RE: [avr-gcc-list] multi-tasking source for education?

[Gordo R.]

> From an educational point of view, designing a FSM application is probably 
the better choice since it'll force the students to think about the timing 
and sequencing of various tasks. Plus they'll learn from all their mistakes.

But if you just want to write and run multi-tasking applications, Larry's 
AvrX is a fine choice. It does assume you're familiar with the use of 
semaphores, timers, etc., but it also makes the application code a lot 
simpler and lets you get up and running faster.


> From: "Larry Barello" <<a 
> href="mailto:address@hidden";>address@hidden</a>>
> To: "AVR GCC List" <<a 
> href="mailto:address@hidden";>address@hidden</a>>
> Subject: RE: [avr-gcc-list] multi-tasking source for education?
> Date: Wed, 28 Apr 2004 08:19:48 -0700
>
> I think your requirements are at odds with each other.  Multi-tasking is
> complex by nature.  You can demonstrate cooperative multi-tasking by
> teaching FSM (finite state machines) and having a main loop that calls
> various FSM tasks based upon flags (semaphores) or queue entries.
>
> I have a "free" RTOS, but not very user friendly, although it comes with a
> bunch of samples and test programs showing how to use it.
> www.barello.net/avrx - but get the latest binaries from
> www.yahoogroups.com/group/avrx
>
> You can also check out www.avrfreaks.net for other pseudo and real
> multi-tasking kernels.  I consider the FSM technique pseudo since the tasks
> are not pre-emptable.  That said, pseudo works great for most applications
> and is my method of choice for small projects (<5k lines, 4-5 independent
> tasks).  I use avrx for stuff that need guaranteed execution time (e.g.
> sampling inputs for DSP) or large tasks that wait for user input (e.g. UI)
> while doing lots of stuff in the background.
>
> Cheers!
>
> -----Original Message-----
> From: <a 
> href="mailto:address@hidden";>address@hidden</a>
> [<a 
> href="mailto:address@hidden";>mailto:address@hidden</a>]On 
> Behalf Of Jacob Verschoor
> Sent: Wednesday, April 28, 2004 7:32 AM
> To: <a href="mailto:address@hidden";>address@hidden</a>
> Subject: Re: [avr-gcc-list] multi-tasking source for education?
>
>
> I mean a multi-tasking kernel for the ATMega8.
> I mean by user friendly interface software that can be simple used and
> integrated without a long learn proces.
> Excuse me for my bad english, and I'am not exactly know what I ask. A
> colleague ask it to me, and I ask it to the list.
>
> Thanks

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