AVR-Chat

I would do the RS-232 handling via interrupts. That way your program can go
it merry way.
1) When communication data is received the normal process will be
interrupted
2) The interrupt will receive the data.
3) The data will then be ready to be placed into a variable that your code
can handle.

The first tutorial covers use of the USART.
The second tutorial explains interrupts,
The third tutorial is about interrupts and the USART

Via Dean Camera at www.avrfreaks.net

A tutorial on Using the USART with AVR-GCC
ttp://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=45341
I would think that replacing the 'while' with an 'if' there would check to
see if something has been received then doing getting that data would not
tie up the process just waiting for data.

A tutorial titled Newbie's Guide to AVR Interrupts
http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=89843&highlight=interrupts

A tutorial on Interrupt driven USARTs
http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=48188&highlight=interrupts

If you are not a member of www.avrfreaks.net it would help you to join up.
It free.

Also, www.smileymicros.com has valuable info and books on AVR micros. Smiley
is almost a daily contributor on AVRFreaks.

For a lot of operations with AVRs I feel interrupts are the way to go
because they free up the micro to do the mundane chores and only interrupt
that as needed.

Mike

Linux since March 2004
www.counter.li.org
Registered Linux User: #482134
Taking up Linux Ubuntu and give-up the Windos habit.
Hasta la Vista, Baby. I won't be back!
Mike Bronosky
Mike@Bronosky.com


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