Hi,

My question certainly stems from the imposter syndrome that I am living right now for no good reason, but when looking to resolve some issues for embedded C problems, I come across a lot of post from people that have a deep understanding of the language and how a mcu works at machine code level.

When I read these posts, I do understand what the author is saying, but it really makes me feel like I should know more about what’s happening under the hood.

So my question is this : how do you rate yourself in your most used language? Do you understand the subtilities and the nuance of your language?

I know this doesn’t necessarily makes me a bad firmware dev, but damn does it makes me feel like it when I read these posts.

I get that this is a subjective question without any good responses, but I’d be interested in hearing about different experiences in the hope of reducing my imposter syndrome.

Thanks

  • farcaller
    2·
    2 months ago

    I don’t think your question relates to the language as much as to the platform. The language of choice is somewhat irrelevant and what you care about is what actually happens under the hood.

    For the likes of java and go you want to have some understanding of what runtime does for the memory allocations and how their GCs work. For python you sometimes end up in the spots where you need to understand what limitations the GIL imposes (even more important now that they are trying to get rid of it). When you run C (or C++ or Rust) on the embedded hardware it really helps to understand what exactly bit flipping does in specific registers and what DMA means for how you write your code.

    You don’t really have to know it all. You can absolutely write code without caring about anything of that and I know plenty software engineers that do. Some people write amazing functional things in java without ever questioning what it does to the machines and what resources you need to run it.

    If you start questioning it, that will only expand your understanding. It’s not a lateral move from e.g. C to Rust where you need to learn a lot to write your code in a memory-safe way, it’s a movement deeper into the stack and what you learn there will be applicable to any language you use for this stack.

    Answering your question: I always feel bad about not understanding some low-level concept. I have stacks of MCU reference docs lying around, printed, highlighted; I have archives with sample code, and hand-annotated CMSIS reversing notes. Embedded world is hard because you can’t just know C and be done with it. You have to know the hardware, too.

    Here’s my advice for you. Make notes of things that you learn from people smarter than you. Create a web of those notes and see where your gaps are. Then, work on learning something in those gaps in particular and see if you can make a blog post or something of your own. When you share what you learn you become one of those people with deep understanding that others look up to. There’s always someone struggling with something that you either know or know how to figure it out.

    • Croquette@sh.itjust.worksOP
      2·
      2 months ago

      What I like about embedded is that it’s between software and hardware, where you have to know both to a certain extent. It kinda feels like being a mad scientist bringing a monster to life. Seeing that my code makes physical actions (lighting a LED or controlling a motor) never seems to get old, even when trivial.

      I am confronted everyday about the things I don’t know because I work in a startup and I am the only one that does what I do. Any issue that I have tells me what I need to learn to fix the issue.

      You are right that for a lot of people, what I do seems like magic and we often forget the extent of our knowledge because it has become innate.

      Thanks for the insight, I appreciate it.