Questions tagged [flash]

Flash memory is a type of memory available on the Arduino boards. It can be accessed from a program using PROGMEM directive to store data. For questions about using and accessing flash memory, use this tag.

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1answer
2k views

Flash String Helper object as variable

So I have a Bunch of commonly used char arrays to build commands in my library. So to preserve memory, I have them put into flash, via PROGMEM ext, typedef const char PROGMEM ProgChar; ProgChar AT[] =...
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0answers
48 views

How to adjust Partition Scheme Wemos D1 mini pro?

I bought myself a WEMOS D1 mini PRO (16MB) for creating a quite large project. As I'm writing code, my memory is starting to grow. When I looked at the Flash size in Arduino IDE, the only options I ...
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0answers
43 views

How can we remove unused feature in Arduino's standard SD library so we can reduce the sketch size?

With the ReadWrite example in Arduino IDE, the sketch size is 10980 bytes (34%) of an Arduino UNO's storage. How can we reduce the sketch size? There isn't any kind of #define to turn on/off features ...
0
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0answers
45 views

D1 mini esp8266 error: esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header

I am pretty sure this device worked yesterday. I tried to short GPIO0 to ground (flash), nothing. I have a second ESP that uploads fine, but this one does not. Is their another way to get this ...
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0answers
33 views

25Q128 flash and garbage data over SPI

I have a logic analyzer coming in the mail, but thought I might ask for help here first. I soldered the 25Q128 flash onto an adapter and wired it up to an Arduino UNO clone as you can see in the ...
3
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1answer
209 views

Extend program space by getting rid of bootloader on NANO

I just have a complex program that runs on a NANO. Now when I use my printlns for debugging I am running out of memory. I read about using a programmer to get rid of the bootloader that uses 2K space ...
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0answers
337 views

Read & write on Winbond SPI flash using Arduino UNO

Recently I have brought a original UNO for modifying and flashing various types of bios. I had a dedicated one click bios programmer which was very expensive but few days ago it failed. So I thought ...
4
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1answer
473 views

Flash Arduino Due via UART

I would like to write code in Arduino language, compile it in the Arduino IDE, grab the resulting binary code, and flash it to the Due via the TX/RX UART pins, bypassing both the USB Programming Port ...
4
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3answers
6k views

How to read/write variables persistenly on Arduino Due (no EEPROM/shield)?

I am relatively new to Arduino and I am currently writing some code to control a relay board. The on/off times are provided by the user at run-time and should be stored persistently (EEPROM or flash) ...
7
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4answers
4k views

Where can I find out how to make a hex file for arduino firmware?

I have followed this tutorial on flashing my Arduino R3 to turn it into a "USB keyboard", but the article doesn't explain how the hex works, it's just for granted. Where can I learn about how to make ...
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1answer
130 views

Memory usage in AnalogBinLogger of SdFat library

The AnalogBinLogger.ino file of SdFat library says the following: Each 512 byte data block in the file has a four byte header followed by up to 508 bytes of data. (508 values in 8-bit mode or 254 ...
1
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1answer
128 views

ESP32: best way to embed certificates

I'm using the Arduino framework on an ESP32 based board. The board has an SD card slot, but I'm not going to use it. Anyway, I need to store somewhere the certificates. To the the firmware I've just ...
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0answers
39 views

CMOS returns unexpected result via SPI

I'm trying to set up SPI in order to interact with a CMOS flash, the MX25L6405DMI-12G to be exact. As a test I'm trying to read the identifier (RDID) which should return 3 fixed bytes. Currently the ...
1
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1answer
158 views

Is it possible to upload and run code from EEPROM during boot time?

I am having problems while writing custom bootloader, so that it uploads code from EEPROM (for now internal, as I have no external memory in my hands) and writes into flash. After ~2 weeks of ...
1
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1answer
46 views

How Arduino UNO differentiate between program/flash and serial terminal data

I am excited to know how Arduino UNO or nano differentiate between program data that is to be burned into its flash when we press Upload Sketch and serial terminal data when we press Send? Is there ...
0
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1answer
91 views

External RAM (23LC1024) and external Flash (W25Q64JVSSIQ) with Sparkfun SAMD21

i'm trying to extend the capabilities of the Sparkfun SAMD21. My question is, which pins do I have to share? I mean, I understand that MISO, MOSI and SCK are shared, but CS connects each to a ...
1
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0answers
55 views

avrdude not in sync

So this uno was working before, now i can't upload anything, can't even burn the bootloader. Using another arduino as isp does not work. It always says avrdude: stk500_recv(): programmer is not ...
0
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1answer
66 views

