1.5.3 Status and Output Data

Table 1-10. 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 drift hold release after a touch event
`tch_drift_count_in`	1 byte	0-to-‘`sensor_touch_drift_rate`’	Countdown to 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. So, 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’.