Questions tagged [embedded]
An embedded system is a computer system designed to perform one or a few dedicated functions, often with real-time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts.
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Ethernet on embedded cluster
I’m reaching out with a small challenge. I’ve designed a few PCBs before, but this one will be my first truly "complex" project. The goal is to integrate multiple processors in the form of ...
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Learning how to design and fabricate a custom PCB for a microcontroller
I am a computer engineering student with a solid foundation in basic electronics, microcontroller programming (C and AVR assembly), and various circuit analysis principles. I'm keen on designing my ...
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MT7628 DDR2 Termination Resistance Issue
I'm designing a custom flex PCB with an MT7628AN SoC and 2Gbit of DDR2 SDRAM running at 200MHz. Because the flex PCB is only 0.3mm thick and 4 layers, I'll be unable to realistically create 75Ω trace ...
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STM32 (Blue Pill) : Should I flash erase everytime I want to upload the code?
I am new on STM32. I am using STM32F108C8T6 as my board. First I did blinking internal LED. After that I went to blinking external LED. But the second time I updated the delay timing I got this error:
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Cellular Modem (MTQ-LEU7) hardware reset (RDY) specifically when sending TLS Client Hello over PPP
I am developing an embedded application using a iMXRT1064 based custom embedded board and a MultiTech MultiConnect Dragonfly (MTQ-LEU7) LTE Cat 4 modem. The system communicates over a PPP link using a ...
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STM32F4 TIM2 output at twice expected frequency
I have an STM32F407 dev board that I'm trying to configure the TIM2 peripheral on. TIM2 uses the APB1 timer clock which should be 84MHz as I've configured it. However, when I use 84MHz to calculate ...
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EEPROM interfacing with I2C [duplicate]
I need to interface an EEPROM to my microcontroller using I2C interface. I also want to connect an RTC in the same bus. How should I calculate the required pull-up resistor values? As per the EEPROM ...
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Getting switch cases to work as intended in STM32 -BluePill
I am using a bluepill, and the final case statement is looping constantly from GO_TO_TOP -> COME_TO BOTTOM -> ROTATE_ACTION, the 'top' variable is being latched to '1' at the GO_TO_TOP case ...
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Generating two PWM signals from a PIC18F45K20
I'm doing an environmental control group project for my embedded systems module. I want to generate two PWM signals:
Control fan speed from ADC readings from a TMP36
Dim an LED strip depending on ADC ...
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SMARC carrier PCIe, USB3, SATA pinswap
Currently I'm trying to implement SMARC carrier board and I'm a bit confused about M.2 PCIe, SATA and USB3.0 signals connections (Rx/Tx swapping).
First, the PCIe:
SMARC standard describes PCIE_x_TX ...
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Seeed nRF52840 LED won't turn off in deep sleep
I am using a nRF52840 along with a LTC3588-1 dev board. My goal is to activate BLE only when the PGOOD signal of the LTC is high, otherwise the nRF goes into deep sleep. However, when the nRF goes ...
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Charge Pump Circuit Connected to STM32 BOOT0 Pin - Why and How?
I found this charge pump circuit in a design where the output from BOOT0(already pulled to GND) of STM32G431CBTx drives the CP_PWM signal. Can someone explain why this configuration is used?
My ...
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Selecting External Clock Source for NUCLEO-WB55RG Board
I am not finding the clock frequency of the oscillator used on the NUCLEO-WB55RG board?
What's the value?
Where can I find it?
How to select it as clock source for the MCU?
Which one should be ...
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Custom PCB shorts at 3.3-gnd and miso-sck pins only after soldering MCU chip
I made a PCB and got it manufactured the PCB does not have any shorts (specifically between 3.3v, ground, sck and miso of an ADC SPI pads) when the MCU chip (stm32h563zit6) is not soldered
but the ...
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Seeking Schematic Review & Power Optimization Insights!
Deep Dive into Ultra-Low-Power Design: STM32U0 + E-Paper + SHT45 (CR2450)
I am engaged in a project focused on extreme power efficiency, and I am currently at the schematic review stage prior to PCB ...
