Thanks!  I love to hear about projects using AVRX...

-----Original Message-----
From: Wei-Min Shen [mailto:shen@...]
Sent: Tuesday, October 27, 2009 3:36 PM
To: Larryba@...
Subject: Big successes for AvrX!

Dear Larry,

I am the director of Polymorphic Robotics Lab in USC and we have been
using your AvrX for our self-reconfigurable robotic system called
SuperBot since 2005. I want to let you know that your software system
works beautifully for these robots and I personally as a computer
scientist admire your ability to wrote such a compact and functional
system.

SuperBot is a multi-million dollar project sponsored by NASA for space
robots. You can find more information about the project at
http://www.isi.edu/robots
. There are papers, movies, and news clips from BCC, Fox, Discovery,
New York Times, and others. More are coming every month.

Again, thank you very much for your work and it made a big difference
for our distributed control of these robots!

Sincerely yours,

Wei-Min

=================================================================
Wei-Min Shen,  Director of Polymorphic Robotics Lab
Associate Director, USC Center for Robotics and Embedded Systems
Research Associate Professor in Computer Science
Information Sciences Institute, University of Southern California
4676 Admiralty Way, Marina del Rey, CA 90292
Phone: 310-448-8710, Fax 310-822-0751, http://www.isi.edu/robots
==================================================================



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.423 / Virus Database: 270.14.26/2451 - Release Date: 10/27/09
07:38:00

Hi,

Hope you are good.

Wishing you a VERY VERY PROSPEROUS and GREAT TIME and LIFE Ahead on this DIWALI
:)


:-)

Stay Happy...
Keep Smiling...


- Pankaj Agrawal

AvrX release 2.6g is available in the group's files section:
http://finance.groups.yahoo.com/group/avrx/files/
You'll find the zip file in the "AvrX" folder.

1 ms could be done by an AvrX thread, but since you have so much other
stuff to do, I would recommend sampling the keys in a hardware timer
interrupt and perform other tasks in an AvrX soft timer.

That said, what kind of "sampling" needs to be done on the keys?
Analog, digital, encoder?

Your tick rate is up to you.  I usually adjust mine to make any math/
timing easier based on the application.  For example, if the MIDI
protocol has a fixed number of key samples per packet; you might want
some even multiple/fraction of that.

One more recommendation: don't go thread happy.  Threads are RAM
hogs.  I've always been better off defining one thread,
running a soft timer (for example with a 50 hz frequency), then in the
code I do modulos to call functions for the other slower tasks (maybe
at 10 and 1 hz).  Doing this avoids thread schedule collisions and has
a *lot* more predictable behavior.  Here's a code sample from my robot
software.  In it you'll see several functions happen at 5Hz and my LCD
UI code at 1 Hz:

/* The 5 Hz Task: sensors, KF, nav, behavior */
AVRX_GCC_TASKDEF(five_hz_task, 128, 4)
{
      TimerControlBlock delay_timer;
      uint8_t one_hz_counter;

      one_hz_counter = 1;

      for (;;)
      {
          AvrXStartTimer(&delay_timer,
                         FIVE_HZ_TASK_PERIOD_MS / AVRX_TIMESLICE_MS);

          sensors_sample();
          motc_periodic();
          kf_step();
          nav_calc_data();

          /* 1 Hz: update lcd with nav data */
          if (--one_hz_counter == 0)
          {
              one_hz_counter = ONE_HZ_MODULO;
              lcdui_update_nav();
          }

          AvrXWaitTimer(&delay_timer);
      }
}


!!Dean


On Sep 27, 2009, at 11:27 , albin.stigo wrote:

> Hi all,
>
> I'm new to avrx but not avr in general... I'm developing an open
> sourced (gpl) midi controller (keyboard). Previously this
> controller's software was running as a state machine but as i keep
> adding features like display and rotary encoders its getting too
> complex and I thought I might try running it on an RTOS, and have
> some basic questions :-)
>
> The keyboard module is velocity sensitive and therefore the keys
> "state" has to be sampled exactly every 1ms... Is this kind of
> timing / sample rate possible? I plan to be running about 4 or 5
> tasks (all of them less time critical). What tick rate should i
> choose? I'm using at atmega128 running at 12Mhz. What would the
> overhead be... how many extra instructions / tick and context switch
> (approximately)?
>
> Where can i find the latest source for avrx, I read somewhere the
> latest sources are posted on this lists but I can't really find any..?
>
> Thanks,
> Albin
>
>
>

Hi Albin,

> The keyboard module is velocity sensitive and therefore the keys
> "state" has to be sampled exactly every 1ms... Is this kind of
> timing / sample rate possible? I plan to be running about 4 or 5
> tasks (all of them less time critical). What tick rate should i
> choose? I'm using at atmega128 running at 12Mhz. What would the
> overhead be... how many extra instructions / tick and context
> switch (approximately)?

