To start off: this might be a duplicate, but i can't seem to find a definitive answer on this question after having searched for it on google.
For a project i am designing a script that makes 2 ATMega328p chips communicate. At this moment i'm testing the best speed to do this, but my goal is to achieve really high baudrates. I have plenty of experience with making code efficient, but not with the memory management part. The problem:
I want to store a multiple of 8 bits (ex.: 48 bits). My first thought was to use an array of length 6 and type
The ATmega328p is a 8bit processor. All of its instructions are 8bit. Nothing will be faster than simply having an uint8_t array.
What you can do is, when you compile, look at your .lss file, it will show you the assmebly code, then you can look up the AVR instruction set and see the clock cycles each one will take. I think you will find using a uint64_t will just add unncessary overhead unless you are very careful with the way you are putting the bytes into it.