METHOD AND APPARATUS FOR DETERMINING CHARACTERISTICS OF AN INPUT SIGNAL

摘要

Aspects are directed to systems and methods of determining a value of a characteristic related to timing between sequential events of an input electronic signal using an input capture counter having a maximum counting value, the input electronic signal having an expected variable period between events whose value is between a maximum period value and a minimum period value with a delta period value equal to a difference between the maximum period value and the minimum period value.

主权项

1. A method of determining a value of a characteristic related to timing between sequential events of an input electronic signal using an input capture counter having a maximum counting value, the input electronic signal having an expected variable period between events whose value is between a maximum period value and a minimum period value with a delta period value equal to a difference between the maximum period value and the minimum period value, the method comprising:
receiving the electronic signal; setting a counter rate of the input capture counter to a value equal to the maximum counting value divided by the delta period value; detecting a first capture event; determining a value of the input capture counter at the first capture event; detecting a second capture event; determining a value of the input capture counter at the second capture event; and determining the value of the characteristic related to timing based on the value of the input counter at the first capture event and the value of the input counter at the second capture event.