Erasing 1 byte of external Flash memory (winbond)

i'm trying to use an external flash memory Winbond 25q64jvsiq for my Arduino Nano based project for audio recording purposes, to have extra memory for recording 1 byte audio samples, since Arduino ...
0
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1answer
356 views

samd21 linking, change the base addresse from the default

I'm working on creating a safe firmware upgrade for my adafruit feather m0. I understand from my CTO that wrote the previous upgrade that for either samd21 or all arm m0 (not sure which) the compiler ...
3
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1answer
249 views

Can I force a function to live in the boot sector without overwriting the bootloader?

Not for any practical purpose but just out of curiosity, I want to abuse the flash memory and write it dynamically at run-time. This is, in a sense, what the bootloader does. If I understand it, the ...
0
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1answer
52 views

How are locations in FLASH memory addressed?

There is an external FLASH memory (W25Q80DV) that I want to use with the Arduino. This memory has 4096 pages of 256 bytes each. I want to make multiple writes per page to use memory evenly and erase ...
1
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1answer
572 views

ESP8266 OTA update with different flash size settings?

I have an ESP8266 in a project. It's specifically this ESP8266 SMT Module - ESP-12F item. It's been working great with OTA, but I realized belatedly that I didn't change the flash settings when I ...
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0answers
59 views

Is there a way for an Arduino to flash another one without a computer?

I am going to create a game console. The games will be in an SD card and an Arduino (or an Atmega chip) will read a hex file's contents to RAM and will flash it to another one. Something like this but ...
1
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1answer
560 views

Program Arduino via UART from ESP8266 SPIFFS

I have built a custom board that has an ATmega328p connected to an ESP8266 module via UART. I am currently programming the ATmega328p using a USBtiny programmer via an SPI header. The ESP8266 module ...
0
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2answers
421 views

NodeMCU ESP8266 12E loses code after power is reconnected

I have uploaded a simple code to control a 8 channel relay by turning individual relays on and off When I upload the code it works properly, the code works properly and the relays turn on and off in ...
0
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1answer
83 views

Writing to flash memory fails with Optiboot

I am having some issue writing to flash memory on Arduino Uno. I burned the optiboot bootloader that ships with the IDE 1.8.3 to the chip, then uploaded the test_dospm sketch to write content to ...
3
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4answers
707 views

How can a function/method determine if a const array passed in is PROGMEM (flash) or not (RAM)?

Is it possible for a function/method to know if a constant array that has been passed in is in flash or RAM? If I have a method or function that receives a constant array that is in RAM, the array is ...
1
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1answer
884 views

Unable to upload sketch after bootloader has been flashed on Arduino Micro

I have created my own custom Arduino Micro, but I am experiencing problems when I attempt to upload an sketch via USB in Arduino IDE. Here is how I program the Arduino Micro: avrdude -c ...
0
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1answer
305 views

esp8266 OTA issue

I have uploaded the BasicOTA sketch in Esp8266-12e. I am written one program, when i try to upload it first time in Esp using the OTA port it gets uploaded successfully, but when i try to upload any ...
0
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0answers
148 views

SPIFFS image does not fit in flash (offset 108MB)

I'm trying to upload an empty SPIFFS image to my ESP32's flash memory via the ESP32 sketch data uploader but I'm getting the following error: [SPIFFS] data : /path/to/my/data [SPIFFS] start : ...
3
votes
3answers
4k views

Trying to flash ESP8266 with Arduino UNO

This is my first project other than some of the starter projects. I am trying to flash the firmware onto an ESP8266 wifi module using and arduino uno. It would be nice to know if anything is wrong/...
1
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1answer
271 views

Usbasp Arduino Uno Bootloader Flash Error - Win 10

I'm trying to flash an Arduino Uno using usbasp but i'm getting the following error,I have checked all the connection and voltage using multimeter but still this error: Arduino: 1.8.8 (Windows 10), ...
0
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2answers
87 views

Is possible use Macro F() with Integer and Other types of variable?

i have a sketch that is using very memory RAM of my Atmega2560 (is a giant project), and i need use various "println" because i have a TFT screen and i need to show data on the screen to user see. So, ...
0
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1answer
397 views

make EEPROM.h use custom eeprom partition

I created the below partition table for an esp32 and replaced the 'default_8MB.csv' with it. # Name, Type, SubType, Offset, Size, Flags nvs, data, nvs, 0x9000, 0x5000, otadata, data, ...
-1
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1answer
217 views

How do I set up an ATTiny861A-PU for flashing with Arduino Uno?

