{"id":19151,"date":"2022-11-05T15:20:05","date_gmt":"2022-11-05T09:50:05","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-does-raspberry-pi-need-an-os-to-work\/"},"modified":"2022-11-05T15:20:05","modified_gmt":"2022-11-05T09:50:05","slug":"solved-why-does-raspberry-pi-need-an-os-to-work","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-does-raspberry-pi-need-an-os-to-work\/","title":{"rendered":"[Solved] Why does Raspberry Pi need an OS to work?"},"content":{"rendered":"

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Long story short, the Pi is too complex hardware-wise to operate without an OS<\/strong> (for the vast majority of tasks, anyway).<\/p>\n

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An operating system<\/a> is essentially an environment for your program to work in. It provides standardized means to use and manage hardware, interrupts, storage (incl. filesystems), I\/O etc. What is more inportant, it does all the non task-specific heavy lifting in those tasks. So, you yourself only have to implement task-specific logic.<\/p>\n

Without an operating system, you’ll have to include all that functionality (or rather, the part of it that your task-specifc logic needs) into your program (that is called a “bare bones” programming environment). If the hardware is simple and unified enough (e.g. a specific model of a microcontroller), that it easy enough. But if the task of operating the hardware is complex enough and\/or you need to support many different hardware configurations, it simply becomes too taxing to implement all that by hand each time.<\/p>\n

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For example, you said you’d like to write your program in Python.<\/p>\n

A Python program doesn’t exist in vacuum. It’s run by a Python interpreter — that needs to already be installed on the system so that you can feed your program to it. Likewise, the interpreter itself is written for a specific environment. E.g. CPython uses the C standard library<\/a>. That library in turn may delegate work to whatever environment it<\/em> is written to work in — e.g. system calls<\/a> of a specific OS. Finally, the OS, run by the system’s CPU, interacts with peripheral devices in whatever ways the specific hardware environment is designed to (I\/O ports, memory-mapped I\/O<\/a>, various standardized I\/O protocols (like SATA<\/a>) which typically consist of reading and writing hardware registers in devices and handling interrupts from them and the CPU itself; large data transfers are nowadays usually done with DMA<\/a>, a session of which the OS logic still needs to set up.)<\/p>\n

So if you’re going to work without an OS, you’ll need to implement any of those layers yourself first that would work in a Pi bare bones environment — all just to run a simple Python program. You can take a look at Raspberry Pi Bare Bones – OSDev Wiki<\/a> to get an idea of what that experience is like.<\/p>\n<\/p><\/div>\n

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solved Why does Raspberry Pi need an OS to work? <\/p>\n","protected":false},"excerpt":{"rendered":"

[ad_1] Long story short, the Pi is too complex hardware-wise to operate without an OS (for the vast majority of tasks, anyway). An operating system is essentially an environment for your program to work in. 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