Questions tagged [microcontroller]
This tag is related to questions that have something to do with a microcontroller. A microcontroller is a simple or small processor often with its program and execution memory on the same chip with input/output pins for controlling other hardware. Please specify the microcontroller and compiler or tools related to your question.
microcontroller
3,763
questions
1
vote
2
answers
69
views
When an embedded c program is created, why is there extra machine code around my compiled c program?
This C program blinks an LED attached to an AVR ATmega32u4.
ISR(TIMER1_OVF_vect) // attach Interrupt Sub Routine to TIMER1
{
// toggle LED
PIND = (1 << PIND5); // #define PIND (*(...
- 11
-3
votes
0
answers
17
views
Brain computer interface microcontroller or software? [closed]
I am trying to figure out the connection between an EEG device such as a headband and the external device performing the function. For example, it has been shown people can move cursors on computers ...
2
votes
0
answers
38
views
Using latches to capture 8086 bus
Following with that great answer Reverse engineer LCD Protocol used in MPC2000XL
The Latches are LS374
I'm trying to capture the data using stm32, I have used two latches as the following diagram
and ...
- 2,257
0
votes
0
answers
5
views
how to Use OV7670 Camera Module With STM32F46-DISCOVERY board?
I have a STM32F746 discovery board that needs to be connected to ov7670 camera module, i searched online but i couldn't find any document or solution related to it. Can anybody help me out?
- 103
-1
votes
0
answers
30
views
Connect a esp 32 cam to a oled display [closed]
I am trying to connect esp 32 cam to a i2c oled display ( one with vcc, gnd, sda, sck pins ), but I just can't let it work no matter what the circuit and code used are pinned below.
Code link
I ...
0
votes
0
answers
25
views
Output mode configuration: When to use push/pull vs open drain? [closed]
Hello guys I'm relatively new to Embedded engineering.
I wanted to know if there's any specific rule that experienced embedded engineers use when selecting when to use one of these output ...
- 8,698
0
votes
0
answers
25
views
Does Anyone has Gerber files of ESP01? [closed]
If anyone has the gerber files for ESP 01 Please share it.
I'm trying to Find Esp01's Gerber files all over the internet. If you have the gerber files please share it.
If you have bom of esp8266 esp01 ...
- 107
1
vote
0
answers
31
views
Problem with SDRAM on Portenta H7, red light blinks 4 long 4 short
I'm new to Arduino and am encountering an issue with my Arduino Portenta H7. I've written a sketch to sample analog signals from three sensors at a 25kHz sampling rate, using external SDRAM for data ...
- 11
0
votes
2
answers
72
views
How exactly x86 processor fetches the first instruction from SPI flash memory
On a x86 processor upon power ON of the system , the first instruction the processor usually execute is at 0xFFFFFFF0 which is called reset vector. Typically this address is in the BIOS or flash ...
- 43
0
votes
0
answers
19
views
Is it is possible for a USB device to be an XInput (XBox controller) and another HID device
I'm looking to have one physical USB connection (preferably for a RPi Pico/RP2040) that acts as an XBOX 360 controller AND allows the host PC to also send serial comms to the device.
I know that a ...
- 787
0
votes
1
answer
58
views
TMS320F28379D Inter processor communication issue
I am working on TMS320F28379D in which I am trying to achieve inter processor communication. And its also working when I try to read data which is send by CPU1. CPU2 Reads same data from 2 location. ...
1
vote
0
answers
31
views
STM32F412 SDIO Tx Underrun error when DMA is enabled
I am working on a project where I have to drive a SD Card. So far I have successfully implemented the initialization and reading data with DMA part. I am not using HAL libraries. The code to write to ...
- 43
0
votes
0
answers
37
views
Adafruit QT PY ESP32-S3 Stuck in Bootloader Mode – How Can I Fix This?
I have an Adafruit QT PY ESP32-S3. While experimenting with configuration and UF2 files, the board got stuck in a reset loop. Pressing the reset (RST) button once makes the LED blink purple once, but ...
0
votes
0
answers
24
views
My Proteus 8.6 is showing "Packaging 'NULL' of device 'LOGICSTATE' not found."
I am trying to make a project using 8051 and PIR sensor, and when I am simulating it I encountered a error stating
Invalid opcode Invalid opcode 0xFFE3 at PC=0x0004
So, when I checked the verify ...
1
vote
1
answer
57
views
Why is UART receiving data during MCU initialization (STM32F4)
I have code that initializes UART2 on the STM32F4 (and some other peripherals).
When the MCU completes initialization, it enters the USART2_IRQHandler and executes the Timer_Timeout_Enable function, ...
- 13