I have a requirement to perform a daily calibration of an instrument on a daily basis. The time of calibration must be user configurable. So, what I have done is created a menu item which allows the operator to control the user time. Additionally, I have a file where I store the last calibration time. So, in my routine, I perform the calibration if it has been more than 1 day since the last calibration or the current time is greater than the daily set calibration time. For the latter condition, there is always a possibility that calibration could get performed before the 24 interval is up ie: initially, the daily calibration time was 9pm and then the operator decided to change it to 8am the following morning, so calibration would get run after 11 hours.
However, if I implement the OR condition as follows :
Current Time > Calibration Set Time || Current Time is 1 day older than last calibration time, I run into the problem that the calibration will be executed every time the current time > calibration set time, whereas I only want the calibration to be run once if the time has been changed. I am struggling with the logic of how to implement it. I am looking to the experts or the forum to help me overcome the intellectual roadblock right now.
