input/devices/elantech.rst

26         5.2.2 One/Three finger touch
27         5.2.3 Two finger touch
31         6.2.1 One/Three finger touch
32         6.2.2 Two finger touch
207          single finger width?
282                firmware 1.x seem to map one, two and three finger taps
285             w = 1 when wide finger touch?
301 when 1 finger is touching, the first 2 position reports must be discarded.
331             tw = 1 when two finger touch
332             th = 1 when three finger touch
333             f  = 1 when finger touch
409 …         (((SA1 & 0x0C) != 0x0C) && ((SA1 & 0xC0) == 0x80)) || // check Byte 1 (one finger pressed)
412 …         (((SB1 & 0x0E) != 0x08) && ((SA1 & 0xC0) == 0x80)) || // check Byte 4 (one finger pressed)
425 One/Three finger touch
454 	 vf = a kind of flag ? (only on EF123, 0 when finger is over one
456 	 w3..w0 = width of the finger touch (not EF113)
482 Two finger touch
503 	 ax8..ax0 = lower-left finger absolute x value
510 	 ay8..ay0 = lower-left finger absolute y value
522          bx8..bx0 = upper-right finger absolute x value
529          by8..by0 = upper-right finger absolute y value
543          T: 1 = enable two finger mode auto correct
550 1 and 3 finger touch shares the same 6-byte packet format, except that
551 3 finger touch only reports the position of the center of all three fingers.
553 Firmware would send 12 bytes of data for 2 finger touch.
557 when number of finger changes, F/W would send "debounce packet" to inform
570 One/Three finger touch
598          w3..w0 = width of the finger touch
614 Two finger touch
617 The packet format is exactly the same for two finger touch, except the hardware
618 sends two 6 byte packets. The first packet contains data for the first finger,
619 the second packet has data for the second finger. So for two finger touch a
644 head packets or motion packets. A head packet contains data of finger id, finger
649 can expect two following head packets. If the finger status doesn't change,
650 the following packets would be motion packets, only sending delta of finger
653 One exception is one finger touch. when a status packet tells us there is only
654 one finger, the hardware would just send head packets afterwards.
671          ft4 ft3 ft2 ft1 ft0 ftn = 1 when finger n is on touchpad
704         w3..w0 = finger width (spans how many trace lines)
723        id2..id0 = finger id
748        id2..id0 = finger id
771        id2..id0 = finger id
787         byte 0 ~ 2 for one finger