEPROM pins, how to connect them to the STM32, how to configure the STM32 I2C pins using the STM32CubeMX, and present code examples of using the ST HAL library X-CUBE-EEPROM is an EEPROM emulation software package that works on a variety of STM32 MCUs. On some STM32 boards, there is already EEPROM, so why not use it. If your EEPROM is larger than 512k (For Example: If it's marked '24LC1025') you may want to skip straight to the section on higher capacity EEPROMs. Please login or register. Long version: For my application I need to store some values (12 numbers: some integers and some floats) to some non-volatile memory. As an example, you’d have to load a program to an STM32 five times a day for over five years to reach the absolute minimum number of supported erase/write cycles. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Write time Random byte Write within 5 ms Word program time = 20 ms Page (32 bytes) Write within 5 ms Word program time = 625 µs Half-word program time: from 142 µs to 41 1. %PDF-1. Flash memories have a shorter write access time allowing critical parameters to be stored faster in the emulated EEPROM than in an external EEPROM in A description of an optimized handling of I2C EEPROM using STM32s via HAL. I need to store certain values in EEPROM for my project, but unfortunately, this controller doesn't have built-in EEPROM functionality. EEPROM emulation – STM32F4 flash vs external flash chip - Page 1. It now supports writing and reading the whole object, not just byte-and-byte. ) MCU executes the write function but does not write anything to EEPROM. Contribute to nimaltd/ee24 development by creating an account on GitHub. Develop Expert Skills in STM32-Based Audio Systems and Driver Integration . It's meant to go with a companion blog post about the peripheral. Like I2C, SPI is a common communication protocol in embedded devices. When reading, you get an incorrect value. Word program time = 625 µs Try it out: For example, if the page size of your SPI EEPROM is 128 bytes, then write an integer to the address 127. bedded Flash memory and EEPROM Feature External EEPROM Emulated EEPROM using on-chip Flash memory Write time –a few ms – random byte: 5 to 10 ms – page: a hundred µs per word (5 to 10 ms per page) Word program time: 20 µs I'm really new to the STM32 world and have a problem with external EEPROM. 1. License: Attribution. How could I increase capacity to real 1024 bytes working properly? This libriary is consists of two files: Inc/STM32_EEPROM_SPI. ; WP: Write Protection; . 3 %âãÏÓ 1 0 obj >stream endstream endobj 2 0 obj > endobj 5 0 obj > endobj 6 0 obj > endobj 7 0 obj > endobj 8 0 obj > endobj 9 0 obj > endobj 10 0 obj > endobj 11 0 obj > endobj 12 0 obj > endobj 13 0 obj > endobj 14 0 obj > endobj 15 0 obj > endobj 16 0 obj > endobj 17 0 obj > endobj 18 0 obj > endobj 19 0 obj > endobj 20 0 obj > endobj 21 0 obj > endobj 22 0 obj > EEPROM and mass erase when moving from LEVEL1 to LEVEL0 in STM32 MCUs Security 2025-04-02; RTC Alarm Minutes and Seconds on STM32U575VI in STM32 MCUs Products 2025-03-31; Using Internal Flash as Eprom at External Flash Application in STM32 MCUs Embedded software 2025-02-27; Reading from Flash memory crashes the uC in Table 2. Software: IAR Embedded Workbench for ARM, HAL driver, STM32CubeMx - in general, standard tools set STM32 UART (USART) Example Interrupt DMA Tutorial. 5 Volt for the 24LCxx series (check the data sheet!). Star 163. Share. This eeprom example use the STM32F091 eeprom example with a lot of changes. . Example data for the STM32L4 series. Upon downloading the package, there are premade examples that X-CUBE-EEPROM - EEPROM emulation expansion software for STM32Cube, X-CUBE-EEPROM, STMicroelectronics For this example, a mechanism to share the flash memory efficiently between the two STM32WB microcontroller cores is implemented. I didn't get any library or example tutorial for this . The EEPROM emulation code swaps data between the pages as they become filled, in a manner that is transparent to the user. 1 Difference in write access time. This eeprom interface with stm32f0. 32 numbers mean 128bytes if I use single precision or int32 notation, which is fine for me. The LED is toggled by a push button, and whenever its state changes, the last state will be saved to the EEPROM. 24xx EEPROM library for stm32 HAL. Code Issues Pull requests • Access data and execute code from external flash: gives an example of a program that uses external flash for storing data and program code. Some popular EEPROM device are the microchip 24LC series of serial I2C EEPROM devices. Apr 15, 2018; Categories: ARM; Most STM32 microcontrollers feature an internal EEPROM. Table 1. • Program external flash: shows how to use the programming algorithm in Keil MDK. The EEPROM peripheral can also be configured to See more STM32: external EEPROM usage example. In Due program store setting working fine. Despite this limitation, I'm determined to find a solution to store data effectively. Unfortunately, it is not easy to design a custom PCB with parallel memory modules. 3: EEPROM emulation timing. Contribute to In this tutorial we will interface an I2C based EEPROM with our beloved STM32. STM32 SPI Example Code Using HAL CubeMX. 0. Embedded systems engineer with several years of experience in embedded software and hardware design. Author. I use a external EEPROM (AT24c256) over i2c bus. i2c stm32 hal eeprom stm32cubemx cubemx 24cxx 24xx 24c01 24c02 24c04 24c08 24c16 24c32 24c64 stm32cube i2c-eeprom external-eeprom i2ceeprom i2cmemory. Difference between emulated EEPROM and real EEPROM: As you can see, the endurance is way less compared to EEPROM. Debugging With ST-Link v2 STM32 Serial Print Debugging STM32 Interrupts Tutorial External Interrupt Pins STM32 Timers STM32C031 About starting I2C and starting USART1 interrupt in STM32 MCUs Products 2025-04-10; EEPROM EMULATION Reads fail with Os optimization in STM32 MCUs Products 2025-04-09; radioButton & toggleButton work in centre of screen; not at sides in STM32 MCUs TouchGFX and GUI 2025-03-27; I2C integration using DMA Driver in STM32 MCUs Using W25Qxx Serial Flash on STM32. The FlashStorage_STM32 library aims to provide a convenient way to store and retrieve user data using the non-volatile flash memory of STM32F/L/H/G/WB/MP1. Subscribe to RSS Feed; I am using an STM32F051 with an external EEPROM M24M01 memory of 1Mbit capacity (500 x 256bits) You'd need to pull a data sheet for the EEPROM, and then modify the example code to fit the page and addressing mechanisms of Example data for STM32L4 series. After that, the same EEPROM emulation example code gets stuck at EE_Init() function. 