¿Arduino store button push in buffer?

Using Arduino Programming Questions
#1

Hi.

I want to know if I can store a button push in a buffer to read afther loop code executio or I need to read the button push in the same moment that it pushing.

Example:

loop{
read button and is 0
turn led on
wait 1000
turn led off
}

If the user push the button while the code is in the "wait 1000" line. ¿What I will read in the next "read button" line 0 or 1? Its a problem if I have to read the button in the moment that the user in pressing it.

I have similar question with the RF communication using nrf24l01... ¿I have to read rf just while emissor is emiting or the module store the comunication in buffer?

Thanks and regards.

#2

If the user push the button while the code is in the "wait 1000" line. ¿What I will read in the next "read button" line 0 or 1?

You will read the value at the time you do your read.

There are two ways round this.

  1. Have the button generate an ISR ( Interrupt service routine ) and let that store a pushed value in a variable. Then read that variable in the loop.

  2. The proper method is not to use the wait ( actually delay ) in the first place and implement your code as a state machine.

See my
http://www.thebox.myzen.co.uk/Tutorial/State_Machine.html
Or Robin2's several things at once

#3