Microcontrollers - AVR Atmega32 - Button Debouncing through Software

Official Page with More Information:
http://newbiehack.com/ButtonorSwitchDebounceinSoftware.aspx

This is the tenth video in a series on programming and simple circuit design for the Avr ATMega32 microcontroller. In this video, I demonstrate one technique to debounce a button's signal through programming rather than hardware.

Category:

Science & Technology

Tags:

• software
• debouncing
• button
• bounce
• microcontrollers
• microcontroller
• resistor
• LED
• breadboard
• atmega32
• atmega
• avr
• atmel
• vcc
• gnd
• ground
• 5v

[pcangeldust]

What is better software or hardware button debouncing?

[nedladdy]

Thank you for these. In debouncing would it be better to reset the confidence level on each counter-event. m not clear sorry.

eg. looking for a press

loop: if down then ++ conf else conf=0 if conf > 500 then pressed = true

goto loop

this we count the down time since the last up time.

cheers

[dsnyder05]

Amazing tutorials! Truly some of the most complete and concise explanations on any topic that I have looked up. Especially on something with so much depth as embedded programming! This really feels like a high school/early college level class/lecture. Please keep up the great work! Are there any plans on going into some basic circuit design- like sizing diodes, or capacitors, or what they do? What about data logging? Like storing data from the accelerometer to an SD card?

Thanks again, Keep itup

[Zanhor]

@anajonesr , Yes you did, but only when it's value > 200, I think you should reset both after every successful count, nether pressed or released .

Thank you, I learned a lot from your tuts

[anajonesr]

@Zanhor Thanks. I actually do zero the two variables you mention at the 7:00 minute mark.