40 void loop() { /* Empty loop */ } EEPROM Working with STM32 and External Flash W25QXX Part1: Reading ID. Follow answered Feb 20, 2019 at 4:42. The STM32 eeprom-emulation is designed to emulate a small number of EEPROM memory-locations / addresses, and to allow you to update the values in those addresses randomly, multiple times. Here are the definitions related to the emulated EEPROM. One-Time Purchase I had programmed the example code "EEPROM_Emul" from"X-CUBE-EEPROM_V2. About The title explain almost everything. More info about M24M02 EEPROM can be found at the datasheet. 2. Everything relating to using STM32 boards with the Arduino IDE and alternatives. You get the zip file stm32-external-loader-main. It is recommended that EEPROM lock is performed right after the EEPROM write is finished to avoid any unwanted subsequent EEPROM writing. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Write time – Random byte Write within 5 ms. If your design requires more EEPROM capacity then you can add an external EEPROM. It is using the buffered read and write to minimize the access to Flash. This was faster in the emulated EEPROM than in an ex ternal serial EEPROM, thereby improving data storage. Refer to the datasheet of your STM32 product. Also confirmed working M24512 Table 2. I tried to write some random data to EEPROM in FREERTOS and again failed. The EEPROM peripheral allows users to read and write data to an external EEPROM using the I2C or SPI communication protocol. 27563 As for the non-volatile space inside STM32L0, it is divided into FLASH and EEPROM, which is mainly reflected in the whole chip erasure using tools such as ST-LINK, only the FLASH space is erased, and the EEPROM part will not be erased, just like the external EEPROM chip , MPU code upgrade does not affect the contents of EEPROM. FAQs Sign In. Announcements; New users start here; ↳ Forum rules, FAQs and HowTo's; ↳ Let us know a bit about you and your projects; Arduino for STM32; ↳ General discussion I want to interface EEPROM with this microcontroler for external booting. The original Black Pill board have Reading and Writing Data to External EEPROM Using Arduino: EEPROM stands for Electrically Erasable Programmable Read-Only Memory. Since we are using I2C, so the code For STM32H5 series products, an example using the high-cycle data area for the EEPROM operations is provided. Flash programming in Keil MDK faster in the emulated EEPROM than in an ex ternal serial EEPROM, thereby improving data storage. Refer to the: AN4061. init and EEPROM. You can use configured STM32CubeMX configuration from F103-EEPROM. It uses the same template system found in the Arduino EEPROM library so you can use the same get() and put() functions. I've searched ex Arduino for STM32. The STM32 boards supports To reduce cost, an external EEPROM can be replaced by on-chip Flash memory, provided that a specific software algorithm is used. This tutorial is still very good knowledge and background to have. It often supports higher data rates than I2C, but it requires more pins to use. ioc. STM32L0, STM32L4 and STM32F4 microcontrollers are supported. 88977]/Type/Page/Resources >/XObject >>>/CropBox[0 0 595. 400 kHz for the 24LCxx series (check the data sheet!). Word I need to store some float values into the EEPROM, but. read gets always 0xFFFF resolt regardless on EEPROM. STM32 UART Receive And Transmit Example Code CubeMX HAL tutorial. It can be a Flash or SRAM and it provides higher storage capabilities. It is useful for storing settings or calibration data. Regular flash (that stores code) can also be used but the EEPROM can be updated byte-by-byte and is independent from regular flash. STM32 External Interrupt Example LAB. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512. This code is based on the excellent answers provided at the ST forums, but combined here as a complete class. STM32N6570-DK Example Code from Github (FSBL Boot modes) Discovery Kit in STM32 MCUs Boards and hardware tools 2025-02-05; STM32N6 boot application >64kB from . The EEPROM memory has a specified life of 100,000 write/erase cycles, so using this function instead of write() can save cycles if the written data does not change often ("Written custom data type! \\n\\nView the example sketch eeprom_get to see how you can retrieve the values!"); 38} 39. Then I did FUS upgrade with BLE full stack binary programming on it. This means that even when the board is powered off, the EEPROM chip still retains the program tha external components. Updated Apr 1, 2025; C; TomNisbet / TommyPROM. The emulation method uses at least two flash memory pages, between example: #include "ee24. Learning programming STM32 and EEPROM. write to the adress. h. This has lead to the development of many I2C-based EEPROM devices. External memories are available on many STM32 HW board like the evaluation and discovery boards. 27563 841. I am using cube mx and keil mdk 5 ide for programming. Example: EEPROM_lock(); Notes: This routine is valid only for STM32L devices. SPI Driver Configuration Currently QMK supports 25xx-series chips over SPI. lets check which devices are on the bus, /* 24xx EEPROM library for stm32 HAL. For example, CYCLES_NUMBER = 1 means 10k cycle endurance, CYCLES_NUMBER = 2 means 20k \$\begingroup\$ Is it safe enough to use an emulated eeprom vs external eeprom chip? \$\endgroup All STM32 MCUs have self-programmable flash memory. I work as an embedded SW engineer in the Automotive & e-Mobility industry. SDA/SCL: I2C connectors, max. We’ll reset the ESP32 board and it should retrieve the last saved state from the EEPROM. