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Questions tagged [eeprom]

Anything related to Electrically-Erasable Programmable Read Only Memory (EEPROM), a kind of non-volatile electronic memory technology. EEPROMs can be programmed and erased using only electrical signals and maintain their content also in absence of power supply. The now ubiquitous Flash memory is a specialized form of EEPROM. QUESTIONS ON STACK OVERFLOW MUST BE PROGRAMMING-RELATED, for other types of questions, post on another Stack Exchange site.

Anything related to Electrically-Erasable Programmable Read Only Memory (EEPROM), a kind of non-volatile electronic memory technology. EEPROMs can be programmed and erased using only electrical signals and maintain their content also in absence of power supply. The now ubiquitous is a specialized form of EEPROM.

See Wikipedia page on EEPROMs.

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How to operate at24c32 by smbus in linux?

What if the EEPROM used is greater than 32K, such as at24c32, and the register address is 16bit? It seems that smbus only supports 8bit registers? I can read 0xff, but the written content will return - 5, which fails. I want to know whether the…
lugc1
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Arduino 24LC256 EEPROM only reads 255

Print to console is always "255" I ran code to check for peripherals it saw a device on 0x50. I don't understand how the EEPROM knows what memory address to read. Neither requestFrom() nor read() pass a value for the memory address to start reading.…
Playing with GAS
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How can I use the Pins in the Struct

Hello I have a problem STM32 . In my library I wrote for eeprom, I want to use the pins and ports in the struct and then use them in the HAL_GPIO_Write_Pin function, but I could not succeed. ERROR: incompatible type for argument 2 of…
MG_Embedded_Candidate
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Issues with EEPROM functions not saving data for board type (Arduino)

I am trying to work on an Arduino project and for some reason, I cannot get it to store the data on the Adafruit Metro M4 controller or data logger shield (saving so that when reconnected, the data entered would still be there). I have an SD card…
user15881691
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PIC Mplab XC8 EEPROM Read Null

How to check if the eeprom at a particular address is null/empty or not. I'm using the PIC18F45Q43 and using eeprom_read() function.
Rafay Shams
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Unable to access SPD information on AMD EPYC

Background I'm trying to access the Serial Presence Detect Data via i2c on CentOS 7 Linux. I'm mainly looking for the SPD Revision located in byte 1 and is consistent on DDR3 and DDR4 charts. The SPD Revision can not be found through dmidecode,…
jw-smc
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`i2cdetect` command shows multiple slave addresses for single device

I am working on a project where I need to communicate my slave device EEPROM (Slave address as 0x54). But when I gave the i2cdetect -r -y 10 command it shows 8 different addresses for single hardware. I had configured the hardware by device…
chandru
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How do I use Preferences.h library in iteration?

I am using an ESP32 WROOM 32D module in a project using Arduino IDE. I want to utilise NVS facility with the help of Preferences.h library that it provides, although the data that can come through user would be stored in different namespaces and…
NaidarDevil
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EEPROM Problem (cant clear arduino-uno eeprom)

I have encountered problem with my Arduino Uno, I just recently started using arduino, and this is my first time to use the EEPROM. My problem is that I have created a password protected door, and due to several attempts I have stored so much…
Karolo
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ESP32 CAM can't upload to firebase

Hi I want to upload a face sample from the esp32 cam to firebase but I can't find the line of code that shows the process of saving to the esp32cam flash memory. the code I use is the default code from esp32cam. can anyone help?
Reina Maharani
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ESP32 Partition and Data Storage

I am trying to write firmware code for RFID device which will have config data storage as well as the temporary storage that maybe can be read and then if convenient be removed. I am using Arduino IDE to program this on an ESP32 Wroom32. I have…
NaidarDevil
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EEPROM Data Address Width

I am beginner to electronics and embeds and I am struggling with some probably basic notation in EEPROM.I am using AT25640(64k(8192 x 8)) EEPROM and have confusion with data address width. Array Addresses are from 0000-1FFF that means it has 2 Byte…
gb008
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How is data written into FLASH MEMORY by pages?

Note: FLASH memory is a type of EEPROM. But when I say EEPROM, I exclude FLASH memory. I have been checking many sources but could not find a clear cut answer on this. From what I read, it looks like most ordinary EEPROMS -nowadays- utilize SPI or…
Xfce4
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Does the memory map of a structure change whether there is a pointer or namespace difference?

I am looking to write a firmware that writes a structure to and reads it back from EEPROM memory. Converting the structure into a byte stream is working, however when I abstract the problem by putting the structure into a namespace, or call…
J Collins
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How much is the minimum number of pages used with EEPROM EMULATION (AN4894) techniques?

I'm implementing eeprom emulation with the STM32G0 series microprocessor. I am using the AN4894 Application note and the X-CUBE-EEPROM(4.0.0) software, but I have encountered a problem. AN4894 Application note X-CUBE-EEPROM Let me explain how I use…
mefilti
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