What I would do (have done) is to keep the keyboard scanning and
velocity timers inside an interrupt handler kicked by a timer running
at 1ms, but move everything else into the RTOS domain.  This keeps
your velocity measuring state machine ticking at a regular rate, so
no funny 'bum' notes.

In my case, a 61-note keyboard scanned at 1ms, with both down and
release velocity measurement, running on a 4MHz ATmega103L during
prototyping.  The target device will be an ATmega8 running at 8, 12
or 15MHz (not decided just yet), and while I don't have display or
rotary encoders I do have four analogue inputs to sample and filter.

Cheers,
Neil
--
http://www.njohnson.co.uk

Hi all,

I'm new to avrx but not avr in general... I'm developing an open sourced (gpl)
midi controller (keyboard). Previously this controller's software was running as
a state machine but as i keep adding features like display and rotary encoders
its getting too complex and I thought I might try running it on an RTOS, and
have some basic questions :-)

The keyboard module is velocity sensitive and therefore the keys "state" has to
be sampled exactly every 1ms... Is this kind of timing / sample rate possible? I
plan to be running about 4 or 5 tasks (all of them less time critical). What
tick rate should i choose? I'm using at atmega128 running at 12Mhz. What would
the overhead be... how many extra instructions / tick and context switch
(approximately)?

Where can i find the latest source for avrx, I read somewhere the latest sources
are posted on this lists but I can't really find any..?

Thanks,
Albin

 

Adeilton, does your project use AvrX in any way? I cannot find
mention of AvrX in your blog.

!!Dean

On Sep 19, 2009, at 21:07 , Adeilton Oliveira wrote:

> Hello,
>
> The blog has been updated with some new posts a videos, including the
> first application of Babuino Project, an obstacle avoidance vehicle.
> Here is the link:
>
> http://babuinoproject.blogspot.com/
>
> Please feel free to make your comments!
>
> Adeilton Oliveira
>
>
>
> Adeilton Oliveira wrote:
>> Hello guys,
>>
>> I'll share with you the weekend project I am developing with Arduino
>> board and AVR Studio.
>> This is a Robot dev. plataform. I can program the Arduino in LOGO
>> language using the Cricket Logo, Logo Blocks (it's not working 100%),
>> iCode, and CTI Blocos.
>> Here is the link:
>>
>> http://babuinoproject.blogspot.com/
>>
>> Regards.
>>
>
>
>
>
> ------------------------------------
>
> To unsubscribe send an email to:
> avrx-unsubscribe@yahoogroups.com
>
> Yahoo! Groups Links
>
>
>

Adeilton, does your project use AvrX in any way?  I cannot find
mention of AvrX in your blog.

!!Dean


On Sep 19, 2009, at 21:07 , Adeilton Oliveira wrote:

> Hello,
>
> The blog has been updated with some new posts a videos, including the
> first application of Babuino Project, an obstacle avoidance vehicle.
> Here is the link:
>
> http://babuinoproject.blogspot.com/
>
> Please feel free to make your comments!
>
> Adeilton Oliveira
>
>
>
> Adeilton Oliveira wrote:
>> Hello guys,
>>
>> I'll share with you the weekend project I am developing with Arduino
>> board and AVR Studio.
>> This is a Robot dev. plataform. I can program the Arduino in LOGO
>> language using the Cricket Logo, Logo Blocks (it's not working 100%),
>> iCode, and CTI Blocos.
>> Here is the link:
>>
>> http://babuinoproject.blogspot.com/
>>
>> Regards.
>>
>
>
>
>
> ------------------------------------
>
> To unsubscribe send an email to:
> avrx-unsubscribe@yahoogroups.com
>
> Yahoo! Groups Links
>
>
>

Hello,

The blog has been updated with some new posts a videos, including the
first application of Babuino Project, an obstacle avoidance vehicle.
Here is the link:

http://babuinoproject.blogspot.com/

Please feel free to make your comments!