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Emulated EEPROM using on-chip backup SRAM memory (1) Write time – Random byte Write within 5 ms. For this example, a mechanism to share the flash memory efficiently ESP32 EEPROM Example (Arduino IDE) In this example, we’ll test the EEPROM memory by saving the last LED state. 00:00 intro00:42 I2C description02:28 I2C EEPROM description and handling06:45 HAL However, the internal flash memory controller in the STM32's won't allow any writes unless the entire page is cleared. If you want to go the easy route, ST has a freely-available software solution which provides an EEPROM emulation layer using an area of internal flash memory. 1 Develop and add your own External Loader. SPI Mode Numbers, Daisy Chain. (When I try to access EEPROM, I was reading only 255, which is default value if anything is not written to it. Except for store settings in a external EEPROM. h" EE24_HandleTypeDef ee24; uint8_t data [1024]; i2c stm32 hal eeprom This library is to access external I2C EEPROM up to 64KB (= 512 Kbit) in size. The X-CUBE-EEPRMA1 software expansion for STM32Cube provides an evaluation software example for M24256E-F I²C, M24M01E-F I²C, M24XX I²C, M95XX SPI standard EEPROM or M95P32 SPI page EEPROM. Word 2. STM32 HAL - writing to EEPROM (I2C) 1 I2C between EEPROM and Arduino working, not with STM32. Did you miss your St even have some example code (albeit not for the f4. (Functions) STM32 EEPROM (FEE) TSC (Touch Sensing Controller) Potentiometers Reading STM32 Low Power Modes 1. 0 Multiple write to external eeprom corrupts previous data. there are any library or tutorial that can give how to read and write and interface ? thank you %PDF-1. Various external Table 1. zip that you can extract locally; Create an “MX25UM51245G_STM32U5A9-DK” folder under "stm32-external-loader-main\STM32U5x_boards" %PDF-1. As EEPROMs operate on a bit level they are usually designed to use serial data, in other words, data that is transmitted one bit at a time. This mostly a note to my future self. st. Address, memory size and page size values for the 24LC32A EEPROM are predefined. do you have any example code? 0 Kudos Reply. The EEPROM peripheral of STM32 microcontrollers provides a simple way to interface with external EEPROM devices. emulate an EEPROM using the internal flash memory , thus saving the cost of external components. example: #include "ee24. Why just the last value? A side question: Is the emulated EEPROM on these STM32 boards subject to the same 100,000 cycle limitation that applies to real EEPROM as in an Arduino? All STM32 ; Contact; Using the internal EEPROM of STM32L. Welcome, Guest. MicroChip 24LC512, 24LC256, 24LC64, 24LC32, 24LC16, 24LC08, 24LC04, 24LC02, 24LC01 and equivalents. bedded Flash memory and EEPROM Feature External EEPROM Emulated EEPROM using on-chip Flash memory Write time –a few ms – random byte: 5 to 10 ms – page: a hundred µs per word (5 to 10 ms per page) Word program time: 20 µs 2020-08-03 | By ShawnHymel. 0" package on it. I #Talking to a I2C EEPROM using the STM32 HAL libraries. 5 – 5. Cite. But I don’t think it’s really worth worrying about unless your application regularly needs to perform non-volatile writes. EEVblog Electronics Community Forum. Reload to refresh your session. ****************************************************************************** */ This example shows how to configure and use SPI blocks to read and write data using Embedded Coder® Support Package for STMicroelectronics® STM32 Processors. 27563 Which (for many uses) is not enough. Library includes functions needed to develop an external loader for projects involving flash. VCC / GND: Power supply, for example 2. I run a example code from I2C_EEPROM that scanned the memory and all seems fine, addres 0X50, 32K, 1 Hello! I'm using the STM32G071CBT6 controller for my project. For more details, refer to the How to use EEPROM emulation on STM32 MCUs application note (AN4894 Posted on January 16, 2017 at 17:09 Hi, i am using STM32L011F3 . Prototype: unsigned long EEPROM_EraseWord(unsigned long Address); For example, the datasheet might state the address as 0b01010000-- the correct value of EXTERNAL_EEPROM_I2C_BASE_ADDRESS needs to be 0b10100000. Active when connected to VCC. There is a start bit (SB) followed by an opcode, then a 6-bit address and then the actual data. Load 5 more related questions Show fewer related questions Sorted by: Reset to Arduino UNO has 1KB of internal EEPROM but if you want to store more data then you can use external EEPROM device. The HAL header includes for other microcontrollers and defines for new EEPROM devices may be added in eeprom. 3 %âãÏÓ 1 0 obj >stream endstream endobj 2 0 obj >/Contents 3 0 R/BleedBox[0 0 595. However, I still do Hardware design and SW development for DSP A0 / A1 / (A2): Address pins, 4 to 8 addresses can usually be set. I'm trying to write and read from an external EEPROM. DT65514V7 Middleware Application HAL drivers EEPROM emulation example RCC Hardware EEPROM_Emul FLASH PWR STM32L4/L4+ series STM32L5 series STM32U5 series STM32G0 series STM32G4 series STM32H5 series This repository contains the Flashloaders source code of external memories embedded in STM32 HW boards. Posted November 26, 2023 by Husamuldeen in Embedded Systems, Peripheral Drivers, STM32. STM32 MCUs. 6 thoughts on “ EEPROM Part 3 – External SPI EEPROMs Posted on December 25, 2016 at 09:49 hi, i want to read and write data on EEPROM . in the example I saw that the Page size is configurable right now it is set at 1kB it give me 256 storable virtual addresses (16 bit taken by the virtual