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# Note: superuser permission is required to run usbhid-dump
# successfully.
# HEX keys are according to the USB HID spec and USB HID usage table
# We can add more keys as needed in the future.
# This test may not be very accurate, as we only look for the first
# two lines of a descriptor section. Example:
#
# 001:003:000:DESCRIPTOR 1460501386.337809
# 05 01 09 02 A1 01 09 01 A1 00 05 09 19 01 29 03
# 15 00 25 01 95 03 75 01 81 02 .. .. .. .. .. ..
# .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
#
# By doing so we eliminate false matches when HEX keys are in the lines
# in the middle of the whole descriptor section.
if type usbhid-dump &>/dev/null; then
if USBHID_DUMP_OUTPUT=$(usbhid-dump -e descriptor 2>/dev/null|grep -A1 DESCRIPTOR); then
# checker for generic USB HID keyboard
USBHID_KBD_CMD="grep -E '^ 05 01 09 06'"
# checker for touch screen
USBHID_TS_CMD="grep -E '^ 05 0D 09 04'"
if echo "$USBHID_DUMP_OUTPUT"|eval $USBHID_TS_CMD &>/dev/null; then
HAVE_TOUCHSCREEN=1
fi
if echo "$USBHID_DUMP_OUTPUT"|eval $USBHID_KBD_CMD &>/dev/null; then
HAVE_KEYBOARD=1
else
# config script in OE will set HAVE_KEYBOARD=1
# if we don't set any value. We have to explicitly
# tell it when keyboard is not detected.
HAVE_KEYBOARD=0
fi
fi
fi
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