Arduino Microsecond Timer

When micros() just isn't enough.

The microsecond time resolution on 16MHz ATmega-based Arduino boards (Uno, Mega, Nano, etc.) is 4 microseconds, but if you want finer precision, you can use this little timer instead.

Notes:

• Precision: 1μs
• Based on Timer/Counter2
• Respects and restores the current interrupts enabled status

Installation:

• Drop the microsecond_time.h and microsecond_time.cpp files into your Arduino project's src directory:

Project/
    Sketch.ino
    src/
        microsecond-time/
            microsecond_time.h
            microsecond_time.cpp

Usage:

// Include the header
#include "src/microsecond-time/microsecond_time.h"

void setup() {
    // Enable the microsecond timer:
    enableMicrosecondTime();
}

void loop() {
    // Retrieve a 1μs precise time snapshot:
    unsigned long currentMicrosecondTime = microsecondTime();
}

// If you want to disable the microsecond timer at any point:
disableMicrosecondTime();