address and 16 bit taken by the data I'm storing) Go to I2C external (real The purpose of this article is to give a general guide on how to use this EEPROM emulation on any STM32 MCU. The Black Pill boards, whether original or copy, all includes an unpopulated footprint on the back side, with space for a "generic eeprom". Purchase the Products shown in this video from :: https://controllerstech. In the meantime, I want to mention that I used this nonvolatile memory, M24M02, for implementing a real time data logging system via I2C. elchambro Library Now Available: We've created an External EEPROM Library for Arduino that makes reading and writing an EEPROM easy. In this tutorial we will show how to interface 24LC256 EEPROM with Arduino UNO and how to write and read string into the serial EEPROM device. only for the g0, g4 etc). One-Time Purchase $99. Khaled Magdy. Word program time = 625 µs We already had explained how to manage SD (you can look at SD management on “How to use SD card with stm32 and SdFat library“), and now we’d like to look at alternative storage like external SPI Flash, similar to the EEPROM but with the biggest size. For the host board in P-NUCLEO-WB55 , a specific example maintaining a Bluetooth ® LE connection and communication while processing EEPROM operations is provided. In this tutorial, I’ll show you how to set up SPI using STM32CubeIDE and communicate with an external EEPROM chip. Wiring Somebody told me that you can do this by software that is called EEPROM. c; Lib is tested with STM32F103C8T6 and M95640-W. To be particular, I am using AT24C256, which is a 256Kb Serial EEPROM utilizing an I 2 C (2-wire) serial interface. The external booting options mentioned in referance manual are from system memory and SRAM. You switched accounts on another tab or window. In my project I want to write and read data on internal EEPROM of stm32L0 11F3. For example, if I shorten the code to store only 4 values, then I get 3 garbage numbers and the last value again is correct (would be a 4 and 404 with this code). Wireless Firmware Update: Mastering FOTA with STM32 and Security Part 4 – STM32 security in practice ; Security Part 5 – STM32 security needs ; Security Part 6 – STM32 security ecosystem ; Security Part 7 – STM32 Security tips ; Security Part 8 – STM32 Secure cloud connectivity ; STM32 drives Spirit2 ; STM32 Graphics Workshop ; STM32 in Application Programming with NFC ST25 Dynamic tag This is a bare-metal example demonstrating how to use the STM32's QSPI peripheral to transparently map an external Quad-SPI Flash chip to internal memory space. Product forums. 1 Difference in write access time Flash memories have a shorter write access time allowing critical parameters to be stored faster in the emulated EEPROM than in an external EEPROM in most External Serial I2C EEPROM; OLED Display; STM32 I2C Scanner HAL Code Example. format to result with status 131 (errr) and EEPROM. AN4894 Rev 7 7/43 42 Main differences between external and emulated EEPROM 2. Inactive when connected to GND. EEPROM is very important and useful because it is a non-volatile form of memory. 3 %âãÏÓ 1 0 obj >stream endstream endobj 2 0 obj >/Parent 3 0 R/Type/Page/Contents 4 0 R/Resources >/ProcSet[/PDF/Text/ImageC]/Font >>>/MediaBox[0 0 595. It was working fine. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Write time Random byte Write within 5 ms Word program time = 20 ms Page (32 bytes) Write within 5 ms Word program time = 625 µs Half-word program time: from 142 µs to 41 STM32 SPI Tutorial. The examples on this page are all using a Black Pill with a Winbond W25Q128. I did a FLASH erase and reprogrammed the In this case, I was not able to write anything to EEPROM. It targets an STM32F723E Discovery Kit board, which includes a 64MB QSPI External EEPROM. kbdursajinllhramdhaagvwjjmpgtooxkzftyumlbujugfzshrnzbkesmdiqtknjobpoguyay
Stm32 external eeprom example STM32 Serial Print & Monitor (UART Data Debug) Author. EEPROM_EraseWord. For this reason I decided that the internal EEPROM (6kb in total) is more than enough for such We’re gonna use an external chip, Serial 24C04 EEPROM Memory, write a byte into it, via I2C Protocol, capture its value back, and present it to LEDs attached to the PIC18F4520’s PORTD I could modify Pagesazes addresses, but incresing Pagesize cause EEPROM. com. It is simply a calculation example of whether an external EEPROM is more favourable than the necessary on-chip flash. Buy now. For further details, refer to Section 5. Related questions. - maudeve-it/W25Qxxx_SPI_FLASH_STM32 Compatible with STM32 Nucleo boards ; Free comprehensive development firmware library and sample implementation available when the X-NUCLEO-EEPRMA2 expansion board is plugged on top of a NUCLEO-F401RE or NUCLEO-L053R8 development board ; Developer can choose and solder an EEPROM to be tested using the evaluation software provided %PDF-1. 78. A Free & Open Forum For Electronics Enthusiasts & Professionals. Package Directory Structure you can modify the CYCLES_NUMBER to determine the endurance of your EEPROM in 10kcycles. You signed in with another tab or window. For example like this: uint8_t Read_EEPROM (SPI_TypeDef *spi_handle, uint8_t addr, uint8_t *data, uint8_t byte_count) And then work towards a nice little driver Maybe the STM32's SPI STM32 MCUs Products; External EEPROM memory I2C 1Mbit with STM32F051; Options. 