Is there a method that allows me to find out how many clock cycles a certain piece of code will use on a Leonardo? For example, I could imagine a simulator that runs a sketch and keeps track of the number of clock cycles used. Note that I don't own an Arduino yet, and I've never worked with one. I…

AWOL: Cycle counts are detailed in the processor data sheet, available from the Atmel website OK, so the tool would be my brain and the data sheet which indeed lists the clock cycles. Machine instructions are executed strictly serial, i.e. nothing parallel, right? After all, they write: "Up to 1…

The problem is that it's not obvious how many assembler program instructions will be generated from C++ code. This link might be useful Arduino Forum ...R

Robin2: The problem is that it's not obvious how many assembler program instructions will be generated from C++ code. That much I know. :slight_smile: If there is no automatic tool, my idea is to look at the machine code and check how many cycles the instructions take according to the data sheet…

How accurate timing you need? microseconds() just before and after critical section of code 'd provide 3-4 usec accuracy, may be better down to 1usec. there are 3 timers you may use, read TCNT0/1/2 - accuracy to 1 cycle, same read before and after, subtract. Depends on board, there may be more tim…

Magician: microseconds() just before and after critical section of code 'd provide 3-4 usec accuracy, may be better down to 1usec. That's an option. But I'd like to run code in a Leonardo simulator if some such thing exists. Then the timing would probably be way off compared to the real thing. …

Find out number of clock cycles of code? (to predict execution time)

Projects Programming

system April 13, 2013, 4:49pm 2

Cycle counts are detailed in the processor data sheet, available from the Atmel website

Topic		Replies	Views
Excel-based automation timer & cycle logic generator (feedback welcome) Products and Services	11	132	January 16, 2026
How does Arduino count time? General Guidance	9	1210	November 11, 2023
Calcolo dei cicli macchina in interrupt Software	12	233	January 6, 2025
Cronometro non è preciso Software	11	190	April 25, 2025
Interrupt bottleneck in Arduino UNO ? [Solved] General Guidance	94	1528	July 15, 2025

Find out number of clock cycles of code? (to predict execution time)

Related topics