Gather fresh, edible flowers. Be sure you know what you're foraging - some wild blooms are NOT edible. You may also use sugared violets or other sugared flowers in your violet popcorn.
If using fresh flowers, gently shake off any dust or debris. If you must rinse them, place them in a salad spinner to get them as dry as possible. Place them on a towel or dehydrator rack to dry completely. You may also place your blooms in the refrigerator for a bit, if you can't use them right away. Work quickly, though - blooms like violets will begin to curl up and fade rather quickly.
Gently toss in fresh edible flowers or sugared violets.
To learn to pop popcorn on your stove top, please read this article from Amy's Healthy Baking. All you need is a pan and a stove top.