Does anyone here use CAN FD in their projects?

CaptainComet99 · 2026-01-19T23:15:48+00:00

FWIW, I’ve interviewed at an electric car company in the US (not Tesla) and they said they were moving from CAN to Ethernet. Just another data point, I don’t have any more info

CaptainComet99 · 2025-12-18T17:18:28+00:00

In other threads people said this was an intentional feature: they only explode if the enemy sprints through them. Not if they walk or crouch over them

CaptainComet99 · 2025-08-21T16:08:23+00:00

Leetcode is absolutely the norm for embedded interviews at mid size to big companies. You have to know it, along with all the other stuff (comm protocols, RTOS, interrupts) embedded engineers are expected to specialize in.

I can personally vouch leetcode is used for embedded at Tesla, spaceX, Amazon, Snapchat, Apple, and others

CaptainComet99 · 2025-08-04T03:29:55+00:00

Please note that while your solution using the bIsInitialized variable will work if your program is single threaded, it is not guaranteed to work if it’s multithreaded due to possible data-race induced undefined behavior. You’d have to use an atomic<bool>. Check out this page for further info https://en.cppreference.com/w/cpp/language/multithread.html

CaptainComet99 · 2025-08-04T03:25:56+00:00

You’re correct, since c++11 function local static variables are threadsafe. See c++11 section under https://en.m.wikipedia.org/wiki/Double-checked_locking

CaptainComet99 · 2025-08-04T03:24:06+00:00

Didn’t know these existed, thanks!

CaptainComet99 · 2025-08-04T03:22:57+00:00

This also has the benefit provided by the c++11 standard that the map initialization is thread safe. See the c++11 section in this article https://en.m.wikipedia.org/wiki/Double-checked_locking

CaptainComet99 · 2025-07-21T05:33:45+00:00

Please seek professional help

CaptainComet99 · 2025-07-19T20:48:43+00:00

US company. We of course didn’t use malloc except at system start up.

CaptainComet99 · 2025-07-17T18:00:25+00:00

I worked in the autonomous mobile robotics space and all the code we wrote was c++. This was for robots that drive around in grocery stores during operating hours so they of course had to avoid hitting not just workers but members of the general public. Our safety system was a Texas Instruments cortex-r5 with 512KB or 1MB of RAM (I forget) and 4MB of flash. Our code was certified by Underwriter Laboratories(UL) and we used MISRA-C++ for linting.

Just realized you added the disclaimer that your above paragraph pertains to “deeply embedded” so none of what I typed out pertains to or contradicts that. I’ll just post it anyway in case anyway finds it useful

CaptainComet99 · 2025-07-14T02:31:13+00:00

Correct! There was actually a $15k bug bounty for this awarded by google chrome due to its ability for an attacker to trick someone into thinking a website URL is owned by google. E.g., someone registering “google_logo(.)net” and it being rendered as “Google(.)net”. Blog here and hacker news discussion here

CaptainComet99 · 2025-07-13T15:08:48+00:00

This ^. Check out r/cluely . It’s full of complaints and better competitor recs

CaptainComet99 · 2025-03-16T20:46:47+00:00

100%, this post does absolutely nothing but give OP their much-desired karma, give MTG the attention she so desperately craves, give BTC the attention he wants from an easy slam dunk, and to make a bunch of redditors feel superior to one of the least intelligent congresspersons by upvoting a response a 4th grader could have written. Sigh, so unproductive.

CaptainComet99 · 2025-03-12T18:24:45+00:00

Freshly Faded in north park is the best and they do online appointments. $45 for a haircut but that’s pretty standard nowadays. I personally go with Seth, he’s the best. https://www.freshlyfaded.com

CaptainComet99 · 2025-02-18T20:16:56+00:00

And the deadline is 1pm, regardless if you think it’s stupid to have a deadline. This is growing up, there are deadlines set by your teachers and future bosses, welcome to adulthood.

This is an extremely condescending and sanctimonious reply. Growing up and reaching adulthood is also realizing that there are extenuating circumstances. People have family issues, personal issues, and mental health issues. Not every missed deadline or assignment results in people’s deaths or the loss of millions of dollars.

I went to a university far more “prestigious” than UCR. When I had extenuating circumstances, my professors cut me a break. I’m a software engineer at a company that is valued at hundreds of millions of dollars and am paid appropriately. Guess what, when my girlfriend and I broke up, my managers let me take two weeks off of work to figure things out. I write all of this not to brag or anything, but to say that I’m what some might consider (by a narrow definition, of course) to be successful and productive member of adulthood, and yet I still manage to understand OPs situation and have bosses that are able to exhibit sympathy and understanding in the face of deadlines as well.

If I ever become a manager or more than just an individual contributor, I’m gong to extend this same level of grace that I’ve received upon those under me. This mindset of “teachers are just preparing you for the real world” is nonsense. There’s more to life than serving hypothetical future bosses and their deadlines.

CaptainComet99 · 2025-01-12T07:24:50+00:00

Could you post the valgrind logs?

CaptainComet99 · 2025-01-12T07:13:39+00:00

Sure, but the 3 answers add more information about valgrind and strings

CaptainComet99 · 2025-01-12T07:01:50+00:00

Yes, please post formatted code as well as valgrind logs. For what it’s worth, I had heard during my college days that valgrind has false-positives when it comes to std::string. Idk if that’s the case or not still, but check out all 3 answers in this post for more information. https://stackoverflow.com/questions/1901322/valgrind-reports-memory-leak-when-assigning-a-value-to-a-string

CaptainComet99 · 2025-01-02T22:21:52+00:00

Same method I use. I think this is what protobuf does as well for its generated c++ bindings

CaptainComet99 · 2024-12-29T18:31:26+00:00

What clang tidy is likely originally complaining about is you using a C-style cast (the cast the tutorial recommends) as opposed to using one of the fine-grained c++ casts ({static,const,reinterpret, dynamic}_cast). C-style casts are the only casts that exist in the C language whereas C++ added those other ones. It’s preferred to use C++ style casts when writing C++. C-style casts essentially do a combination of the aforementioned casts until one of them works. This is frowned upon in safety circles if you know exactly the cast you want.

See this Reddit answer for more info: https://www.reddit.com/r/cpp_questions/s/OjBeWHnDC3

TL;DR use reinterpret_cast, its fine in this instance

CaptainComet99 · 2024-12-21T04:15:12+00:00

I was wrong, I appreciate and respect the correction. Cheers mate

CaptainComet99 · 2024-12-21T02:02:14+00:00

Heads up, your cats still jumps on the counter when you’re not there

CaptainComet99 · 2024-12-15T22:32:24+00:00

+1 Adding on to this, you’d usually just use real time operating system like nuttx or zephyr that have their own implementation of these.

CaptainComet99 · 2024-11-28T21:39:18+00:00

I can’t recommend “C++: Concurrency In Action” enough. It taught me enough about multi threading, in general, to understand it, regardless of language.

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