3.1.5.3 Status and Output Data

Table 3-8. Group Data
Parameter	Size	Range/Options	Usage
`qtm_keys_status`	1 byte	Bit 7: Reburst required Bit 6-1: Reserved Bit 0: Touch Detection	Indicates the current state of the Touch Key Group
`acq_group_timestamp`	2 bytes	0-to-65535	Timestamp of last drift period processed
`dht_count_in`	1 byte	0-to-‘`sensor_drift_hold_time`’	Countdown to the drift hold release after a touch event
`tch_drift_count_in`	1 byte	0-to-‘`sensor_touch_drift_rate`’	Countdown to the next towards a touch drift period
`antitch_drift_count_in`	1 byte	0-to-‘`sensor_anti_touch_drift_rate`’	Countdown to the next away from a touch drift period

Individual Key Sensor Data

The individual key sensor data is required by other post processing modules like Scroller. This data structure definition is placed on the common_compoenents_api.h file.


Parameter	Size	Range/Options	Usage
`sensor_state`	1 byte	Bit field	Touch key sensor state
`sensor_state_counter`	1 byte	0-to-255	The number of repeat measurements to confirm a touch detection and an out-of-touch detection
`*node_data_struct_ptr`	2/4 bytes	Pointer	Pointer to node data structure array
`Channel_reference`	2 bytes	0-to-65535	Reference measurement, baseline for touch detection


`sensor_state`	Value
`QTM_KEY_STATE_DISABLE`	0x00
`QTM_KEY_STATE_INIT`	0x01
`QTM_KEY_STATE_CAL`	0x02
`QTM_KEY_STATE_NO_DET`	0x03
`QTM_KEY_STATE_FILT_IN`	0x04
`QTM_KEY_STATE_DETECT`	0x85
`QTM_KEY_STATE_FILT_OUT`	0x86
`QTM_KEY_STATE_ANTI_TCH`	0x07
`QTM_KEY_STATE_SUSPEND`	0x08
`QTM_KEY_STATE_CAL_ERR`	0x09
Note: Bit 7 (0x80u) is set in each state where the touch key sensor is ‘In Detect’.