Had this discussion with someone who seemed to have worked on the F-22 over a decade ago when the program was cancelled, but apparently the computer architecture of the F-22 is closed source which severely limits its upgradeability. Trying to completely redo the architecture to be more open source and upgradeable meanwhile would entail costs that would be difficult to justify.
J-20 5th Generation Fighter VII
- Thread starter siegecrossbow
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F-22 is probably VxWorks with software written in Ada or something like that. Arianespace uses open source Ada compiler GNAT for Ariane 5 avionics software. GCC has Ada support. So the idea you need to use closed source Ada compiler in a MIC avionics project is IMHO misguided. And the OS could be any of a number of OSes either open or closed source.
My professor worked on the F-22 program in the 90s and he said it was ADA back then.
USAF mandates Ada on all planes. Only f35 is written in c++.
I think JF-17 is C++. Not sure about J-20 or J-10.
A software language is just different format of "if then else end". Getting familiar with it is not a problem. The challenge is to build competence of understanding the mechanism of the real time OS that the compiled machine code runs on, such mechanism of task switching, data sharing, sequence of executions etc. Also need to master the compiler, so one knows exactly how every piece of humane readable source code is translated to machine code.
One can take a week of study to begin writing code in a new language and it will run. But it takes years to actually make the whole software to work efficiently, robustly. That is the reason why F-35 switches to C based because its code size is much much larger than any predecessors and ADA is simply a language that not many people is good at due to its narrow application.
At the time of ADA, real time OS is a new thing, C based language was not suitable for it because of the compiler. Today, after decades of development in both C compilers and many real time OS have matured to the point that ADA and its serving OS are unnecessary.
One can take a week of study to begin writing code in a new language and it will run. But it takes years to actually make the whole software to work efficiently, robustly. That is the reason why F-35 switches to C based because its code size is much much larger than any predecessors and ADA is simply a language that not many people is good at due to its narrow application.
At the time of ADA, real time OS is a new thing, C based language was not suitable for it because of the compiler. Today, after decades of development in both C compilers and many real time OS have matured to the point that ADA and its serving OS are unnecessary.
As a software engineer your explanation is a vastly simplified version of how things work.
As an expert reader, I find that sentence confusing. Who exactly is the software engineer?
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