Adeilton Oliveira



Adeilton Oliveira wrote:
> Hello guys,
>
> I'll share with you the weekend project I am developing with Arduino
> board and AVR Studio.
> This is a Robot dev. plataform. I can program the Arduino in LOGO
> language using the Cricket Logo, Logo Blocks (it's not working 100%),
> iCode, and CTI Blocos.
> Here is the link:
>
> http://babuinoproject.blogspot.com/
>
> Regards.
>

Ïîìîãèòå ðåøèòü ïðîáëåìó ñ çàïóñêîì îäíîãî èç ïðèìåðîâ äèñòðèáóòèâà AvrX2.6f.
Êîìïèëèðóþ ïðîåêò "Timers"? äàëåå çàïóñêàþ â äåáàãåðå (AvrStudio, Proteus), íî
íå ïîëó÷àþ îæèäàåìîãî ðåçóëüòàòà. Ïðîãðàììà îñòàíàâëèâàåòñÿ... Êàê òîëüêî ñòàâëþ
êîìåíòàðèé íà ñòðîêàæ ãäå åñòü AvrXdelay  ...WaitTimers... , ïåððåêîìïèëèðóþ,
ñðàçó âñå ñòàíîâèòüñÿ õîðîøî, ïðîãðàììà íà÷èíàåò ðàáîòàòü, íî åñòåñòâåííî íåò
âðåìåííûõ çàäåæåê ïî òàéìåðàì. Ìîæåò áûòü åñòü êàêèå òî îñîáåííîñòè ?

Thanks for your tips.  I am using ATmega644P and got the same problem.  However,
your fix seems to require _AVR_IOMX8_H_, which I do not have.  I use the
following method:

For avrx_generatesinglestepinterrupt.S:
The original code segment:
GenerateInterrupt:
#ifdef CS0
#    define CS00 CS0 /* Cover mega128 fubar with changed bit names */
#endif

Added this after that:
#ifdef TCCR0B
#    define TCCR0 TCCR0B /* Cover register change for atmega48/88/168  and
ATmega164P/324P/644P */
#endif


For avrx_eeprom.S:
#include        "avrx.inc"

#ifdef EEPE
# define EEWE EEPE /* Cover register change for atmega48/88/168 and
ATmega164P/324P/644P */
# define EEMWE EEMPE /* Write enable and master write enable */
#endif


This might work better...

- john


--- In avrx@yahoogroups.com, "j_s_connell" <j_s_connell@...> wrote:
>
> Fixed my problem, looks like register naming problem (maybe i have an
> older version of avrx).
>
> To fix added following to avrx_generatesinglestepinterrupt.S:
> after #include "avrx.inc" :
>
> #ifdef _AVR_IOMX8_H_
> #  define TCCR0 TCCR0B /* Cover register change for
> atmega48/88/168 */
> #endif
>
> also had to fix avrx_eeprom.S
> after #include "avrx.inc" :
> #ifdef _AVR_IOMX8_H_
> #  define EEWE EEPE 	 /* Cover register change for
> atmega48/88/168 */
> #  define EEMWE EEMPE     /* Write enable and master write
> enable */
> #endif
>
> Now all libraries compile fine!
>
> If this was obvious or i have incorrect avrx files, i apologize.
>
>
> --- In avrx@yahoogroups.com, "j_s_connell" <j_s_connell@> wrote:
> >
> > When compiling for the atmega168 I get this error:
> >
> > if I change the target it assembles fine..
> >
> > what am I missing? (using 2.6f)
> >
> > Assembling: avrx_generatesinglestepinterrupt.S
> > avr-gcc -c -mmcu=atmega168 -I. -x assembler-with-cpp -Wa,-adh
> > lns=avrx_generatesinglestepinterrupt.lst,-gstabs
> > avrx_generatesinglestepinterrup
> > t.S -o avrx_generatesinglestepinterrupt.o
> > avrx_generatesinglestepinterrupt.S: Assembler messages:
> > avrx_generatesinglestepinterrupt.S:39: Error: constant value
> required
> > avrx_generatesinglestepinterrupt.S:39: Error: number must be less
> > than 64
> > avrx_generatesinglestepinterrupt.S:42: Error: constant value
> required
> > avrx_generatesinglestepinterrupt.S:42: Error: number must be less
> > than 64
> > avrx_generatesinglestepinterrupt.S:43: Error: constant value
> required
> > avrx_generatesinglestepinterrupt.S:43: Error: number must be less
> > than 64
> > make: *** [avrx_generatesinglestepinterrupt.o] Error 1
> >
>

