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#!python3
import sys
import evdev
import contextlib
keymap = {
evdev.ecodes.KEY_1: (b'&', b'1'),
evdev.ecodes.KEY_2: (b'?', b'2'),
evdev.ecodes.KEY_3: (b'"', b'3'),
evdev.ecodes.KEY_4: (b'\'', b'4'),
evdev.ecodes.KEY_5: (b'(', b'5'),
evdev.ecodes.KEY_6: (b'-', b'6'),
evdev.ecodes.KEY_7: (b'?', b'7'),
evdev.ecodes.KEY_8: (b'_', b'8'),
evdev.ecodes.KEY_9: (b'?', b'9'),
evdev.ecodes.KEY_0: (b'?', b'0'),
evdev.ecodes.KEY_MINUS: (b')', '°'.encode('utf8')),
evdev.ecodes.KEY_EQUAL: (b'=', b'+'),
evdev.ecodes.KEY_Q: b'a',
evdev.ecodes.KEY_W: b'z',
evdev.ecodes.KEY_E: b'e',
evdev.ecodes.KEY_R: b'r',
evdev.ecodes.KEY_T: b't',
evdev.ecodes.KEY_Y: b'y',
evdev.ecodes.KEY_U: b'u',
evdev.ecodes.KEY_I: b'i',
evdev.ecodes.KEY_O: b'o',
evdev.ecodes.KEY_P: b'p',
evdev.ecodes.KEY_A: b'q',
evdev.ecodes.KEY_S: b's',
evdev.ecodes.KEY_D: b'd',
evdev.ecodes.KEY_F: b'f',
evdev.ecodes.KEY_G: b'g',
evdev.ecodes.KEY_H: b'h',
evdev.ecodes.KEY_J: b'j',
evdev.ecodes.KEY_K: b'k',
evdev.ecodes.KEY_L: b'l',
evdev.ecodes.KEY_SEMICOLON: b'm',
evdev.ecodes.KEY_Z: b'w',
evdev.ecodes.KEY_X: b'z',
evdev.ecodes.KEY_C: b'c',
evdev.ecodes.KEY_V: b'v',
evdev.ecodes.KEY_B: b'b',
evdev.ecodes.KEY_N: b'n',
evdev.ecodes.KEY_M: (b',', b'?'),
evdev.ecodes.KEY_COMMA: (b';', b'.'),
evdev.ecodes.KEY_DOT: (b':', b'/'),
evdev.ecodes.KEY_SLASH: b'!',
evdev.ecodes.KEY_SPACE: b' ',
}
kpkeys_map = {
evdev.ecodes.KEY_KP0: '0',
evdev.ecodes.KEY_KP1: '1',
evdev.ecodes.KEY_KP2: '2',
evdev.ecodes.KEY_KP3: '3',
evdev.ecodes.KEY_KP4: '4',
evdev.ecodes.KEY_KP5: '5',
evdev.ecodes.KEY_KP6: '6',
evdev.ecodes.KEY_KP7: '7',
evdev.ecodes.KEY_KP8: '8',
evdev.ecodes.KEY_KP9: '9',
}
def list_devices(name=None):
devices = [evdev.InputDevice(fn) for fn in evdev.list_devices()]
for dev in devices:
#print(dev.fn, dev.name, dev.phys)
if name and name == dev.name:
return dev
def read_events(dev=None):
dev = evdev.InputDevice(dev.fn)
dev.grab()
line = ''
shift = False
active_keys = dict.fromkeys((
42, # KEY_LEFTSHIFT
56, # KEY_LEFTALT
), False)
accumulate = []
bindata = []
unidata = []
try:
for event in dev.read_loop():
if event.type == evdev.ecodes.EV_KEY:
data = evdev.categorize(event)
#print(data)
#key = scancodes[data.scancode] if data.scancode in scancodes else str(data.scancode)
#print('scancode', data.scancode, 'up' if data.keystate ==
# data.key_up else 'down')
if data.scancode in active_keys:
active_keys[data.scancode] = data.keystate == data.key_down
if data.scancode == 56 and data.keystate == data.key_up:
value = int(''.join(accumulate))
accumulate = []
print('value', value, bytes([value]))
bindata.append(bytes([value]))
with contextlib.suppress(UnicodeDecodeError):
unidata.append(bytes([value]).decode('utf8'))
for i in range(6):
with contextlib.suppress(UnicodeDecodeError):
unidata.append(b''.join(bindata[-i:] + [bytes([value])])
.decode('utf8'))
break
elif data.keystate == data.key_up:
continue
elif data.scancode == 28: # keycode: KEY_ENTER
print('end of data scan')
bindata = b''.join(bindata)
print('bytes', bindata)
#print(bindata.decode('utf8'))
bindata = []
else:
if active_keys[56]:
# if KEY_LEFTALT down, then accumulate binary data
accumulate.append(kpkeys_map[data.scancode])
elif data.scancode in keymap:
key = keymap[data.scancode]
if active_keys[42]: # KEY_LEFTSHIFT
if len(key) > 1:
key = key[1]
else:
key = key.upper()
else:
if len(key) > 1:
key = key[0]
bindata.append(key)
unidata.append(key.decode('utf8'))
else:
print(active_keys, data)
finally:
dev.ungrab()
dev = list_devices(name='The Code Corporation CR1000')
print(dev)
read_events(dev)
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