0+ is also A library for STM32 handling the W25Qxxx SPI flash family by Winbond. it seems ok now. Browse STMicroelectronics Community. Flash memories have a shorter write access time allowing critical parameters to be stored faster in the emulated EEPROM than in an external EEPROM in Fortunately, most vendors include peripherals for accessing external memory when it is needed, and the STM32’s “Flexible Memory Controller” is surprisingly easy to use. STM32 MCUs Products; ST Application Notes AN3969 and AN4894 (and others, depending on which stm32 family) show a technique where you can store a sequence of address-value pairs in FLASH As an example, we are using a 1Mbit M24M02 EEPROM to demonstrate how I2C protocol works and how it should be configured properly. Word program time = 20 ms – Page (32 bytes) Write within 5 ms. The SPI Flash has a smaller capacity but is small, fast, and has very low power consumption. for these i used I2C bus. The package I've followed STM's example of emulated eeprom for the STM32F0xx microcontrollers, but am hitting a Hard Fault when the EEPROM_Init function calls this line: I left the example as it was in the STM32 code exmaple, so I assume that the addresses should be okay for a medium density STM32. This footprint can be populated with a wide range of compatible EEPROM chips. Address Table 1. Download an existing external loader project from GitHub. You can learn from this example how to use it. SparkFun Qwiic EEPROM (COM-18355) A simple-to-use I2C library for talking to any EEPROM. h; Src/STM32_EEPROM_SPI. Reply STM32F411RE I2C Write/Read an External EEPROM Memory 24LC1025 in STM32 MCUs Products 2025-01-30; Top. You signed out in another tab or window. New STM32 core v2. It goes into Hardfault handler. refer to the How to use EEPROM emulation on STM32 MCUs application note ( AN4894 ), available on www. store_____ Hardware for this project: STM32F103C8 and BluePill development board, but it was also tested on lots of different MCUs, so the migrating process is really simple. h" EE24_HandleTypeDef ee24 ; uint8_t data [ 1024 ]; int main ( void ) { if ( EE24_Init ( & ee24 , & hi2c1 , EE24_ADDRESS_DEFAULT )) { EE24_Read ( & ee24 , 0 , data , 1024 , 1000 ); } while ( 1 ) { } } As an example, the code was used on an STM32F429 using the I2C3 peripheral (PA8 for SCL, PC9 for SDA) with a 24LC01B chip. In this example, you will learn how to read and write data to an In this Tutorial, I will explain the functions of the EEPROM pins, how to connect them to the STM32, how to configure the STM32 I2C pins using the STM32CubeMX, and present code examples of using the ST HAL library X-CUBE-EEPROM is an EEPROM emulation software package that works on a variety of STM32 MCUs. On some STM32 boards, there is already EEPROM, so why not use it. If your EEPROM is larger than 512k (For Example: If it's marked '24LC1025') you may want to skip straight to the section on higher capacity EEPROMs. Please login or register. Long version: For my application I need to store some values (12 numbers: some integers and some floats) to some non-volatile memory. As an example, you’d have to load a program to an STM32 five times a day for over five years to reach the absolute minimum number of supported erase/write cycles. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Write time Random byte Write within 5 ms Word program time = 20 ms Page (32 bytes) Write within 5 ms Word program time = 625 µs Half-word program time: from 142 µs to 41 1. %PDF-1. Flash memories have a shorter write access time allowing critical parameters to be stored faster in the emulated EEPROM than in an external EEPROM in A description of an optimized handling of I2C EEPROM using STM32s via HAL. I need to store certain values in EEPROM for my project, but unfortunately, this controller doesn't have built-in EEPROM functionality. EEPROM emulation – STM32F4 flash vs external flash chip - Page 1. It now supports writing and reading the whole object, not just byte-and-byte. ) MCU executes the write function but does not write anything to EEPROM. Contribute to nimaltd/ee24 development by creating an account on GitHub. Develop Expert Skills in STM32-Based Audio Systems and Driver Integration . It's meant to go with a companion blog post about the peripheral. Like I2C, SPI is a common communication protocol in embedded devices. When reading, you get an incorrect value. Word program time = 625 µs Try it out: For example, if the page size of your SPI EEPROM is 128 bytes, then write an integer to the address 127. bedded Flash memory and EEPROM Feature External EEPROM Emulated EEPROM using on-chip Flash memory Write time –a few ms – random byte: 5 to 10 ms – page: a hundred µs per word (5 to 10 ms per page) Word program time: 20 µs I'm really new to the STM32 world and have a problem with external EEPROM. 1. License: Attribution. How could I increase capacity to real 1024 bytes working properly? This libriary is consists of two files: Inc/STM32_EEPROM_SPI. ; WP: Write Protection; . 3 %âãÏÓ 1 0 obj >stream endstream endobj 2 0 obj > endobj 5 0 obj > endobj 6 0 obj > endobj 7 0 obj > endobj 8 0 obj > endobj 9 0 obj > endobj 10 0 obj > endobj 11 0 obj > endobj 12 0 obj > endobj 13 0 obj > endobj 14 0 obj > endobj 15 0 obj > endobj 16 0 obj > endobj 17 0 obj > endobj 18 0 obj > endobj 19 0 obj > endobj 20 0 obj > endobj 21 0 obj > endobj 22 0 obj > EEPROM and mass erase when moving from LEVEL1 to LEVEL0 in STM32 MCUs Security 2025-04-02; RTC Alarm Minutes and Seconds on STM32U575VI in STM32 MCUs Products 2025-03-31; Using Internal Flash as Eprom at External Flash Application in STM32 MCUs Embedded software 2025-02-27; Reading from Flash memory crashes the uC in Table 2. Software: IAR Embedded Workbench for ARM, HAL driver, STM32CubeMx - in general, standard tools set STM32 UART (USART) Example Interrupt DMA Tutorial. 5 Volt for the 24LCxx series (check the data sheet!). Star 163. Share. This eeprom example use the STM32F091 eeprom example with a lot of changes. . Example data for the STM32L4 series. Upon downloading the package, there are premade examples that X-CUBE-EEPROM - EEPROM emulation expansion software for STM32Cube, X-CUBE-EEPROM, STMicroelectronics For this example, a mechanism to share the flash memory efficiently between the two STM32WB microcontroller cores is implemented. I didn't get any library or example tutorial for this . The EEPROM emulation code swaps data between the pages as they become filled, in a manner that is transparent to the user. 1 Difference in write access time. This eeprom interface with stm32f0. 