--- In avrx@yahoogroups.com, gusimon <zm_gu@...> wrote:

> avr-gcc.exe -I"E:\AVRX\iMP3\..\RTOS\AvrX2.6g\avrx"  -mmcu=atmega16 -Wall
-gdwarf-2 -std=gnu99                             -DF_CPU=8000000UL -O2
-funsigned-char -funsigned-bitfields -fshort-enums -MD -MP -MT Task_Def.o -MF
dep/Task_Def.o.d  -c  ../Task/Task
> _Def.c
>
> In file included from ../Task/Task_Def.c:19:
> ../Task/../avrx.inc:302: error: expected identifier or '(' before '.' token
> ../Task/../avrx.inc:327: error: expected identifier or '(' before '.' token
> In file included from ../Task/Task_Def.c:20:
> ../Task/../avrx.h:113: error: expected identifier or '(' before numeric
constant
> ../Task/../avrx.h:114: error: expected ';' before 'unsigned'
> ../Task/../avrx.h:125: error: expected identifier or '(' before numeric
constant
> ../Task/../avrx.h:126: error: expected ';' before 'struct'
> ../Task/../avrx.h:171: error: expected identifier or '(' before numeric
constant
> ../Task/../avrx.h:172: error: expected ';' before 'Mutex'
> ../Task/../avrx.h:206: error: expected identifier or '(' before numeric
constant
> ../Task/../avrx.h:207: error: expected ';' before 'Mutex'
> ../Task/../avrx.h:374: error: expected identifier or '(' before numeric
constant
> make: *** [Task_Def.o] Error 1

Looks like you are including avrx.inc and avrx.h in Task_Def.c.  Should you only
include avrx.h?

Like I said...

Atmel, the micro Arduino is using, manufactures a large range of chips form 8
pin up to over 100 pin. Somewhere in there their is most likely a micro that
will do the job for me. The problem is Arduino limits themselves to less than a
handfull.

Say for a project you want to use one 8-pin port to read a keypad, one 8-pin
port to control an LCD character display and two pins on a third port to control
a remote device via the RS-232 pins. I have used an 8515 to do just that. That
was about 7 years ago. It has never failed and is still working today. As far as
I know Arduino has nothing that has 3 8-pin ports on it.

Sure, I could have done that multiplexing the use of the ports but having
specific ports to do specific things, no timesharing, made life easier for my
first commercial project.

Mike

--- In avrx@yahoogroups.com, "Swaby, Jonathan F" <jonathan.swaby@...> wrote:
>
> There is an Arduino that is based on some variant of the ATmega128. It is
fairly new and is only supported by the newer releases of the Arduino software.
I think SparkFun and others have it.
> https://www.sparkfun.com/commerce/product_info.php?products_id=9152
>
> It looks as if it is being called the Arduino Mega. Well, at least by
SparkFun.
>
> Nuts and Volts or Servo have had a few articles on programming the Arduino.
The last article went over using WinAVR to program it.
>
> ----- "brewski922" <Brewskister@...> wrote:
> >
> >
> >
> >
> >
> >
>
> I have been tinkering around with AVRs for about 8 years. The reason I ask is
about a month or two ago I purchased the Arduino Duemilanove. It has the
ATmega328. Started looking around, found out that is about all they support. If
I needed a smaller, more cost effective, or bigger, because I needed more
computing power, I'm out of luck. I didn't want to get tied down to such a
limited setup.
> > Mike
> >
> > --- In avrx@yahoogroups.com , "brewski922" <Brewskister@> wrote:
> > >
> > > Tony,
> > >
> > > From what I understand the only AVR devices Arduino supports are ATmega168
and ATmega328. What other AVR divices does Arduino support?
> > >
> > > Mike
> > >
> >
> >
> >
>
> --
> Jonathan Swaby
> IT Program Manager - Student Affairs
> 404-894-5889
> Georgia Institute of Technology
>

I have been tinkering around with AVRs for about 8 years. The reason I ask is
about a month or two ago I purchased the Arduino Duemilanove. It has the
ATmega328. Started looking around, found out that is about all they support. If
I needed a smaller, more cost effective, or bigger, because I needed more
computing power, I'm out of luck. I didn't want to get tied down to such a
limited setup.
Mike


--- In avrx@yahoogroups.com, "brewski922" <Brewskister@...> wrote:
>
> Tony,
>
> From what I understand the only AVR devices Arduino supports are ATmega168 and
ATmega328. What other AVR divices does Arduino support?
>
> Mike
>

Mike,
I believe that is all.  I did not mean to imply that the
Arduino board could be used for general Atmel development.

