Multi-frequency character transmission and detection
A touch sensor device (TSD) includes a panel that includes electrodes and drive-sense circuits (DSCs). Different electrodes may be implemented in different directions. A first DSC is operably coupled via a first single line to a first electrode, and a second DSC is operably coupled via a second single line to the panel. The DSCs operate by providing respective signals via the respective single lines and simultaneously sensing the signals. For example, sensing of a first signal of a first DSC includes detection of a first electrical characteristic of the first electrode and/or a first change of the first signal. Sensing of a second signal of the second DSC includes detection of coupling of another signal into the panel in accordance with digital data communication from another device to the TSD. The DSCs also generate respective digital signals based upon what they sense.
1. A touch sensor device (TSD) comprising:
a panel that includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction;
a first drive-sense circuit (DSC) operably coupled via a first single line to a first electrode of the first plurality of electrodes, the first DSC configured to:
generate a first signal based on a first reference signal;
provide the first signal via the first single line to the first electrode of the first plurality of electrodes and simultaneously to sense the first signal via the first single line, wherein sensing of the first signal includes detection of at least one of a first electrical characteristic of the first electrode or a first change of the first signal; and
generate a first digital signal representative of the at least one of the first electrical characteristic of the first electrode of the first plurality of electrodes or the first change of the first signal; and
a second DSC operably coupled via a second single line to a channel of the panel that is not implemented for touch sensing functionality, the second DSC configured to:
generate a second signal based on a second reference signal;
provide the second signal via the second single line to the channel of the panel that is not implemented for touch sensing functionality and simultaneously to sense the second signal via the second single line, wherein sensing of the second signal includes detection of coupling of another signal into the channel of the panel that is not implemented for touch sensing functionality in accordance with digital data communication from another device to the TSD; and
generate a second digital signal representative of the coupling of the another signal into the channel of the panel that is not implemented for touch sensing functionality in accordance with digital data communication from the another device to the TSD.
2. The TSD of claim 1 further comprising:
memory that stores operational instructions; and
one or more processing modules operably coupled to the first DSC, the second DSC, and the memory, wherein, when enabled, the one or more processing modules configured to execute the operational instructions to process the second digital signal to interpret the digital data communication from the another device to the TSD.
3. The TSD of claim 1 , wherein the sensing of the second signal also includes detection of at least one of a second electrical characteristic of the panel or a second change of the second signal.
4. The TSD of claim 1 , wherein the another signal is a first other signal; and further comprising:
a third DSC operably coupled via a third single line to the panel, the third DSC configured to:
generate a third signal based on a third reference signal;
provide the third signal via the third single line to the panel and simultaneously to sense the third signal via the third single line, wherein sensing of the third signal includes detection of coupling of a second other signal into the panel in accordance with the digital data communication from the another device to the TSD; and
generate a third digital signal representative of the coupling of the second other signal into the panel in accordance with the digital data communication from the another device to the TSD.
5. The TSD of claim 4 , wherein:
the first other signal facilitates communication of a first bit of the digital data communication from the another device to the TSD; and
the second other signal facilitates communication of a second bit of the digital data communication from the another device to the TSD.
6. The TSD of claim 4 , wherein:
the first other signal facilitates communication of a bit of the digital data communication from the another device to the TSD; and
the second other signal facilitates complementary communication of the bit of the digital data communication from the another device to the TSD.
7. The TSD of claim 1 , wherein the another signal that is coupled into the panel is a sum tones resultant that is based on summation of a plurality of sinusoidal signals.
8. The TSD of claim 1 , wherein the another signal that is coupled into the panel is a sum tones resultant that is amplitude scaled and based on summation of a plurality of sinusoidal signals.
9. The TSD of claim 1 , wherein the another signal that is coupled into the panel corresponds to bit within a multi-bit value of the digital data communication from the another device to the TSD.
10. The TSD of claim 1 , wherein:
the another signal is a first other signal that is coupled into the panel at or during a first time; and
a second other signal is coupled into the panel at or during a second time.
11. The TSD of claim 1 , wherein:
the first DSC is configured to facilitate at least one of touch or hover detection within the TSD; and
the second DSC is configured to facilitate the digital data communication from the another device to the TSD.
12. The TSD of claim 1 , wherein the first DSC further comprises:
a power source circuit operably coupled to the first electrode via the first single line, wherein, when enabled, the power source circuit is configured to provide the first signal that includes an analog signal via the first single line, and wherein the analog signal includes at least one of a DC (direct current) component or an oscillating component; and
a power source change detection circuit operably coupled to the power source circuit, wherein, when enabled, the power source change detection circuit is configured to:
detect an effect on the analog signal that is based on the at least one of the first electrical characteristic of the first electrode of the first plurality of electrodes or a first change of the first signal; and
generate the first digital signal representative of the at least one of the first electrical characteristic of the first electrode of the first plurality of electrodes or the first change of the first signal.