I have found instructions for 8 pin Tiny but none for my 20 pin. How do I set this chip up on the breadboard for bootloading with Arduino?
0
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1answer
72 views

Porting “far” flash memory access from Arduino Mega to Due

I have a project that runs on the Arduino Mega 2560 which takes up almost the complete amount of flash memory available (https://github.com/fredlcore/bsb_lan/blob/master/BSB_lan.ino). Because of this, ...
0
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1answer
1k views

ESP8266 stuck in flash mode?

I have the setup described here: https://learn.adafruit.com/esp8266-temperature-slash-humidity-webserver/wiring I currently have the reset pin set to float and the GPIO0 pin grounded, which should ...
-1
votes
1answer
151 views

Using ESP8266-01 via Arduino(no flash) without AT commands(using serial monitor)

I'm trying to build a smart Keychain using Arduino uno wifi(org, so Im using it like it's Arduino uno), ESP8266-01 And neo6m GPS device. My esp8266 wasn't new, and it came without AT firmware. I ...
2
votes
1answer
249 views

AVR-GCC can't call function located on fixed address

I wrote the following code: #include <avr/io.h> __attribute__((noinline, section(".app_start"))) void app_start() //app_start section starts at 0xFA0 { //register_packet_dispatch(...
0
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1answer
171 views

Esp32: upload eeprom file

I'd like to flash the eeprom sector with content so that the eeprom already holds data when it boots the first time. How do I upload such an eeprom file like I would do with avrdude on an atmega? Is ...
2
votes
2answers
501 views

EEPROM.get returns bad data

I am using the attached code. What I am trying to do is: Test if there is a personalized "board serial number" written in the EEPROM (by previous code run) If data found was not 7 characters (e.g SN-...
-2
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1answer
184 views

Arduino DUE- flash space for user

I need for my project to save only 32bit in non-volatile storage. What is the easiest/cheapest way to do that in Arduino DUE? ArduinoDUE is Atmel SAM3X8E so according to the attached table (from ...
1
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2answers
216 views

How fast is flash reading compared to SRAM?

I'm working on a project that will eventually scale to 864 LEDs on WS2815 LED strips (three rows of 288 LEDs). I'm currently running it on an Arduino Uno with a single test strip of 144 LEDs. FastLED ...
2
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2answers
592 views

ESP8266 seems to be bricked , how to recover?

In a part of my sketch I put by mistake pinMode(7,INPUT_PULLUP); Which is dedicated pin for external flash chip (gpio7/SDIO_DATA_0/SPI_MISO) that not supposed to use for sketch. after uploading ...
0
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1answer
164 views

SPIMemory does not write always correctly

I'm using a WinBond 25Q128FVIQ (Flash 128 mbit, 3.3V) in combination with the Marzogh SpiMemory library on my Arduino Nano (also 3.3V). After using the default example, I found out what was read, did ...
1
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2answers
780 views

Arduino memory issue with old HP HDSP-2000 display chips

I'm running into memory issues with an Arduino Nano driving some old HDSP-2000/HDSP-2011 chips. I cannot seem to get the ASCII 5x7 array into PROGMEM and have it read properly. It's so low on memory ...
-1
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1answer
236 views

esp8266 esp01s EEPROM and flashing

which flash option do I need to take to use EEPROM? Can I flash with 1MB and no SPIFFs and still write data to EEPROM? thanks T
1
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2answers
2k views

Arduino LED flashes with one button press

I want the LED to flash when I press the switch once, but it keeps flashing. I tried the idea of just lighting the LED and keeping it lit with just one button press, so I wrote: int led=13,button=12; ...
2
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1answer
52 views

Is it possible to execute a code in runtime when gets updated over the air (OTA)?

I would like to build a lib like ArduinoOTA but with no downtime at runtime. To achieve that I am wondering if it is possible to create a simple setup and loop code to Check for new releases If we ...
2
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0answers
105 views

Erasing all flash on boards with over 64kb of program memory

I'm using a Mega2560 board. My project needs to store some large constant data. To preserve the first 64kb flash chunk, I write these data on addresses beyond this limit. But there is either an ...