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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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FTDI Board as raspberry power supply

We've just made our custom board with an atmega1280 and a FT232RL to communicate with a raspberry pi 2. The board works well, bootloader:ok, arduino sketch upload:ok, serial comm to 1Mb:ok. As I've already tested this before with an usb hub : the…
G33k Labs
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Read/Write EEPROM Arduino

I have a new ATmega328P CH340G Arduino Uno R3 board. When I input a two-digit number (like 29), after power off and power on, the board shows only one digit (only 9). I want to show two digits. enter image description here Can you help me? #include…
Reg Reg
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at25 spi eeprom device tree

newb here. I have installed the at25 eeprom driver as a kernel module, but need a pointer to creating a device tree entry. I have a loaded and tested an SPI device tree overlay. Any help appreciated. TIA
rattus32
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Write EEPROM arrays on Arduino

I want to write the time at which the button was turned on or off. Every time that someone turns on the switch, Arduino would store this information.
Lucas
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How can compiler place data on ROM in embedded system?

As I know, the constant value, initialized data of variable will be placed in ROM (Read Only Momory) by compiler in embedded system. But, ROM is Read-only, means that can't write so how can compiler can write these data when programming? I think…
Anhvu
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EEPROM stroe and Initialization makes pointer from integer without a cast

I get warning: Initialization makes pointer from integer without a cast This is my code: case 4: { uint8_t* adr = 12; writeEEPROM((uint8_t *) adr, &z, sizeof(z)); } writeEEPROM have: void writeEEPROM( uint8_t* eeAddress, uint8_t*…
drVrh
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Using a pointer to access typedef struct

Objective: Writing to an internal buffer from the values of members of a structure. I have a structure that contains members of type Uint16 (unsigned int); here is a small portion of it: typedef unsigned int Uint16; typedef struct { Uint16…
KS7X
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Arduino Uno - Incorrect/Scrambled Serial Data

I have been struggling to write a very simple Arduino program that increments address pins to an EPROM and then reads in the data through other pins. When I was unable to do something as simple as increment an array of boolean values (the MSB on…
Bit Fracture
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Codevision AVR access external eeprom 24c02B using TWI

I'm a beginner in C. I'm trying to write and read to external eeprom (AT24c02B) then show the data bytes that store in eeprom to LED in PORTB and or to LCD. So I know the data successfully stored in eeprom. LED in PORTB is active low. Here is the…
ipintigabelas
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are there any other methods of storing binary numbers

A binary number is normally stored with a fixed position MSB and a LSB; from LSB to MSB the weighting is doubled each bit. Are there any other ways of storing a binary number? the traditional way may be the most efficient way, when requiring the…
gary
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PIC I2C communication with external EEPROM

I am new to PIC. I know there are lot of posts in this forum on I2C and I have tried all the methods given but still doesn't solve my problem. I am using pic16f1516 and an external EEPROM CAT24C04TDI to store some data. I have used 4k7 ohm resistors…
PicFan57
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C program example for Read and Write to SPI eeprom on linux

I am trying to write 4 bytes to spi eeprom on linux and then read 4 bytes (the last is the important one, I'm working with zybo board), I did all for spi eeprom detection and now I have: /sys/bus/spi/devices/spi32766.0/eeprom In this link: Read…
Servio
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Reading a character and integer command from radio in order to execute a function

I am trying to create a code and loop that can read a character and integer from radio. This character is a command that will represent a packet recover command. This code is being performed in Arduino. The purpose of this code is to read a…
MidknightZero
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dspic33fj128mc804 and eeprom 25LC256 by SPI

I am trying to write and read from the EEPROM (25LC256) with my dsPIC 33FJ128MC804, I tried to use the examples from the website, however they used the explorer16 with the dsPIC 33FJ256MC710, so I take the code and I made the changes to used it in…
Carlos Ramírez
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How to save a list of strings in arduino?

I want to create a list of names on my Arduino. I want to be able to add a name to the list, I want to be able to remove a certain name from the list and I want to be able to check if a certain name exists in the list. As far as I understand I need…
Emil Bonne Kristiansen
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