Questions tagged [embedded-systems]
"An embedded system is a computer system designed for specific control functions within a larger system, often with real-time computing constraints." Michael Barr. "Embedded Systems Glossary". Neutrino Technical Library. Retrieved 2007-04-21, copied from Wikipedia.
191 questions
1 vote
1 answer
238 views
Internal data representation in firmware
I'm developing firmware for control system. That system will collect data from different sensors (using ADC, GPIO, I2C temperature sensors, etc.), process this data and generate some control signals. ...
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1 vote
6 answers
382 views
How to manage common library dependencies to prevent cross-application breakage?
Note: The question was heavily rewritten after the comments it received. I work on a team that develops embedded software for various in-house devices. Each device hosts multiple "bare metal"...
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4 votes
3 answers
672 views
What's the difference between embedded systems and other software systems?
I've decided to self-study software engineering from textbooks. and I came across the term "embedded systems". I went to chatGPT to ask it what it is and the answer it gave me was: "a ...
4 votes
3 answers
355 views
How to Deploy Machine Learning Model on Wearable Edge Devices?
I have done mostly machine learning with big data, GPUs on EC2 VMs, K8S clusters etc. But this new assignment is on the other end of the scale. Basically, it is a time series forecasting and ...
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1 vote
3 answers
373 views
Is Feeding a Watchdog Timer from an Interrupt Service Routine a Bad Practice?
In an embedded system, I require a watchdog to be able to pass ESD qualifications. Having no experience with watchdogs, I went through this Memfault article. I liked the events "registration"...
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0 votes
1 answer
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How to resolve configuration of a peripheral driver in C++?
I have been solving following architectural problem. I have been implementing a software driver for a fpga peripheral (basically a digital filter with two filtering algorithms). The main goals of the ...
- 169
2 votes
1 answer
295 views
Embedded C++ classes vs. namespaced free functions
I am using C++ in an embedded environment (ESP32) and have been playing around with different ways of structuring my program. The program isn't super complex but not so simple that it could all be ...
1 vote
2 answers
381 views
How to deal with boolean or enum variables used to decide code flow?
I am working on algorithm implemented in C++ that maintains several enum types. Say 3 to 4 enum types each with at least 4 different values. Plus the code maintains several boolean variables. The code ...
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-1 votes
1 answer
252 views
What are ARM64 system registers
I see in arm reference manuals they give info about certain configurations such as HCR_EL2, Hypervisor Configuration Register (HCR_EL2), and what I read in books and reference manual is that ARM64 ...
- 99
2 votes
4 answers
494 views
Watchdog/recovery mechanism for realtime embedded system (using heartbeat, exceptions and Posix signals)?
We have a large(ish) real-time embedded system. It's VxWorks, if that makes any difference. It has some C code in DKMs, but is 95%+ in C++. It has absolutely no exception handling, nor Posix signal ...
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2 votes
2 answers
407 views
Optimizing Flash Memory Writes in Embedded Systems with Unpredictable Power Loss
I'm working on an embedded C++ project that involves logging certain types of statistical data (like successful accesses, failed attempts, and other events) to the flash memory (just incrementing ...
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1 vote
1 answer
354 views
How to return a result from an active object state machine
I frequently use the concept of Active Objects (https://www.state-machine.com/active-object) combined with state machines when designing code. The key idea behind these is that only "events"...
- 799
4 votes
1 answer
341 views
Dealing with global variables required by badly-written library
I am working with a library that is somewhat poorly written. In order to function, it requires several global variables to be declared and sometimes even maintained by my own code. I really don't ...
1 vote
3 answers
250 views
TDD - What to do when adding a new function on a dependency causes many previous tests to fail?
I was programming today and encountered something that just feels like I'm doing something wrong (maybe?). I've encountered this situation before, but I wanted to reach out and ask if there's a better ...
- 121
0 votes
0 answers
85 views
Decoupling a Configuration API in an Embedded Framework
In my embedded project I am designing a framework that allows the user to create widgets at compile time. All widgets must provide the same base functionality. Further, there are multiple widget ...
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