Retrieve Last Touch Screen Event

\i T ?

Returns the most recent touch event, which is always stored by the controller (even if no key is assigned to the touch field).

Coordinates can become negative and the minimum/maximum coordinate values which are reported can even fall outside the physical screen dimensions by one pixel when converted to absolute coordinates.
It is recommended to wait for the report before sending additional commands, since touch events use a different buffer and could otherwise be delayed by the responses to following commands.
When more than one touch point are evaluated simultaneously (refer to Set Number of Touch Fingers), a point_id is inserted to the report (refer to Touch Field Press/Release & Coordinate of Event).

Response:

[ACK] event (point_id) field_idx ev_coord_x ev_coord_y [ACK]

Parameter	Type	Range	Description
event	event	K, k, M	event type (refer to table below)
point_id	byte	0 ... 4	(optional) ID of the touch point (finger)
field_idx	byte	0 ... 63	index of the touch field
ev_coord_x	word	0 ... display width	horizontal position of the event
ev_coord_y	word	0 ... display height	vertical position of the event

Event	Description
K	touch has been pressed (make)
k	touch has been released (break)
M	location of the press has been moved
NULL	no event has occurred

Response Example

[ACK]K[01][00][7D][00][96][ACK]

The last touch event was a make event (touch field was pressed) reported from the touch field with index 1 at coordinates x = 125 pixels and y = 150 pixels. Here, the point_id is missing since only one touch point is evaluated.