From debce9c20c81411f361206b0477e619e92ffbf32 Mon Sep 17 00:00:00 2001
From: VG <vg@devys.org>
Date: Wed, 13 Jan 2016 23:48:21 +0100
Subject: first commit

---
 commands.txt  |   4 ++
 test-evdev.py | 144 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 148 insertions(+)
 create mode 100644 commands.txt
 create mode 100755 test-evdev.py

diff --git a/commands.txt b/commands.txt
new file mode 100644
index 0000000..e80fa67
--- /dev/null
+++ b/commands.txt
@@ -0,0 +1,4 @@
+To generate binary qrcodes:
+
+python3 -c "import sys; sys.stdout.buffer.write(bytes([0, 1, 250]))" | qrencode -8 -t UTF8
+python3 -c "import sys; sys.stdout.buffer.write(bytes([i for i in range(256)]))" | qrencode -8 -t UTF8
diff --git a/test-evdev.py b/test-evdev.py
new file mode 100755
index 0000000..8663ebc
--- /dev/null
+++ b/test-evdev.py
@@ -0,0 +1,144 @@
+#!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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