13. The TSD of claim 12 further comprising:
the power source circuit including a power source to source at least one of a voltage or a current to the first electrode via the first single line; and
the power source change detection circuit including:
a power source reference circuit configured to provide at least one of a voltage reference or a current reference; and
a comparator configured to compare the at least one of the voltage or the current provided to the first electrode via the first single line to the at least one of the voltage reference or the current reference in accordance with producing the analog signal.
14. A touch sensor device (TSD) comprising:
a panel that includes a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction;
a first drive-sense circuit (DSC) operably coupled via a first single line to a first electrode of the first plurality of electrodes, the first DSC configured to:
generate a first signal based on a first reference signal;
provide the first signal via the first single line to the first electrode of the first plurality of electrodes and simultaneously to sense the first signal via the first single line, wherein sensing of the first signal includes detection of at least one of a first electrical characteristic of the first electrode or a first change of the first signal; and
generate a first digital signal representative of the at least one of the first electrical characteristic of the first electrode of the first plurality of electrodes or the first change of the first signal;
a second DSC operably coupled via a second single line to a channel of the panel that is not implemented for touch sensing functionality, the second DSC configured to:
generate a second signal based on a second reference signal;
provide the second signal via the second single line to the channel of the panel that is not implemented for touch sensing functionality and simultaneously to sense the second signal via the second single line, wherein sensing of the second signal includes detection of coupling of a first other signal into the channel of the panel that is not implemented for touch sensing functionality in accordance with digital data communication from another device to the TSD; and
generate a second digital signal representative of the coupling of the first other signal into the channel of the panel that is not implemented for touch sensing functionality in accordance with digital data communication from the another device to the TSD;
a third DSC operably coupled via a third single line to the panel, the third DSC configured to:
generate a third signal based on a third reference signal;
provide the third signal via the third single line to the panel and simultaneously to sense the third signal via the third single line, wherein sensing of the third signal includes detection of coupling of a second other signal into the panel in accordance with the digital data communication from the another device to the TSD; and
generate a third digital signal representative of the coupling of the second other signal into the panel in accordance with the digital data communication from the another device to the TSD;
memory that stores operational instructions; and
one or more processing modules operably coupled to the first DSC, the second DSC, and the memory, wherein, when enabled, the one or more processing modules configured to execute the operational instructions to process the second digital signal and the third digital signal to interpret the digital data communication from the another device to the TSD.
15. The TSD of claim 14 , wherein:
the first other signal facilitates communication of a first bit of the digital data communication from the another device to the TSD; and
the second other signal facilitates communication of a second bit of the digital data communication from the another device to the TSD.
16. The TSD of claim 14 , wherein:
the first other signal facilitates communication of a bit of the digital data communication from the another device to the TSD; and
the second other signal facilitates complementary communication of the bit of the digital data communication from the another device to the TSD.
17. The TSD of claim 14 , wherein the first other signal or the second other signal that is coupled into the panel is a sum tones resultant that is based on summation of a plurality of sinusoidal signals.
18. The TSD of claim 14 , wherein the first other signal or the second other signal that is coupled into the panel is a sum tones resultant that is amplitude scaled and based on summation of a plurality of sinusoidal signals.
19. The TSD of claim 14 , wherein the first DSC further comprises:
a power source circuit operably coupled to the first electrode via the first single line, wherein, when enabled, the power source circuit is configured to provide the first signal that includes an analog signal via the first single line, and wherein the analog signal includes at least one of a DC (direct current) component or an oscillating component; and
a power source change detection circuit operably coupled to the power source circuit, wherein, when enabled, the power source change detection circuit is configured to:
detect an effect on the analog signal that is based on the at least one of the first electrical characteristic of the first electrode of the first plurality of electrodes or a first change of the first signal; and
generate the first digital signal representative of the at least one of the first electrical characteristic of the first electrode of the first plurality of electrodes or the first change of the first signal.
20. The TSD of claim 19 further comprising:
the power source circuit including a power source to source at least one of a voltage or a current to the first electrode via the first single line; and
the power source change detection circuit including:
a power source reference circuit configured to provide at least one of a voltage reference or a current reference; and
a comparator configured to compare the at least one of the voltage or the current provided to the first electrode via the first single line to the at least one of the voltage reference or the current reference in accordance with producing the analog signal.