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Let's imagine you have a real-time problem that you can solve with the Raspberry Pi hardware but you need something much faster than an Arduino. Is it possible to bypass the OS of a Raspberry Pi to have used some kind of bootloader like an Arduino, and run with the same structure in real-time as with Arduino (i.e. no time-sharing), but much faster?

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    Have a look at Teensy 4.0, it'll be much easier to set up and program than a bare-metal RPi. – tttapa Jan 8 at 19:05
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    What task do you actually want implemented? – CoderMike Jan 8 at 22:21
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    First, understanding the limits of what you can and what you can't do. I've tried myself with arduino, but for some applications I found it quite slow. – Camion Jan 8 at 22:40
  • Yes, Anono is very slow, get a stm32 board which is 10 times faster then Anono. Anono just makes you stupid. You can let one Rpi coordinate multiple STMs. aliexpress.com/w/wholesale-stm32-arm.html – tlfong01 10 mins ago – tlfong01 Jan 9 at 1:33
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That is very much the premise of Ultibo.

What is Ultibo?

Imagine if you could have the simplicity and freedom of Arduino with the power and features of a Raspberry Pi. With the ease of a microcontroller and the flexibility of a real computer, Ultibo gives you a platform for creating anything without the limitations of a traditional operating system.

If Ultibo is not what you want there are plenty of other bare-metal (no operating system) examples for the Raspberry Pi.

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