Tony

--- In avrx@yahoogroups.com, "brewski922" <Brewskister@...> wrote:
>
> Tony,
>
> From what I understand the only AVR devices Arduino supports are ATmega168 and
ATmega328. What other AVR divices does Arduino support?
>
> Mike
>

Tony,

From what I understand the only AVR devices Arduino supports are ATmega168 and
ATmega328. What other AVR divices does Arduino support?

Mike

Arduino is a programming language, but it is also a
microcontroller board.  I think it makes a very nice,
very inexpensive ATmega168 development kit.  You
can completely bypass the Arduino development environment
and write code for the hardware using avr-gcc directly.
(I use WinAVR.)  You can transfer programs to the
Arduino board using avrdude.

I think the original poster is asking if AvrX will run
on the ATmega168.  I haven't tried this, but searching
this forum indicates that others have.  I am not sure
that anyone has been successful.

Many of the newer Arduino boards use the ATmega328
which has twice the memory (flash, eeprom, and ram)
of the ATmega168 and so should make porting AvrX easier
(feasible?). You could also buy an ATmega328 to replace
the 168 on an older Arduino board.
The ATmega328 is supported by the latest releases
of the Arduino language, so you can still use the board
for Arduino programming too.  If you buy a 328 to replace
the 168 on an older board, you will need a programmer
to program the Arduino boot-loader onto the ATmega328
or you will need to buy one with the Arduino boot
loader preloaded.  A google search of "arduino atmega328"
will uncover sites that sell 328s with the Arduino
boot-loader preprogrammed.

Tony Richardson

--- In avrx@yahoogroups.com, Shane Bolton <shane@...> wrote:
>
> Think about what you are wishing for.
>
> Arduino is its own 'C' like environment but does not support
> multitasking.
>
> AVRX is another runtime environment that supports multitasking.
>
> You can't have both.
>
>
> Regards,
>
> Shane Bolton
> shane@...
>
>
>
>
>
> On 17/04/2009, at 7:31 PM, pino_otto wrote:
>
> >
> >
> > I would like to know whether somebody has ported the AVRx to Arduino.
> >
> > I would like to use AVRx on Arduino. Is there any information (how-
> > to) available?
> >
> > Best regards,
> > giovanni
> >
> >
> >
>

Can someone explain how I do so AVRX to work with WinAVR 20090313 in AVR studio
4.16?

Best regards
Leif

I would like to know whether somebody has ported the AVRx to Arduino.

I would like to use AVRx on Arduino. Is there any information (how-to)
available?

Best regards,
giovanni

I'm sure most of you have seen the Vex 6-channel remote sets that have been
on the surplus sites for a while now. MPJA just closed theirs out for $10
each and I finally couldn't resist.

(If you haven't -
http://www.allelectronics.com/make-a-store/item/JS-6/6-CHANNEL-TRANSMITTER-AND-R\
ECEIVER/-/1.html
)

I was wondering if someone had made an ISR type routine to read the output,
possibly just make the chanels available as global variables.  Ideally I
would like to be able to just read the current remote state from AvrX tasks,
like we do encoder values.


==========================================================
Chris Candreva  -- chris@... -- (914) 948-3162
WestNet Internet Services of Westchester
http://www.westnet.com/

Acks apply to the element pulled off the queue.  Queues are FIFO.

-----Original Message-----
From: avrx@yahoogroups.com [mailto:avrx@yahoogroups.com] On Behalf Of
tord.lindner
Sent: Wednesday, February 11, 2009 12:34 PM
To: avrx@yahoogroups.com
Subject: [avrx] Re: Problems with MessageQueue

Good point, I thought since it's a queue, FIFO, that the first message
would be done first and the ack would correspond to that first message
and so on. A good workaround is to use different queues.

