Butterfly Joystick

Log in or register to post comments
Go To Last Post
3 posts / 0 new
Author
Message
jbelk7
jbelk7's picture
Level: New Member
Joined: Sun. Mar 27, 2011
Posts: 8 View posts
#1
Posted by jbelk7: Sun. Apr 3, 2011 - 11:38 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I'm working on a project using the AVR Butterfly board. I want to push buttons on the joystick and turn on outputs while displaying data on the LCD.

I just need a driver I can understand.

Smiley Micros provides a bunch of code in Chapter 7, and I can't figure out what I need from it or how to use it.

Also, Atmel has button.c, but it calls up a dozen other source files.

Anyone have any advice or a simpler driver? Thanks.

Tags:

AVR Microcontrollers, megaAVR and tinyAVR
Top
Koshchi
Koshchi's picture
Level: 10k+ Postman
Joined: Wed. Nov 17, 2004
Posts: 15658 View posts
Location: Vancouver, BC
Posted by Koshchi: Mon. Apr 4, 2011 - 12:00 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

The most common method is just to poll the value of the pins at a regular interval. If the value of pin remains the same for, say, 8 of those intervals, then consider the pin to be at that value. You just need to have the size of the interval that matches the characteristics of the switch. Something in the range of 1-10ms should be good.

Regards,
Steve A.

The Board helps those that help themselves.

Top
smileymicros
smileymicros's picture
Level: Raving Lunatic
Joined: Wed. Nov 17, 2004
Posts: 6275 View posts
Location: Great Smokey Mountains.
Posted by smileymicros: Mon. Apr 4, 2011 - 12:06 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Maybe these will help.

Smiley

Attachment(s): 

PDF icon Workshop 8 - Interrupts, Registers, and the Butterfly Joystick.pdf
Package icon ButterflyJoystick.zip
Top