User Input Parsing Subsystem

[ZacharyDownum]

Objectives

• Create a project that will accurately measure the duty cycle of an input signal, assumed to be a square wave (PWM) input of an unknown frequency.
• Simplify the code such that the only outward-facing functions abstract away the complexity (including register use, calculations, etc.) and allows the user to obtain the latest duty cycle measurement without being concerned with the underlying implementation or processes.

Steps to Complete

• Reuse most of the code from the Input Capture Example
• In addition to the functionality the Input Capture Example provides, do the following:
  • use the timing information provided by the Input Capture Example to produce an accurate approximation of the duty cycle of the signal by doing the following:
    • Take the time between the rising and falling edge. This is the approximate time the signal input was high.
    • Take the time between the first and the second rising edge. This is the approximate time of one signal period.
    • Divide the signal's logic high time by its total period time. This decimal is an approximation of the duty cycle of the signal.
• After this is completed, go through and create a struct representing a single IC module that functions in this manner
  • The only outward-facing variables and functions are those that provide information pertinent to the objectives of the project.
  • The struct should contain neatly-named function pointers directed at internal, specific functions (that may not be so nicely named).
• The struct should contain a variable that is continually updated (with no prompting from the user) with the most recent duty cycle of the input signal
• The struct should have an initialize function that begins input signal data collection. This should be able to be called by the user
  • This initialization function should put the proper values in registers and create interrupts and the logic necessary to produce the estimated duty cycle (most of which will be within the interrupts).