cheers, tord


--- In avrx@yahoogroups.com, "Steven Holder" <s.holder123@...> wrote:
>
> Perhaps an intermediate step would be to define a rx_queue for each
uart, it
> seems that the first ackmessage is getting confused and is sending
to the
> wrong mcb
>
> And is therefore not getting reset, in essence you are waiting on one
> message, but ack ing to another, once the first message is received
then the
> next, the context for rx_queue is not switching.
>
>
>
> Try 2 rx_queues with a task for each mcb. See if that helps.
>
>
>
> I assume that the uart is a byte transfer and another tasks deals
with this
> data.
>
>
>
> Regards
>
>
>
>
>
>   _____
>
> From: avrx@yahoogroups.com [mailto:avrx@yahoogroups.com] On Behalf Of
> tord.lindner
> Sent: 11 February 2009 18:14
> To: avrx@yahoogroups.com
> Subject: [avrx] Re: Problems with MessageQueue
>
>
>
> I want to have four 4800 SW-uarts (need the other two as well on the
> mega128). My idea was to have a bit sampler which goes on 50uS ticks
> and every 1mS do a AvrXTimer. One of the four EXT irq kicks it all off:
>
> SIGNAL(SIG_INTERRUPT4) {
> if (! Uart4_State) { // we are in wait for start bit mode
> if (! (PINE & (1 << PE4))) { // this is good, a low start bit
> Uart4_Sample = BYTESAMPLE;// ok, lets start
> Uart4_State++;
> }
> } else if (Uart4_State < 10) { // for all data bytes
> Uart4_Data[Uart4_State ] = PINE & (1 << PE4);
> Uart4_Data[Uart4_State++ + 10] = Uart4_Sample;
> } else Uart4_State = 0; // start all over again
> }
>
> Everything works if I only use one message send to the queue, but if I
> send off two messages to the same queue once, then the very simple
> receiver gets out from AvrXWaitMessage even though nothing has been
> sent more to the message box. It just loops same rate as SIG_OVERFLOW0
> (50Us), guess the epilog at the end, but since no message is available
> it should not return, but it does. Again, only sending one message I
> see that the receiver runs every 2mS (as it should).
>
> Since there is a AvrXIntSendMessage I thought it was possible to send
> a message to a queue from a ISR. Maybe it is limited to only one
message?
>
> thanks for your answers!
>
> cheers,tord
>
> --- In avrx@yahoogroups. <mailto:avrx%40yahoogroups.com> com, Dean Hall
> <dwhall256@> wrote:
> >
> > Well, it's hard to say exactly what's going on because you haven't
> > included all the code. For example, I don't see where Uart4_Sample
> > and Uart5_Sample are set to non-zero values; and what are the values
> > of Uart4_State and Uart5_State?
> >
> > !!Dean
> >
> > > I want a quick running ISR sample bits and send it to a process
> > > waiting for it, the ISP shall at the most send four different
messages
> > > in one loop to the same receiver.
> > >
> > > ///////////////////////////////////////////////
> > > AVRX_GCC_TASKDEF(taskReceiver, RECEIVER_MEM, RECEIVER_PRIO) {
> > > MessageControlBlock * msg;
> > >
> > > for (;;) {
> > > msg = AvrXWaitMessage(& Receive_Queue);
> > > AvrXAckMessage(msg);
> > > PORTG ^= (1 << PG3); // just to see what's happening
> > > }
> > > }
> > > /////////////////////////////////////////////
> > > AVRX_SIGINT(SIG_OVERFLOW0) {
> > > IntProlog();
> > > TCNT0 = TIMERTICK;
> > > if (Uart4_Sample) Uart4_Sample--;
> > > else if (Uart4_State) {
> > > if (AvrXTestMessageAck(& Uart4_Message.mcb) == SEM_DONE) {
> > > AvrXIntSendMessage(& Receive_Queue, & Uart4_Message.mcb);
> > > }
> > > }
> > > if (Uart5_Sample) Uart5_Sample--;
> > > else if (Uart5_State) {
> > > if (AvrXTestMessageAck(& Uart5_Message.mcb) == SEM_DONE) {
> > > AvrXIntSendMessage(& Receive_Queue, & Uart5_Message.mcb);
> > > }
> > > }
> > > if (! timerHandler--) { // only every 1mS
> > > AvrXTimerHandler(); // Call Time queue manager
> > > timerHandler = MILLISEC;
> > > }
> > > Epilog(); // Return to tasks
> > > }
> > >
> > > Queues are primed and it all works well with only one sender. If I
> > > enable both senders (Uart4&Uart5) I can see the receiver process
> > > looping all the time (LED toogles) even though each only two
messages
> > > have been sent.
> > >
> > > Have I missed something, is it not possible to have several messages
> > > queued into one process handling it?
> > >
> > > Cheers, tord
> > >
> > >
> > >
> >
>




