GamePad.py

#!/usr/local/bin/python
import struct
import time
import sys
import uinput
import subprocess

kbd = subprocess.Popen("grep -E  'Handlers|EV=' /proc/bus/input/devices | grep -B1 'EV=120013' | grep -Eo 'event[0-9]+'",shell=True,stdout=subprocess.PIPE,stderr=subprocess.STDOUT).stdout.read().replace("\n","")

infile_path = "/dev/input/" + kbd

#long int, long int, unsigned short, unsigned short, unsigned int
FORMAT = 'llHHI'
EVENT_SIZE = struct.calcsize(FORMAT)

#open file in binary mode
in_file = open(infile_path, "rb")

events = (
        uinput.BTN_A,
        uinput.BTN_B,
        uinput.BTN_X,
        uinput.BTN_Y,
        uinput.BTN_TL,
        uinput.BTN_TR,
        uinput.ABS_X + (-1, 1, 0, 0),
        uinput.ABS_Y + (-1, 1, 0, 0),
        uinput.ABS_Z + (-1, 1, 0, 0),
        uinput.ABS_RZ + (-1, 1, 0, 0),
        )
        
buttons = {
        38  : uinput.BTN_A,
        28  : uinput.BTN_A,
        25  : uinput.BTN_B,
        1   : uinput.BTN_B,
        
        37  : uinput.BTN_X,
        24  : uinput.BTN_Y,
        
        4   : uinput.BTN_TL,
        10  : uinput.BTN_TR,
    }
axes0 = {
        32  : [1,0], # Right
        30  : [-1,0],# Left
        17  : [0,-1],# Up
        31  : [0,1], # Down
}

axes1 = {
        106 : [1,0], # Right
        105 : [-1,0],# Left
        103 : [0,-1],# Up
        108 : [0,1], # Down
}

print "+---------------------------+"
print "|         ChromePad         |"
print "|           KEYMAP          |"
print "+---------------------------+"
print "| W           | L STICK UP  |"
print "| S           | L STICK DWN |"
print "| A           | L STICK LFT |"
print "| D           | L STICK RHT |"
print "| UP ARROW    | R STICK UP  |"
print "| DWN ARROW   | R STICK DWN |"
print "| LFT ARROW   | R STICK LFT |"
print "| RT ARROW    | R STICK DWN |"
print "| L/ENTER     | A           |"
print "| P/ESC       | B           |"
print "| K           | X           |"
print "| O           | Y           |"
print "| 3           | LT          |"
print "| 9           | RT          |"
print "+---------------------------+"

prevcode = -1
prevval = -1
with uinput.Device(events) as device:
    print "ChromePad Started. Start playing !!"
    event = in_file.read(EVENT_SIZE)
    while event:
        (tv_sec, tv_usec, type, code, value) = struct.unpack(FORMAT, event)
        if (type != 0 or code != 0 or value != 0) and (type == 1 and (prevcode != code or prevval != value) and value != 2 ):
            if (code in axes0):
                x,y = axes0[code]
                if y == 0:
                    device.emit(uinput.ABS_X, x * value)
                else:
                    device.emit(uinput.ABS_Y, y * value)
            elif (code in axes1):
                x,y = axes1[code]
                if y == 0:
                    device.emit(uinput.ABS_Z, x * value)
                else:
                    device.emit(uinput.ABS_RZ, y * value)
            elif(code in buttons):
                device.emit(buttons[code],value)
            prevcode = code
            prevval = value
        try:
                event = in_file.read(EVENT_SIZE)
        except:
                print "\nExiting ChromePad..."
                exit()

in_file.close()