I need an interrupt every 100 ms, but very much as a background operation. On each, the program must check an array of stored values. When one matches the number of 100 ms intervals that have occurred, additional functions must happen.
Example: Stored in the array are the values 123 and 456. Each is a value in tenths of a second (12.3 and 45.6 seconds, respectively). The clock begins running from 0 when an input is recognized. When the clock hits 123, a small set of instructions will execute. When it hits 456, another small set of instructions will execute. When the last (highest) value has been matched, the clock resets to 0 and waits until the next input to begin the process again.
The values may change, and there will be more than two, of course, but I need to look at the array every 100 ms.
Is that clearer?
I've done this with the 8051 family but I'm very new to PIC architecture and don't know my way around it yet. I'm working my way through a couple of books on it right now. I also have the data sheet and, after I pick up a couple of extra reams of paper, I'm going to print the family reference manual.
Russ
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