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Good point, I thought since it's a queue, FIFO, that the first message
would be done first and the ack would correspond to that first message
and so on. A good workaround is to use different queues.

cheers, tord


--- In avrx@yahoogroups.com, "Steven Holder" <s.holder123@...> wrote:
>
> Perhaps an intermediate step would be to define a rx_queue for each
uart, it
> seems that the first ackmessage is getting confused and is sending
to the
> wrong mcb
>
> And is therefore not getting reset, in essence you are waiting on one
> message, but ack ing to another, once the first message is received
then the
> next, the context for rx_queue is not switching.
>
>
>
> Try 2 rx_queues with a task for each mcb. See if that helps.
>
>
>
> I assume that the uart is a byte transfer and another tasks deals
with this
> data.
>
>
>
> Regards
>
>
>
>
>
>   _____
>
> From: avrx@yahoogroups.com [mailto:avrx@yahoogroups.com] On Behalf Of
> tord.lindner
> Sent: 11 February 2009 18:14
> To: avrx@yahoogroups.com
> Subject: [avrx] Re: Problems with MessageQueue
>
>
>
> I want to have four 4800 SW-uarts (need the other two as well on the
> mega128). My idea was to have a bit sampler which goes on 50uS ticks
> and every 1mS do a AvrXTimer. One of the four EXT irq kicks it all off:
>
> SIGNAL(SIG_INTERRUPT4) {
> if (! Uart4_State) { // we are in wait for start bit mode
> if (! (PINE & (1 << PE4))) { // this is good, a low start bit
> Uart4_Sample = BYTESAMPLE;// ok, lets start
> Uart4_State++;
> }
> } else if (Uart4_State < 10) { // for all data bytes
> Uart4_Data[Uart4_State ] = PINE & (1 << PE4);
> Uart4_Data[Uart4_State++ + 10] = Uart4_Sample;
> } else Uart4_State = 0; // start all over again
> }
>
> Everything works if I only use one message send to the queue, but if I
> send off two messages to the same queue once, then the very simple
> receiver gets out from AvrXWaitMessage even though nothing has been
> sent more to the message box. It just loops same rate as SIG_OVERFLOW0
> (50Us), guess the epilog at the end, but since no message is available
> it should not return, but it does. Again, only sending one message I
> see that the receiver runs every 2mS (as it should).
>
> Since there is a AvrXIntSendMessage I thought it was possible to send
> a message to a queue from a ISR. Maybe it is limited to only one
message?
>
> thanks for your answers!
>
> cheers,tord
>
> --- In avrx@yahoogroups. <mailto:avrx%40yahoogroups.com> com, Dean Hall
> <dwhall256@> wrote:
> >
> > Well, it's hard to say exactly what's going on because you haven't
> > included all the code. For example, I don't see where Uart4_Sample
> > and Uart5_Sample are set to non-zero values; and what are the values
> > of Uart4_State and Uart5_State?
> >
> > !!Dean
> >
> > > I want a quick running ISR sample bits and send it to a process
> > > waiting for it, the ISP shall at the most send four different
messages
> > > in one loop to the same receiver.
> > >
> > > ///////////////////////////////////////////////
> > > AVRX_GCC_TASKDEF(taskReceiver, RECEIVER_MEM, RECEIVER_PRIO) {
> > > MessageControlBlock * msg;
> > >
> > > for (;;) {
> > > msg = AvrXWaitMessage(& Receive_Queue);
> > > AvrXAckMessage(msg);
> > > PORTG ^= (1 << PG3); // just to see what's happening
> > > }
> > > }
> > > /////////////////////////////////////////////
> > > AVRX_SIGINT(SIG_OVERFLOW0) {
> > > IntProlog();
> > > TCNT0 = TIMERTICK;
> > > if (Uart4_Sample) Uart4_Sample--;
> > > else if (Uart4_State) {
> > > if (AvrXTestMessageAck(& Uart4_Message.mcb) == SEM_DONE) {
> > > AvrXIntSendMessage(& Receive_Queue, & Uart4_Message.mcb);
> > > }
> > > }
> > > if (Uart5_Sample) Uart5_Sample--;
> > > else if (Uart5_State) {
> > > if (AvrXTestMessageAck(& Uart5_Message.mcb) == SEM_DONE) {
> > > AvrXIntSendMessage(& Receive_Queue, & Uart5_Message.mcb);
> > > }
> > > }
> > > if (! timerHandler--) { // only every 1mS
> > > AvrXTimerHandler(); // Call Time queue manager
> > > timerHandler = MILLISEC;
> > > }
> > > Epilog(); // Return to tasks
> > > }
> > >
> > > Queues are primed and it all works well with only one sender. If I
> > > enable both senders (Uart4&Uart5) I can see the receiver process
> > > looping all the time (LED toogles) even though each only two
messages
> > > have been sent.
> > >
> > > Have I missed something, is it not possible to have several messages
> > > queued into one process handling it?
> > >
> > > Cheers, tord
> > >
> > >
> > >
> >
>

