evdev

I use evdev to wait for button key press on any joystick when displaying Image. Thing is my old code only worked for one joystick. Now I got two. This is about getting joystick device paths and using python and evdev to display image and wait for button key press to close image.

$lsusb

Bus 001 Device 004: ID 0079:0006 DragonRise Inc. PC TWIN SHOCK Gamepad

Bus 001 Device 005: ID 0079:0006 DragonRise Inc. PC TWIN SHOCK Gamepad

Bus 001 Device 006: ID 0424:7800 Standard Microsystems Corp.

Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub

Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$cd /dev/input

pi@finalfight:/dev/input $ ls -l

total 0

drwxr-xr-x 2 root root 80 Mar 14 19:10 by-id

drwxr-xr-x 2 root root 120 Mar 14 19:10 by-path

crw-rw----+ 1 root input 13, 64 Mar 14 19:10 event0

crw-rw----+ 1 root input 13, 65 Mar 14 19:10 event1

crw-rw----+ 1 root input 13, 0 Mar 14 19:10 js0

crw-rw----+ 1 root input 13, 1 Mar 14 19:10 js1

crw-rw---- 1 root input 13, 63 Mar 14 19:10 mice

pi@finalfight:~/py $ python3 listdevices.py

/dev/input/event1 DragonRise Inc. Generic USB Joystick usb-3f980000.usb-1 .1.3/input0

/dev/input/event0 DragonRise Inc. Generic USB Joystick usb-3f980000.usb-1 .2/input0

Real Path is

/dev/input/event1

/dev/input/event0

Python Code to wait for Key Press On two Joysticks

import asyncio, evdev, subprocess, sys

jstick1 = evdev.InputDevice('/dev/input/event0')

jstick2 = evdev.InputDevice('/dev/input/event1')

async def print_events(device):

async for event in device.async_read_loop():

if event.type == evdev.ecodes.EV_KEY:

keyevent = evdev.categorize(event)

if keyevent.keystate == evdev.KeyEvent.key_down:

print(device.path, evdev.categorize(event), sep=': ')

sys.exit(0)

for device in jstick1, jstick2 :

asyncio.ensure_future(print_events(device))

loop = asyncio.get_event_loop()

subprocess.Popen(["fbi","-a","/home/pi/RetroPie/roms/scripts/m/screen/dispAM.jpg"])

print('loop.run_forever()')

loop.run_forever()