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Implement keyboard-triggered shutdown #16

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Implement keyboard-triggered shutdown #16

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37 changes: 36 additions & 1 deletion user_program/usb4vc_usb_scan.py
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,22 @@
EV_REL = 2
EV_ABS = 3

MOD_CTRL = 1
MOD_SHIFT = 2
MOD_ALT = 4
MOD_SUPER = 8

MODIFIERS = {
evdev.ecodes.KEY_LEFTALT: MOD_ALT,
evdev.ecodes.KEY_RIGHTALT: MOD_ALT,
evdev.ecodes.KEY_LEFTCTRL: MOD_CTRL,
evdev.ecodes.KEY_RIGHTCTRL: MOD_CTRL,
evdev.ecodes.KEY_LEFTSHIFT: MOD_SHIFT,
evdev.ecodes.KEY_RIGHTSHIFT: MOD_SHIFT,
evdev.ecodes.KEY_LEFTMETA: MOD_SUPER,
evdev.ecodes.KEY_RIGHTMETA: MOD_SUPER,
}

SYN_REPORT = 0

REL_X = 0x00
Expand Down Expand Up @@ -752,6 +768,7 @@ def raw_input_event_worker():
last_mouse_msg = []
last_gamepad_msg = None
in_deadzone_list = []
modifier_states = {MODIFIERS[x]: False for x in MODIFIERS}
last_mouse_button_msg = None
print("raw_input_event_worker started")
while 1:
Expand Down Expand Up @@ -789,8 +806,26 @@ def raw_input_event_worker():

# event is a key press
if data[0] == EV_KEY:
# Keep track of modifiers for use by "power off" shortcut
if event_code in MODIFIERS:
modifier_states[MODIFIERS[event_code]] = bool(data[4])

# Like the Mac OS "fast shutdown" shortcut, but using
# Scroll Lock/F14 instead of the power button since it's
# probably the most unused key in existence.
#
# NOTE: Do NOT change to `elif`. The previous `if` should not
# prevent keycodes from being passed through.
if (modifier_states[MOD_CTRL]
and modifier_states[MOD_SUPER]
and modifier_states[MOD_ALT]
and event_code == evdev.ecodes.KEY_SCROLLLOCK):
print("Keyboard-triggered shutdown initiated...")
usb4vc_ui.my_menu.goto_level(5)
usb4vc_ui.my_menu.action(5, 0)

# keyboard keys
if 0x1 <= event_code <= 248 and event_code not in gamepad_buttons_as_kb_codes:
elif 0x1 <= event_code <= 248 and event_code not in gamepad_buttons_as_kb_codes:
xfer_when_not_busy(make_keyboard_spi_packet(data, this_id))
# Mouse buttons
elif 0x110 <= event_code <= 0x117:
Expand Down