Re: C++ Toggle Button
Quote:
Originally Posted by thelegend
(Post 1313477)
I am trying to make a toggle for switching between Arcade Drive and Tank drive. I wrote and tested this code but the only result I get is a switch between Tank to Arcade, not the other way back. I have such a complicated system because I believe that if I simply set a variable to be True or False, it won't compensate for if the driver holds on to the button. That's why I have a clause in there that checks if the button has been released.
If you find any issues, please reply!
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Note to future EEs - and not pertaining to our FRC/FTC control systems - mechanical switches "bounce" when they close, there are multiple on/off events before the switch consistently stays closed. This may not matter if you're just turning something on, but it will confuse any "toggle" algorithms, registering multiple toggles. Mechanical switches have to be "debounced", which can be done with an r-s latch in hardware, or by designing in an time interval after the first make, in which other transitions are ignored. Our joystick buttons are debounced in this manner because they provide a clean off => on transition. I haven't tried it, but I think if one designed a toggle algorithm for, say, a microswitch (like we use for limit switches) connected to a digital input of the Digital Sidecar, one would see multiple toggles for one switch "make."
Apologies, I don't remember if there are contact bounces when a mechanical switch disconnects. When I can get to our control system I'll test this out and post an update.
Remember, again, we don't need to worry about this for our joystick buttons, they've been debounced for us. |
