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Merge pull request #4 from pimoroni/example/uinput-touch
UInput touch example for #3
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#!/usr/bin/env python | ||
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import os | ||
import signal | ||
import sys | ||
import time | ||
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from datetime import datetime | ||
from threading import Timer | ||
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try: | ||
from evdev import uinput, UInput, AbsInfo, ecodes as e | ||
except ImportError: | ||
exit("This service requires the evdev module\nInstall with: sudo pip install evdev") | ||
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try: | ||
import RPi.GPIO as gpio | ||
except ImportError: | ||
exit("This service requires the RPi.GPIO module\nInstall with: sudo pip install RPi.GPIO") | ||
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try: | ||
import smbus | ||
except ImportError: | ||
exit("This service requires the smbus module\nInstall with: sudo apt-get install python-smbus") | ||
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os.system("sudo modprobe uinput") | ||
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rotate = False | ||
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try: | ||
config = open("/boot/config.txt").read().split("\n") | ||
for option in config: | ||
if option.startswith("display_rotate="): | ||
key, value = option.split("=") | ||
if value.strip() == "0": | ||
rotate = True | ||
except IOError: | ||
pass | ||
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DAEMON = False | ||
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CAPABILITIES = { | ||
e.EV_ABS : ( | ||
(e.ABS_X, AbsInfo(value=0, min=0, max=480, fuzz=0, flat=0, resolution=1)), | ||
(e.ABS_Y, AbsInfo(value=0, min=0, max=480, fuzz=0, flat=0, resolution=1)), | ||
(e.ABS_MT_SLOT, AbsInfo(value=0, min=0, max=1, fuzz=0, flat=0, resolution=0)), | ||
(e.ABS_MT_TRACKING_ID, AbsInfo(value=0, min=0, max=65535, fuzz=0, flat=0, resolution=0)), | ||
(e.ABS_MT_POSITION_X, AbsInfo(value=0, min=0, max=480, fuzz=0, flat=0, resolution=0)), | ||
(e.ABS_MT_POSITION_Y, AbsInfo(value=0, min=0, max=480, fuzz=0, flat=0, resolution=0)), | ||
), | ||
e.EV_KEY : [ | ||
e.BTN_TOUCH, | ||
] | ||
} | ||
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PIDFILE = "/var/run/hyperpixel2r-touch.pid" | ||
LOGFILE = "/var/log/hyperpixel2r-touch.log" | ||
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if DAEMON: | ||
try: | ||
pid = os.fork() | ||
if pid > 0: | ||
sys.exit(0) | ||
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except OSError as e: | ||
print("Fork #1 failed: {} ({})".format(e.errno, e.strerror)) | ||
sys.exit(1) | ||
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os.chdir("/") | ||
os.setsid() | ||
os.umask(0) | ||
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try: | ||
pid = os.fork() | ||
if pid > 0: | ||
fpid = open(PIDFILE, 'w') | ||
fpid.write(str(pid)) | ||
fpid.close() | ||
sys.exit(0) | ||
except OSError as e: | ||
print("Fork #2 failed: {} ({})".format(e.errno, e.strerror)) | ||
sys.exit(1) | ||
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si = file("/dev/null", 'r') | ||
so = file(LOGFILE, 'a+') | ||
se = file("/dev/null", 'a+', 0) | ||
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os.dup2(si.fileno(), sys.stdin.fileno()) | ||
os.dup2(so.fileno(), sys.stdout.fileno()) | ||
os.dup2(se.fileno(), sys.stderr.fileno()) | ||
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def log(msg): | ||
sys.stdout.write(str(datetime.now())) | ||
sys.stdout.write(": ") | ||
sys.stdout.write(msg) | ||
sys.stdout.write("\n") | ||
sys.stdout.flush() | ||
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try: | ||
ui = UInput(CAPABILITIES, name="Touchscreen", bustype=e.BUS_USB) | ||
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except uinput.UInputError as e: | ||
sys.stdout.write(e.message) | ||
sys.stdout.write("Have you tried running as root? sudo {}".format(sys.argv[0])) | ||
sys.exit(0) | ||
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from hyperpixel2r import Touch | ||
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last_status = [False, False] | ||
last_status_xy = [(0, 0), (0, 0)] | ||
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def write_status(touch_id, x, y, touch_state): | ||
if touch_id > 1: # Support touches 0 and 1 | ||
return | ||
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if touch_state: | ||
ui.write(e.EV_ABS, e.ABS_MT_SLOT, touch_id) | ||
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if not last_status[touch_id]: # Contact one press | ||
ui.write(e.EV_ABS, e.ABS_MT_TRACKING_ID, touch_id) | ||
ui.write(e.EV_ABS, e.ABS_MT_POSITION_X, x) | ||
ui.write(e.EV_ABS, e.ABS_MT_POSITION_Y, y) | ||
ui.write(e.EV_KEY, e.BTN_TOUCH, 1) | ||
ui.write(e.EV_ABS, e.ABS_X, x) | ||
ui.write(e.EV_ABS, e.ABS_Y, y) | ||
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elif not last_status[touch_id] or (x, y) != last_status_xy[touch_id]: | ||
if x != last_status_xy[touch_id][0]: ui.write(e.EV_ABS, e.ABS_X, x) | ||
if y != last_status_xy[touch_id][1]: ui.write(e.EV_ABS, e.ABS_Y, y) | ||
ui.write(e.EV_ABS, e.ABS_MT_POSITION_X, x) | ||
ui.write(e.EV_ABS, e.ABS_MT_POSITION_Y, y) | ||
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last_status_xy[touch_id] = (x, y) | ||
last_status[touch_id] = True | ||
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ui.write(e.EV_SYN, e.SYN_REPORT, 0) | ||
ui.syn() | ||
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elif not touch_state and last_status[touch_id]: | ||
ui.write(e.EV_ABS, e.ABS_MT_SLOT, touch_id) | ||
ui.write(e.EV_ABS, e.ABS_MT_TRACKING_ID, -1) | ||
ui.write(e.EV_KEY, e.BTN_TOUCH, 0) | ||
last_status[touch_id] = False | ||
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ui.write(e.EV_SYN, e.SYN_REPORT, 0) | ||
ui.syn() | ||
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log("HyperPixel2r Touch daemon running...") | ||
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touch = Touch() | ||
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@touch.on_touch | ||
def handle_touch(touch_id, x, y, state): | ||
write_status(touch_id, x, y, state) | ||
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signal.pause() | ||
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log("HyperPixel2r Touch daemon shutting down...") | ||
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ui.close() |