Storing baseline information in EEPROM

A method for establishing no-event baseline sensor output values for sensors in a multi-event sensor panel without corruption by touch or hover events on or about the sensor panel, comprising:

• during boot-up of a sensor panel subsystem,
• performing a scan of the sensor panel to obtain new sensor output values,
• computing offsets for use in generating normalized baseline sensor output values,
• generating the normalized baseline sensor output values,
• computing a first number of new sensor output values above the normalized baseline sensor output values, and
• computing a second number of new sensor output values below the normalized baseline sensor output values;
• making a first determination as to whether any negative sensor output value is less than the baseline sensor output value for that sensor by a first amount;
• and
• recapturing new baseline sensor output values if it is determined that a negative sensor output value exists that is less than the baseline sensor output value for that sensor by the first amount.

An apparatus for establishing no-event baseline sensor output values for sensors in a multi-event sensor panel without corruption by touch or hover events on or about the sensor panel, comprising:

• a panel processor programmed for, during boot-up of a sensor panel subsystem,
• performing a scan of the sensor panel to obtain new sensor output values,
• computing offsets for use in generating normalized baseline sensor output values,
• generating the normalized baseline sensor output values,
• computing a first number of new sensor output values above the normalized baseline sensor output values,
• computing a second number of new sensor output values below the normalized baseline sensor output values,
• determining whether the second number is greater than the first number by a predetermined margin,
• re-scanning the sensor panel if it is determined that the second number is not greater than the first number by the predetermined margin, and
• recapturing the normalized baseline sensor output values if it is determined that the second number is greater than the first number by the predetermined margin.

A non-transitory computer-readable medium comprising program code for establishing no-event baseline sensor output values for sensors in a multi-event sensor panel without corruption by touch or hover events on or about the sensor panel, the program code for causing performance of a method comprising:

• during boot-up of a sensor panel subsystem,
• performing a scan of the sensor panel to obtain new sensor output values,
• computing offsets for use in generating normalized baseline sensor output values,
• generating the normalized baseline sensor output values,
• computing a first number of new sensor output values above the normalized baseline sensor output values,
• computing a second number of new sensor output values below the normalized baseline sensor output values,
• determining whether the second number is greater than the first number by a predetermined margin,
• re-scanning the sensor panel if it is determined that the second number is not greater than the first number by the predetermined margin, and
• recapturing the normalized baseline sensor output values if it is determined that the second number is greater than the first number by the predetermined margin.

A non-transitory computer-readable medium comprising program code for establishing no-event baseline sensor output values for sensors in a multi-event sensor panel without corruption by touch or hover events on or about the sensor panel, the program code for causing performance of a method comprising:

• during boot-up of a sensor panel subsystem,
• performing a scan of the sensor panel to obtain new sensor output values,
• computing offsets for use in generating normalized baseline sensor output values,
• generating the normalized baseline sensor output values,
• computing a first number of new sensor output values above the normalized baseline sensor output values, and
• computing a second number of new sensor output values below the normalized baseline sensor output values;
• making a first determination as to whether any negative sensor output value is less than the baseline sensor output value for that sensor by a first amount;
• and
• recapturing new baseline sensor output values if it is determined that a negative sensor output value exists that is less than the baseline sensor output value for that sensor by the first amount.