anti-recoil.ino

#include <DirectIO.h>
#include "HID-Project.h"

/*
 * This is the pin that will tie into the mouse.
 * The button on the mouse MUST tie to ground when pressed, 
 * otherwise this sketch will need to be modified appropriately..
 */
Input<4> my_input(false);

/*
   Benchmark results were determined by using the following projecct-unrelated website: https://cookie.riimu.net/speed/
   THESE ARE ABSOLUTE MINIMUMS FOR WINDOWS(Tested on Windows 10 Pro)

   Refresh rates to MS ratio translations(REL / HLD)
   10 / 10 = smooth 48Hz
   9 / 10 = smoothed 48 to 52Hz
   8 / 10 = semi-smooth 52Hz
   7 / 10 = smooth 56Hz
   6 / 10 = semi-smooth 58 to 60Hz

*/

/*
    P90: 30 / 36 with 9 down at each run

*/
int delayClickRelAmt = 30;
int delayClickHldAmt = 36;
//#define maxMoveAmt 4

void setup() {
  digitalWrite(4, HIGH);
  //Serial.begin(115200);
}

void loop() {
  int currState = my_input;
  //Serial.println(currState);
  if (currState == 0) {
    Mouse.press(1);
    delay(delayClickHldAmt);
    Mouse.release(1);
    //delay(delayClickRelAmt);
    // P90 anti-coil :D
    Mouse.move(0, 9);
    Mouse.move(-1, 0);
    Mouse.move(1, 0);
    Mouse.move(0, -1);
    Mouse.move(0, 1);
    Mouse.release(1);
  }
  delay(delayClickRelAmt);
}

This is a basic sketch to allow limited recoil and rapid fire with the P90 on Battlefield 4 in or out of semi-auto fire(there shouldn't really be a difference in fire rate, although I haven't tweaked these values enough to verify).

This does require an Arduino Leonardo or other ATMega32U4-based MCU mouse!
Other mice are untested!
You should be able to easily expand the amount of macro assignments using this sketch.