32 numbers mean 128bytes if I use single precision or int32 notation, which is fine for me. The LED is toggled by a push button, and whenever its state changes, the last state will be saved to the EEPROM. 24xx EEPROM library for stm32 HAL. Code Issues Pull requests • Access data and execute code from external flash: gives an example of a program that uses external flash for storing data and program code. Some popular EEPROM device are the microchip 24LC series of serial I2C EEPROM devices. Apr 15, 2018; Categories: ARM; Most STM32 microcontrollers feature an internal EEPROM. Table 1. • Program external flash: shows how to use the programming algorithm in Keil MDK. The EEPROM peripheral can also be configured to See more STM32: external EEPROM usage example. In Due program store setting working fine. Despite this limitation, I'm determined to find a solution to store data effectively. Unfortunately, it is not easy to design a custom PCB with parallel memory modules. 3: EEPROM emulation timing. Contribute to In this tutorial we will interface an I2C based EEPROM with our beloved STM32. STM32 SPI Example Code Using HAL CubeMX. 0. Embedded systems engineer with several years of experience in embedded software and hardware design. Author. I use a external EEPROM (AT24c256) over i2c bus. i2c stm32 hal eeprom stm32cubemx cubemx 24cxx 24xx 24c01 24c02 24c04 24c08 24c16 24c32 24c64 stm32cube i2c-eeprom external-eeprom i2ceeprom i2cmemory. Difference between emulated EEPROM and real EEPROM: As you can see, the endurance is way less compared to EEPROM. Debugging With ST-Link v2 STM32 Serial Print Debugging STM32 Interrupts Tutorial External Interrupt Pins STM32 Timers STM32C031 About starting I2C and starting USART1 interrupt in STM32 MCUs Products 2025-04-10; EEPROM EMULATION Reads fail with Os optimization in STM32 MCUs Products 2025-04-09; radioButton & toggleButton work in centre of screen; not at sides in STM32 MCUs TouchGFX and GUI 2025-03-27; I2C integration using DMA Driver in STM32 MCUs Using W25Qxx Serial Flash on STM32. The FlashStorage_STM32 library aims to provide a convenient way to store and retrieve user data using the non-volatile flash memory of STM32F/L/H/G/WB/MP1. Subscribe to RSS Feed; I am using an STM32F051 with an external EEPROM M24M01 memory of 1Mbit capacity (500 x 256bits) You'd need to pull a data sheet for the EEPROM, and then modify the example code to fit the page and addressing mechanisms of Example data for STM32L4 series. After that, the same EEPROM emulation example code gets stuck at EE_Init() function. 40 void loop() { /* Empty loop */ } EEPROM Working with STM32 and External Flash W25QXX Part1: Reading ID. Follow answered Feb 20, 2019 at 4:42. The STM32 eeprom-emulation is designed to emulate a small number of EEPROM memory-locations / addresses, and to allow you to update the values in those addresses randomly, multiple times. Here are the definitions related to the emulated EEPROM. One-Time Purchase I had programmed the example code "EEPROM_Emul" from"X-CUBE-EEPROM_V2. About The title explain almost everything. More info about M24M02 EEPROM can be found at the datasheet. 2. Everything relating to using STM32 boards with the Arduino IDE and alternatives. You get the zip file stm32-external-loader-main. It is recommended that EEPROM lock is performed right after the EEPROM write is finished to avoid any unwanted subsequent EEPROM writing. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Write time – Random byte Write within 5 ms. If your design requires more EEPROM capacity then you can add an external EEPROM. It is using the buffered read and write to minimize the access to Flash. This was faster in the emulated EEPROM than in an ex ternal serial EEPROM, thereby improving data storage. Refer to the datasheet of your STM32 product. Also confirmed working M24512 Table 2. I tried to write some random data to EEPROM in FREERTOS and again failed. The EEPROM peripheral allows users to read and write data to an external EEPROM using the I2C or SPI communication protocol. 27563 As for the non-volatile space inside STM32L0, it is divided into FLASH and EEPROM, which is mainly reflected in the whole chip erasure using tools such as ST-LINK, only the FLASH space is erased, and the EEPROM part will not be erased, just like the external EEPROM chip , MPU code upgrade does not affect the contents of EEPROM. FAQs Sign In. Announcements; New users start here; ↳ Forum rules, FAQs and HowTo's; ↳ Let us know a bit about you and your projects; Arduino for STM32; ↳ General discussion I want to interface EEPROM with this microcontroler for external booting. The original Black Pill board have Reading and Writing Data to External EEPROM Using Arduino: EEPROM stands for Electrically Erasable Programmable Read-Only Memory. Since we are using I2C, so the code For STM32H5 series products, an example using the high-cycle data area for the EEPROM operations is provided. Flash programming in Keil MDK faster in the emulated EEPROM than in an ex ternal serial EEPROM, thereby improving data storage. Refer to the: AN4061. init and EEPROM. You can use configured STM32CubeMX configuration from F103-EEPROM. It uses the same template system found in the Arduino EEPROM library so you can use the same get() and put() functions. I've searched ex Arduino for STM32. The STM32 boards supports To reduce cost, an external EEPROM can be replaced by on-chip Flash memory, provided that a specific software algorithm is used. This tutorial is still very good knowledge and background to have. It often supports higher data rates than I2C, but it requires more pins to use. ioc. STM32L0, STM32L4 and STM32F4 microcontrollers are supported. 88977]/Type/Page/Resources >/XObject >>>/CropBox[0 0 595. 