Capacitive knob sensing system and method to detect initial states

A processing system for determining a rotational direction of a knob interface, comprising:

• one or more processors;
• and
• a non-transitory computer-readable medium having processor-executable instructions stored thereon, the processor-executable instructions, when executed by the one or more processors, facilitating performance of the following:
• obtaining, using a set of rotation electrodes that interact with the knob interface, first resulting signals and second resulting signals;
• determining an initial state of the knob interface using the first resulting signals and the second resulting signals;
• obtaining, using the set of rotation electrodes, third resulting signals indicating a first rotational state of the knob interface, based at least in part on the knob interface being rotated from the initial state to the first rotational state;
• determining the rotational direction of the knob interface using the first resulting signals, the second resulting signals, and the third resulting signals;
• and
• adjusting a setting using the determined rotational direction.

A non-transitory computer-readable medium having processor-executable instructions stored thereon, the processor-executable instructions, when executed, facilitating performance of the following:

• obtaining, using a set of rotation electrodes that interact with a knob interface, first resulting signals and second resulting signals;
• determining an initial state of the knob interface using the first resulting signals and the second resulting signals;
• obtaining, using the set of rotation electrodes, third resulting signals indicating a first rotational state of the knob interface, based at least in part on the knob interface being rotated from the initial state to the first rotational state;
• determining a rotational direction of the knob interface using the first resulting signals, the second resulting signals, and the third resulting signals;
• and
• adjusting a setting using the determined rotational direction.