The touch_qm_channel_update_burstlen API can be used for Disabling and Re-enabling of QMatrix Sensors. In order to Disable a sensor, the QMatrix burst length value of all the Touch Channels corresponding to the Sensor must be set to 1. For Example, when a Wheel or Slider is composed of 4 Touch Channels, the touch_qm_channel_update_burstlen API should be used to set the burst length of all the 4 Touch Channels to 1. For the case of a Button, touch_qm_channel_update_burstlen API should be used to set burst length of the corresponding single Touch Channel of the Button to 1. Similarly, when re-enabling a Sensor, appropriate burst length must be set to all the Touch channels corresponding to the Sensor.
When a QMatrix Sensor is Disabled or re-enabled, it is mandatory to force Calibration on all Sensors. The Calibration of all Sensors is done using the touch_qm_sensors_calibrate API.
When disabling a Wheel or Slider, care must be taken to set the burst length of all the Touch channels corresponding to the Wheel or Slider to 1. If any of the Touch channels are missed out, it may result in undesired behavior of the Wheel or Slider. Similarly when re-enabling a Wheel or Slider, burst length of all the Touch channels corresponding to the Wheel or Slider must be set to an appropriate value. If any of the Touch Channels are left disabled with a burst length value 1, it may result in undesired behavior of Wheel or Slider.