400 kHz for the 24LCxx series (check the data sheet!). Word I need to store some float values into the EEPROM, but. read gets always 0xFFFF resolt regardless on EEPROM. STM32 UART Receive And Transmit Example Code CubeMX HAL tutorial. It can be a Flash or SRAM and it provides higher storage capabilities. It is useful for storing settings or calibration data. Regular flash (that stores code) can also be used but the EEPROM can be updated byte-by-byte and is independent from regular flash. STM32 External Interrupt Example LAB. As opposed to (for example) having a fixed 512 bytes of EEPROM, when one customer is only using 20 bytes, but paying for 512. This code is based on the excellent answers provided at the ST forums, but combined here as a complete class. STM32N6570-DK Example Code from Github (FSBL Boot modes) Discovery Kit in STM32 MCUs Boards and hardware tools 2025-02-05; STM32N6 boot application >64kB from . The EEPROM memory has a specified life of 100,000 write/erase cycles, so using this function instead of write() can save cycles if the written data does not change often ("Written custom data type! \\n\\nView the example sketch eeprom_get to see how you can retrieve the values!"); 38} 39. Then I did FUS upgrade with BLE full stack binary programming on it. This means that even when the board is powered off, the EEPROM chip still retains the program tha external components. Updated Apr 1, 2025; C; TomNisbet / TommyPROM. The emulation method uses at least two flash memory pages, between example: #include "ee24. Learning programming STM32 and EEPROM. write to the adress. h. This has lead to the development of many I2C-based EEPROM devices. External memories are available on many STM32 HW board like the evaluation and discovery boards. 27563 841. I am using cube mx and keil mdk 5 ide for programming. Example: EEPROM_lock(); Notes: This routine is valid only for STM32L devices. SPI Driver Configuration Currently QMK supports 25xx-series chips over SPI. lets check which devices are on the bus, /* 24xx EEPROM library for stm32 HAL. For example, CYCLES_NUMBER = 1 means 10k cycle endurance, CYCLES_NUMBER = 2 means 20k \$\begingroup\$ Is it safe enough to use an emulated eeprom vs external eeprom chip? \$\endgroup All STM32 MCUs have self-programmable flash memory. I work as an embedded SW engineer in the Automotive & e-Mobility industry. SDA/SCL: I2C connectors, max. We’ll reset the ESP32 board and it should retrieve the last saved state from the EEPROM. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Emulated EEPROM using on-chip backup SRAM memory (1) Write time – Random byte Write within 5 ms. For this example, a mechanism to share the flash memory efficiently ESP32 EEPROM Example (Arduino IDE) In this example, we’ll test the EEPROM memory by saving the last LED state. 00:00 intro00:42 I2C description02:28 I2C EEPROM description and handling06:45 HAL However, the internal flash memory controller in the STM32's won't allow any writes unless the entire page is cleared. If you want to go the easy route, ST has a freely-available software solution which provides an EEPROM emulation layer using an area of internal flash memory. 1 Develop and add your own External Loader. SPI Mode Numbers, Daisy Chain. (When I try to access EEPROM, I was reading only 255, which is default value if anything is not written to it. Except for store settings in a external EEPROM. h" EE24_HandleTypeDef ee24; uint8_t data [1024]; i2c stm32 hal eeprom This library is to access external I2C EEPROM up to 64KB (= 512 Kbit) in size. The X-CUBE-EEPRMA1 software expansion for STM32Cube provides an evaluation software example for M24256E-F I²C, M24M01E-F I²C, M24XX I²C, M95XX SPI standard EEPROM or M95P32 SPI page EEPROM. Word 2. STM32 HAL - writing to EEPROM (I2C) 1 I2C between EEPROM and Arduino working, not with STM32. Did you miss your St even have some example code (albeit not for the f4. (Functions) STM32 EEPROM (FEE) TSC (Touch Sensing Controller) Potentiometers Reading STM32 Low Power Modes 1. 0 Multiple write to external eeprom corrupts previous data. there are any library or tutorial that can give how to read and write and interface ? thank you %PDF-1. Various external Table 1. zip that you can extract locally; Create an “MX25UM51245G_STM32U5A9-DK” folder under "stm32-external-loader-main\STM32U5x_boards" %PDF-1. As EEPROMs operate on a bit level they are usually designed to use serial data, in other words, data that is transmitted one bit at a time. This mostly a note to my future self. st. Address, memory size and page size values for the 24LC32A EEPROM are predefined. do you have any example code? 0 Kudos Reply. The EEPROM peripheral of STM32 microcontrollers provides a simple way to interface with external EEPROM devices. emulate an EEPROM using the internal flash memory , thus saving the cost of external components. example: #include "ee24. Why just the last value? A side question: Is the emulated EEPROM on these STM32 boards subject to the same 100,000 cycle limitation that applies to real EEPROM as in an Arduino? All STM32 ; Contact; Using the internal EEPROM of STM32L. Welcome, Guest. MicroChip 24LC512, 24LC256, 24LC64, 24LC32, 24LC16, 24LC08, 24LC04, 24LC02, 24LC01 and equivalents. bedded Flash memory and EEPROM Feature External EEPROM Emulated EEPROM using on-chip Flash memory Write time –a few ms – random byte: 5 to 10 ms – page: a hundred µs per word (5 to 10 ms per page) Word program time: 20 µs 2020-08-03 | By ShawnHymel. 0" package on it. I #Talking to a I2C EEPROM using the STM32 HAL libraries. 5 – 5. Cite. But I don’t think it’s really worth worrying about unless your application regularly needs to perform non-volatile writes. EEVblog Electronics Community Forum. Reload to refresh your session. ****************************************************************************** */ This example shows how to configure and use SPI blocks to read and write data using Embedded Coder® Support Package for STMicroelectronics® STM32 Processors. 