On Wed, October 5, 2016 2:35 am, Benjamin Tissoires wrote:
> On Oct 04 2016 or thereabouts, Roderick Colenbrander wrote:
>> + /*
>> + * The first 7 bits of the first byte is a counter and bit 8 is
>> + * a touch indicator that is 0 when pressed and 1 when not
>> + * pressed.
>> + * The next 3 bytes are two 12 bit touch coordinates, X and Y.
>> + * The data for the second touch is in the same format and
>> + * immediately follows the data for the first.
>> + */
>> + for (n = 0; n < 2; n++) {
>> + u16 x, y;
>> + bool active;
>> +
>> + x = rd[offset+1] | ((rd[offset+2] & 0xF) << 8);
>> + y = ((rd[offset+2] & 0xF0) >> 4) | (rd[offset+3] << 4);
>> +
>> + active = !(rd[offset] >> 7);
>> + input_mt_slot(input_dev, n);
>>
>
> Just to be sure, the device reports 2 touches only, and the
> "num_touch_data" chunks are just the history of these 2 touches, the
> last chunk being the last known touches?
FYI - Community knowledge/understanding...
http://www.psdevwiki.com/ps4/DS4-BT#HID_INPUT_reports
Simon
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