best programming language for hardware control
What is a hardware description language?
A hardware description language looks much like a programming language such as C or ALGOL; it is a textual description consisting of expressions, statements and control structures. One important difference between most programming languages and HDLs is that HDLs explicitly include the notion of time.
Which programming language is best for a PLC program?
Higher-level programming languages work well for elegant algorithms. State machines, complex math and data manipulation are more easily programmed in text-style languages. More so than ladder, in my experience, I have found the concept of cyclical execution of PLC programs to be a harder concept to grasp for newer graduates.
Which programming language is best for embedded systems?
is the lowest ranking while ★★★★★ is the highest. When selecting a programming language for an embedded system, experts say you must understand the strengths and weaknesses of each language. It’s equally important to know the limitations and goals of your system. For many embedded systems, C or C++ will be the best choices.
Which programming language should I use to create a control system?
While LabVIEW is not the only programming language that can do this as you could directly use C/C++, Fortran, or use a package from Octave/MATLAB (Instrument Control) or Python (pyVISA), it is the easiest. Simulink and XCOS are for modeling control systems graphically (VPL) rather than directly interacting with controllers.
Bitwise Operation Over Register Values in C
In the world of systems programming, where you may find yourself writing hardware drivers or interacting directly with memory-mapped devices, interaction is almost always done through memory-mapped registers provided by the hardware. You typically interact with these things through bitwise operations on some fixed-width numeric type. For instance,
Bitwise Operation Over Register Values in Rust
Continuing with the register above as an example: How might you want to express such a thing in Rust types? You'll start in a similar way, by defining constants for each field's offset—that is, how far it is from the least significant bit—and its mask. A maskis a value whose binary representation can be used to update or read the field from inside
A Rust Implementation For Ease of Use
The first rewrite in Rust is nice, but it's not ideal. You have to remember to bring the mask and offset, and you're calculating them ad hoc, by hand, which is error-prone. Humans aren't great at precise and repetitive tasks—we tend to get tired or lose focus, and this leads to mistakes. Transcribing the masks and offsets by hand, one register at a
Using Rust with Safety in Mind
How can you check that a field's value fits in its prescribed position in a general way? More type-level numbers You can add a Width parameter to Fieldand use it to verify that a given value can fit into the field: Now you can construct a Field only if the given value fits Otherwise, you have None, which signals that an error has occurred, rather
Just Right with Rust: Both Safe and Accessible
Earlier, I called out calculating masks by hand as being problematic, but I just did that same problematic thing—albeit at the type level. While using such an approach is nice, getting to the point when you can write any code requires quite a bit of boilerplate and manual transcription (I'm talking about the type synonyms here). Our team wanted som
Kicking The Tires
What does it look like to use these definitions for a real device? Will the code be littered with type parameters, obscuring any real logic from view? No By using type synonyms and type inference, you effectively never have to think about the type-level part of the program at all. You get to interact with the hardware in a straightforward way and
Decoding Failure Conditions
Depending on your personal pain threshold, you may have noticed that the errors are nearly unintelligible. Take a look at a not-so-subtle reminder of what I'm talking about: The expected typenum::B0 found typenum::B1 part kind of makes sense, but what on earth is the typenum::UInt opensource.com
in Conclusion
Memory-mapped registers are used ubiquitously when interacting with hardware from software, and there are myriad ways to portray those interactions, each of which has a different place on the spectra of ease-of-use and safety. We found that the use of type-level programming to get compile-time checking on memory-mapped register interactions gave us
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