I want to have four 4800 SW-uarts (need the other two as well on the
mega128). My idea was to have a bit sampler which goes on 50uS ticks
and every 1mS do a AvrXTimer. One of the four EXT irq kicks it all off:

SIGNAL(SIG_INTERRUPT4) {
if (! Uart4_State) { // we are in wait for start bit mode
	 if (! (PINE & (1 << PE4))) { // this is good, a low start bit
	 Uart4_Sample = BYTESAMPLE;// ok, lets start
	 Uart4_State++;
         }
} else if (Uart4_State < 10) { // for all data bytes
	 Uart4_Data[Uart4_State       ] = PINE & (1 << PE4);
	 Uart4_Data[Uart4_State++ + 10] = Uart4_Sample;
	 } else Uart4_State = 0; // start all over again
}

Everything works if I only use one message send to the queue, but if I
send off two messages to the same queue once, then the very simple
receiver gets out from AvrXWaitMessage even though nothing has been
sent more to the message box. It just loops same rate as SIG_OVERFLOW0
(50Us), guess the epilog at the end, but since no message is available
it should not return, but it does. Again, only sending one message I
see that the receiver runs every 2mS (as it should).

Since there is a AvrXIntSendMessage I thought it was possible to send
a message to a queue from a ISR. Maybe it is limited to only one message?

thanks for your answers!

cheers,tord


--- In avrx@yahoogroups.com, Dean Hall <dwhall256@...> wrote:
>
> Well, it's hard to say exactly what's going on because you haven't
> included all the code.  For example, I don't see where Uart4_Sample
> and Uart5_Sample are set to non-zero values; and what are the values
> of Uart4_State and Uart5_State?
>
> !!Dean
>
> > I want a quick running ISR sample bits and send it to a process
> > waiting for it, the ISP shall at the most send four different messages
> > in one loop to the same receiver.
> >
> > ///////////////////////////////////////////////
> > AVRX_GCC_TASKDEF(taskReceiver, RECEIVER_MEM, RECEIVER_PRIO) {
> > MessageControlBlock * msg;
> >
> > for (;;) {
> > msg = AvrXWaitMessage(& Receive_Queue);
> > AvrXAckMessage(msg);
> > PORTG ^= (1 << PG3); // just to see what's happening
> > }
> > }
> > /////////////////////////////////////////////
> > AVRX_SIGINT(SIG_OVERFLOW0) {
> > IntProlog();
> > TCNT0 = TIMERTICK;
> > if (Uart4_Sample) Uart4_Sample--;
> > else if (Uart4_State) {
> > if (AvrXTestMessageAck(& Uart4_Message.mcb) == SEM_DONE) {
> > AvrXIntSendMessage(& Receive_Queue, & Uart4_Message.mcb);
> > }
> > }
> > if (Uart5_Sample) Uart5_Sample--;
> > else if (Uart5_State) {
> > if (AvrXTestMessageAck(& Uart5_Message.mcb) == SEM_DONE) {
> > AvrXIntSendMessage(& Receive_Queue, & Uart5_Message.mcb);
> > }
> > }
> > if (! timerHandler--) { // only every 1mS
> > AvrXTimerHandler(); // Call Time queue manager
> > timerHandler = MILLISEC;
> > }
> > Epilog(); // Return to tasks
> > }
> >
> > Queues are primed and it all works well with only one sender. If I
> > enable both senders (Uart4&Uart5) I can see the receiver process
> > looping all the time (LED toogles) even though each only two messages
> > have been sent.
> >
> > Have I missed something, is it not possible to have several messages
> > queued into one process handling it?
> >
> > Cheers, tord
> >
> >
> >
>