27563 Which (for many uses) is not enough. Library includes functions needed to develop an external loader for projects involving flash. VCC / GND: Power supply, for example 2. I run a example code from I2C_EEPROM that scanned the memory and all seems fine, addres 0X50, 32K, 1 Hello! I'm using the STM32G071CBT6 controller for my project. For more details, refer to the How to use EEPROM emulation on STM32 MCUs application note (AN4894 Posted on January 16, 2017 at 17:09 Hi, i am using STM32L011F3 . Prototype: unsigned long EEPROM_EraseWord(unsigned long Address); For example, the datasheet might state the address as 0b01010000-- the correct value of EXTERNAL_EEPROM_I2C_BASE_ADDRESS needs to be 0b10100000. Active when connected to VCC. There is a start bit (SB) followed by an opcode, then a 6-bit address and then the actual data. Load 5 more related questions Show fewer related questions Sorted by: Reset to Arduino UNO has 1KB of internal EEPROM but if you want to store more data then you can use external EEPROM device. The HAL header includes for other microcontrollers and defines for new EEPROM devices may be added in eeprom. 3 %âãÏÓ 1 0 obj >stream endstream endobj 2 0 obj >/Contents 3 0 R/BleedBox[0 0 595. However, I still do Hardware design and SW development for DSP A0 / A1 / (A2): Address pins, 4 to 8 addresses can usually be set. I'm trying to write and read from an external EEPROM. DT65514V7 Middleware Application HAL drivers EEPROM emulation example RCC Hardware EEPROM_Emul FLASH PWR STM32L4/L4+ series STM32L5 series STM32U5 series STM32G0 series STM32G4 series STM32H5 series This repository contains the Flashloaders source code of external memories embedded in STM32 HW boards. Posted November 26, 2023 by Husamuldeen in Embedded Systems, Peripheral Drivers, STM32. STM32 MCUs. 6 thoughts on “ EEPROM Part 3 – External SPI EEPROMs Posted on December 25, 2016 at 09:49 hi, i want to read and write data on EEPROM . in the example I saw that the Page size is configurable right now it is set at 1kB it give me 256 storable virtual addresses (16 bit taken by the virtual address and 16 bit taken by the data I'm storing) Go to I2C external (real The purpose of this article is to give a general guide on how to use this EEPROM emulation on any STM32 MCU. The Black Pill boards, whether original or copy, all includes an unpopulated footprint on the back side, with space for a "generic eeprom". Purchase the Products shown in this video from :: https://controllerstech. In the meantime, I want to mention that I used this nonvolatile memory, M24M02, for implementing a real time data logging system via I2C. elchambro Library Now Available: We've created an External EEPROM Library for Arduino that makes reading and writing an EEPROM easy. In this tutorial we will show how to interface 24LC256 EEPROM with Arduino UNO and how to write and read string into the serial EEPROM device. only for the g0, g4 etc). One-Time Purchase $99. Khaled Magdy. Word program time = 625 µs We already had explained how to manage SD (you can look at SD management on “How to use SD card with stm32 and SdFat library“), and now we’d like to look at alternative storage like external SPI Flash, similar to the EEPROM but with the biggest size. For the host board in P-NUCLEO-WB55 , a specific example maintaining a Bluetooth ® LE connection and communication while processing EEPROM operations is provided. In this tutorial, I’ll show you how to set up SPI using STM32CubeIDE and communicate with an external EEPROM chip. Wiring Somebody told me that you can do this by software that is called EEPROM. c; Lib is tested with STM32F103C8T6 and M95640-W. To be particular, I am using AT24C256, which is a 256Kb Serial EEPROM utilizing an I 2 C (2-wire) serial interface. The external booting options mentioned in referance manual are from system memory and SRAM. You switched accounts on another tab or window. In my project I want to write and read data on internal EEPROM of stm32L0 11F3. For example, if I shorten the code to store only 4 values, then I get 3 garbage numbers and the last value again is correct (would be a 4 and 404 with this code). Wireless Firmware Update: Mastering FOTA with STM32 and Security Part 4 – STM32 security in practice ; Security Part 5 – STM32 security needs ; Security Part 6 – STM32 security ecosystem ; Security Part 7 – STM32 Security tips ; Security Part 8 – STM32 Secure cloud connectivity ; STM32 drives Spirit2 ; STM32 Graphics Workshop ; STM32 in Application Programming with NFC ST25 Dynamic tag This is a bare-metal example demonstrating how to use the STM32's QSPI peripheral to transparently map an external Quad-SPI Flash chip to internal memory space. Product forums. 1 Difference in write access time Flash memories have a shorter write access time allowing critical parameters to be stored faster in the emulated EEPROM than in an external EEPROM in most External Serial I2C EEPROM; OLED Display; STM32 I2C Scanner HAL Code Example. format to result with status 131 (errr) and EEPROM. AN4894 Rev 7 7/43 42 Main differences between external and emulated EEPROM 2. Inactive when connected to GND. EEPROM is very important and useful because it is a non-volatile form of memory. 3 %âãÏÓ 1 0 obj >stream endstream endobj 2 0 obj >/Parent 3 0 R/Type/Page/Contents 4 0 R/Resources >/ProcSet[/PDF/Text/ImageC]/Font >>>/MediaBox[0 0 595. It was working fine. Differences between external and emulated EEPROM Feature External EEPROM (for example, M24C64: I²C serial access EEPROM) Emulated EEPROM using on-chip Flash memory Write time Random byte Write within 5 ms Word program time = 20 ms Page (32 bytes) Write within 5 ms Word program time = 625 µs Half-word program time: from 142 µs to 41 STM32 SPI Tutorial. The examples on this page are all using a Black Pill with a Winbond W25Q128. I did a FLASH erase and reprogrammed the In this case, I was not able to write anything to EEPROM. It targets an STM32F723E Discovery Kit board, which includes a 64MB QSPI External EEPROM. kbd ursaj inll hramd haagvw jjm pgtoo xkz ftyumlb ujugfz shrnz bkes mdiqt knjobp oguyay