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Which one is better to get started with register level embedded c coding? Also which one is used professionally?

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  • 1) doesn't matter. 2) Arduino shouldn't be used professionally.
    – Gerben
    Aug 23 '18 at 15:22
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I actually wouldn’t recommend either for professionally developing for Atmel chips. Although Atmel Studio is a nice enough IDE (the simulator is amazing!), it does make it very difficult to unit test your code or to set up a build server. I would personally recommend you set up a Make (or possibly CMake) based setup directly on top of the avr-gcc tool chain and then simply use the text editor of your choice.

As for learning about programming against raw registers, I have to recommend Atmel Studio and one of their XPlained evaluation boards. Atmel Studio includes a simulator that actually shows you, bit by bit, the current state of the registers.

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  • How do you set up a Make based setup directly on top of the avr-gcc tool chain. i don't know how to go about doing it. So, it would be great if you could give some insight on how to do it.
    – Roshan
    Aug 24 '18 at 10:47
  • Here’s an avr template I created and a digital thermometer project I’ve been working on based on it.
    – RubberDuck
    Aug 24 '18 at 10:49
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Atmel Studio for professional. Arduino is for fun and is normally the first step into embedded c programming using the atmega328 (Arduino)

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