eeprom | Arduino-Based Parallel EEPROM Programmer Circuit
kandi X-RAY | eeprom Summary
kandi X-RAY | eeprom Summary
This is a Shield extension board for Arduino UNO R3 that adds the ability to read and write parallel EEPROM chips.
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QUESTION
I have an EEPROM AT24C256. I want to write to this EEPROM from Timer Interrupt routine. But when I try, STM gets stuck. It's not going on for other code rows.
...ANSWER
Answered 2021-Jun-06 at 13:26Many issues in this code:
The main one:
- Do not use
HAL_Delay()
in the interrupt context. this function relays on the counter incremented in sysTick interrupt which can have lower priority.
Secondary: 2. Do not use any delays in the interrupt routines.
Try to do not call functions that execute a long time. Do not call any
HAL_
unless you are sure that they do not useHAL_Delay
uint8_t buf2[50] = { 0 };
is a local automatic variable.
QUESTION
I'm trying to port the code I wrote on simulator on a HR+ sensor, and I'm facing an issue I didn't have on simulator.
The code tries to write a quite large buffer (7.5KB) on EEPROM using Whiteboard's EEPROM API by splitting it in 16 bytes long temporary buffers, calling asyncPut
and busy waiting for completion (onPutResult
sets a flag) before writing the next chunk.
After a few thousands iteratations (it doesn't always fail at the same iteration) execution stops with this message I'm getting through RTT: 860:Whiteboard.cpp
I think it's an assertion failure. Are there more info available on this error? What am I doing wrong? Is my approach for writing large amounts of data the right one?
ANSWER
Answered 2021-Jun-01 at 09:54ASSERT on line 860 of the Whiteboard.cpp gets triggered when the sensor cannot handle a notification from a subscription in a timely manner. I did notice a "red flag" in your description: "... and busy waiting for completion ..." which is probably the reason for it.
The Movesense framework is fully asynchronous which means that any kind of busy-looping is strictly forbidden since it prevents normal operation of the sensor (like the above notification handling).
To avoid busy looping, trigger the next asyncPut in the onPutResult() callback and make sure to specify the AsyncRequestOptions::ForceAsync option to the call.
Full disclosure: I work for the Movesense team
QUESTION
I have a class like this :
...ANSWER
Answered 2021-May-19 at 11:25Your problem is related to static
variables. The rules for static
and therefore also static constexpr
variables depend on the particular C++XX standard being used. If the class members are not declared static constexpr
the code will work from C++11 on-wards while with it it will only work like this for C++17 and later. For versions prior to C++17 you will have to supply additional out-of-class-definitions.
The standard for static constexpr
class members has changed over the years:
Prior to C++17 any
static
class members did not have a location in memory until the variable was defined outside the class. This way one might define it at some other place, in another source file or a library. If it is used you needed to provide an out-of-class definition.
QUESTION
I have some code I have been putting on an ESP8266-12e board. Until recently it always worked fine. Now though when I finish uploading the code the blue light on the ESP8266-12e is staying on. I have tried it on two different board and the blue light stay on on both. I can't figure out what I changed in the code. I have decided to put it up and have everyone look at it and let me know what I may be missing. I hope someone can find something.
My code:
...ANSWER
Answered 2021-May-12 at 19:18So I got the blue light to go off. Instead of pinMode(D4,INPUT); and digitalWrite(D4,LOW); D4 is pin 16 which is the wake pin. So I had to define it thus #define LED3 16 and then pinMode(LED3,INPUT); and digitalWrite(LED3,LOW); I will change my original code to reflect these changes.
QUESTION
Is there a way to uniquely identify the computer connected to my Arduino, say using a MAC address or something similar?
Assume I have some data stored on the EEPROM of my Arduino UNO, and my PC's MAC address is stored in the uploaded sketch. Now, I want to compare it with the MAC address of the connected PC, and if the two do not match, I clear the data stored on the EEPROM of the board (so that the currently connected PC isn't able to read it).
Is there any way to get the MAC address of the PC (or something similar) that can help me identify the PC uniquely?
...ANSWER
Answered 2021-Apr-30 at 06:50If you use a custom-made Serial port program that runs on your different PCs, you could send some message to the Arduino after connecting. But just from Arduino and the Serial Monitor in the IDE, it is not possible.
QUESTION
i'm working on building U-Boot boot loader for raspberry pi 4. i have followed all the documentation instructions and building has finished well, but the results files are the following
...ANSWER
Answered 2021-Apr-14 at 15:16The MLO
file is specific to Texas Instruments (TI) SoCs and their ROM. What you'll want to do in the case of a Raspberry Pi 4 is to copy u-boot.bin
to kernel8.img
and that will cause the Pi's firmware to load U-Boot.
QUESTION
I need to change value in MLX96014 temperature sensors eeprom with raspberry pi and python. I can read its ram and eeprom without problems, but I cant write to it. Also every python MLX96014 library that I find dont have this function implemented for some reason. I tried to do this with arduino and it works great with this function:
...ANSWER
Answered 2021-Mar-30 at 17:43I dont know exactly why provided python code doesnt work but I have tried other i2c library and it started working. Here is the code snippet:
QUESTION
I am currently working on an I2C communication between an i.MX6 (Android BSP) and a NTAG 5 boost component.
I would like to decode the Capability Container at block 0 of the NTAG 5 EEPROM. I have written a C function that decodes the major and minor version of CC byte 1, as described in this table.
And here is my function:
...ANSWER
Answered 2021-Mar-19 at 08:14You could try using just bitshifts and masking.
QUESTION
I am currently working on an I2C communication between an i.MX6 (Android BSP) and a NTAG 5 boost component.
NTA5532 datasheet says : "According to NFC Forum Type 5 Tag Specification, EEPROM block 0 contains the Capability Container directly followed by the NDEF Message TLV."
In fact, below is the user memory orgnisation of the NTAG 5 boost:
So I used TagInfo NXP's app to read the memory of the NTAG 5 component.
Here is what I get concerning NDEF Capability Container using this app:
How can I decode this block as NXP does in its application?
...ANSWER
Answered 2021-Mar-18 at 08:18Following what says this PDF from ST about NDEF management, "The CC manages the information of an NFC Forum T5T", so the structure of this Capability Container is mainly common to all NFC Forum tags.
For more information about how to interpret the CC, see the previous pdf.
QUESTION
I am currently using a michrochip's eeprom ( 24cw160 ) connected with an stm32f4 (11RET) via i2c. The configurations and the connection seem to work as my logical analyzer prints some i2c messages (with ACK) and I can send data and receive data back. After reading the reference manual(especially pages 13 and 18 that have the schematics for the two operations I am doing) I am expecting the code below to send the data 0,1,2... to the addresses after x10 sequentially and then receiving the same data back and printing them :
...ANSWER
Answered 2021-Mar-10 at 07:53Thanks to the comments I managed to send a byte at whatever address I want . One noticed error on the previous code is the MemAddress
parameter( third parameter of HAL_I2C_Write_Mem
) ,because my eeprom is 11 bit addressable I should declare to hal that it is 16 and not 8 as the 5 extra bits are ignored bits ,but less than 11 might malfunction.
A second problem was that I was trying to write more than 32 bytes and I was reading only the first 32 as the protocol doesn't accept writing or reading more than one 32 byte page at a time. So here is the modified code with some comments on the changes:
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