Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [read]

25 questions
8
votes
4 answers

How to follow the signal when reading the schematic?

I am learning how to read schematics. Are there any guidelines or good practice on reading schematics? It's my understanding that schematics are read left-to-right and that is how one should follow the signal: from left-to-right. Is that correct and…
komrad2236
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2
votes
2 answers

Reading measurements from an oscilloscope. Figuring out rise time

I have this picture (Sorry for the glare): The two verticle bars are a at 0.5v and b at 4.5v, or at least roughly at this spots. I need to get the rise time from 0.5v to 4.5v, but I don't understand the measurements on the top right. is it 100…
JustHeavy
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1
vote
1 answer

SD card module with ESP32

I'm using an SD card module with ESP32. My plan is to store configurations such as SSID and passwords. I tried the function with a text file which contains the text "Hello" and for Serial.write(file.read()); it prints exactly "Hello". But,…
kachaya
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1
vote
1 answer

Read data from a register in C-code

I am a beginner and learning by myself. I need your help to start the third implementation in my life in VIVADO ( "Hello world" and "led") I will implement SPI connection with DMA, but because I am a beginner I would like to start with the simplest…
Noel Miller
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1
vote
2 answers

Moving AI IP into new FPGA. Is the trigger for reading ROM an address change?

I'm confused about the trigger for reading ROM. I want to read one of 4 k bytes but it appears the clock is free running and may be continuing to read the same address while I'm processing the byte I read. I can't use a wait value, since every byte…
Ralph
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1
vote
0 answers

i2c : When writing to Slave Read 255 seen on bus

I am using Renesas RH850 controller in which I am writing 48 byte of data to slave device (Ublox IC) over i2c every 100ms and sometimes I can see 255 in between my data transfer which results in failure of transmission. What is the reason in which I…
Ajit Thalange
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1
vote
0 answers

Recover correct value from unstable memory through read operation

We are given a memory with 32-bit width for each word. it has the length (N - number of rows) which is not relevant for the question. we know that the memory has a problem where at any row, one bit could be replaced with a different value (it's not…
Firas Abd El Gani
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1
vote
1 answer

Is it possible to read the memory from a Holtek HT46R064B OTP(!) chip?

I am trying to get data from a Holtek HT46R064B. I know that the Chip is an OTP (One-Time Programmable) Chip. I ask myself if it is possible to read some parts of its memory. In my case the chip is soldered to a PCB. I am trying to prove that the…
Neumi
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1
vote
0 answers

How to read all memory from damaged CF?

My CF card has been corrupted. I don't know how is that happened. I just using new card (five months old) on EOS 5D Mark II with installed Magic Lantern. The card just not see as USB device on my PC. And DSLR not launches with this card. Very…
Broly
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1
vote
1 answer

I get the same value, when read via i2c - stm32 + hih6030

I want to use my HIH6030 humidity and temperature sensor with my STM32F4 board, but I have the following problem: I turn my board on and start debugging. The first time when I try to read out it's ok. It seems I got good values, but next time I…
prodx
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1
vote
1 answer

Code protection in External flash

I am implementing external code execution for STM32F765VG with NOR flash (8/16 bit). The idea is to execute code from external flash memory. are there any ways to protect my code present in external memory from unauthorized access? I have…
User323693
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0
votes
1 answer

Read a register using I2C, gets HAL_ERROR message

I am trying to read from a register in MAX17320 using I2C protocol but get always HAL_Error message. I have the chip MAX17320 and a microcontroller STM32F105, when I try to read from the register nDeviceName(121h) to see that the chip is working I…
Ali
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0
votes
2 answers

Serial reading returns undefined characters

I am trying to communicate using LoRa modules with an ESP32. I can easly communicate with two LoRa modules, but if I want to learn the sender address, the Arduino returns an undefined character. I am using an E70 433nw30s and it has a document for…
mehmet
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0
votes
0 answers

Analog pins showing incorrect data. Only from 0 to 255

A month ago, I connected a joystick with an Arduino Uno. VCC with Arduino 5v, GND with ground and Y axis with analog. I tried all, but the error persist with all 6. A month ago, in the serial monitor I got data ranging from 0 to 1023. Today, when I…
HexaTech
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0
votes
1 answer

ESP32 - Read multiple analog inputs

I need to read multiple analog inputs as fast as possible on a ESP32. With as fast as possible, i mean that ideally all inputs are read simultaneously. Currently I simply read them one after the other with consecutive AnalogREAD() calls in my code,…
sharkyenergy
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