Dual rs232<->Ethernet

[asdus]

Hi all.
For my home automation i need to use 2 rs232<->ethernet converters
I'm buy Ethernut V 1.3 H board and try to make it, using rs232d, Basic
TCP Server and Serial Port Monitor examples.
Using that i need to do this in dedicated threads, because i'm use
other ethernut's digital pins to get home events. All my tries fails,
i have lags using my remote rs232's.

Can anyone with code or part of code, that's can help me to resolve my
problem? Great thanks!
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[uprinz]

Hi!

I am not sure, if I understand that correctly:
You'd like to communicate with two RS232 ports via TCP/IP.
In nut/app/rs232d there is a demo for doing that with one single port.
So you can duplicate the THREAD and assign the second one to a different
port. As a connection like that cannot be shared, only one client can
access one RS232 port. So you do not need to take care of launching
several threads per port.

To access GPIOs of the CPU there are different options. You can watch
the RS322 communication an catch special commands, that are not routet
to the RS232 port but are used to control or read GPIOs.

Or you can launch a third server thread that controls the GPIOs.

If your code doesn't work, you can post parts of the code in here, so we
can help.

Regards
Ulrich

asdus schrieb:

> Hi all.
> For my home automation i need to use 2 rs232<->ethernet converters
> I'm buy Ethernut V 1.3 H board and try to make it, using rs232d, Basic
> TCP Server and Serial Port Monitor examples.
> Using that i need to do this in dedicated threads, because i'm use
> other ethernut's digital pins to get home events. All my tries fails,
> i have lags using my remote rs232's.
>
> Can anyone with code or part of code, that's can help me to resolve my
> problem? Great thanks!
> _______________________________________________
> http://lists.egnite.de/mailman/listinfo/en-nut-discussion

_______________________________________________
http://lists.egnite.de/mailman/listinfo/en-nut-discussion

[asdus]

Yep, you're right. But rs232d primer have some troubles.
Yes, it's have buffers to resolve different speed problems, but
connection stucks, if ethernet client disconnect unclean, and,
sometimes, i'm have strange data freezes, when i receive sended data
only on next connection.

2009/10/30 Ulrich Prinz <uprinz2@...>:

> I am not sure, if I understand that correctly:
> You'd like to communicate with two RS232 ports via TCP/IP.
> In nut/app/rs232d there is a demo for doing that with one single port.
> So you can duplicate the THREAD and assign the second one to a different
> port. As a connection like that cannot be shared, only one client can
> access one RS232 port. So you do not need to take care of launching
> several threads per port.
>
> To access GPIOs of the CPU there are different options. You can watch
> the RS322 communication an catch special commands, that are not routet
> to the RS232 port but are used to control or read GPIOs.
>
> Or you can launch a third server thread that controls the GPIOs.
>
> If your code doesn't work, you can post parts of the code in here, so we
> can help.
>
> Regards
> Ulrich
>
> asdus schrieb:
>> Hi all.
>> For my home automation i need to use 2 rs232<->ethernet converters
>> I'm buy Ethernut V 1.3 H board and try to make it, using rs232d, Basic
>> TCP Server and Serial Port Monitor examples.
>> Using that i need to do this in dedicated threads, because i'm use
>> other ethernut's digital pins to get home events. All my tries fails,
>> i have lags using my remote rs232's.
>>
>> Can anyone with code or part of code, that's can help me to resolve my
>> problem? Great thanks!

_______________________________________________
http://lists.egnite.de/mailman/listinfo/en-nut-discussion

[uprinz]

Hi!

Yes, if you take a look at the previous discussion of the last few
weeks, you'll see, that there are some problems existing in the TCP/IP
stack.
But what you tell is that connections are not completely handled, as a
TCP COnnection may break at any time. So try to find a good point where
to monitor that situation and clean up the system to a default where it
accepts new data and connection.

But without code it's hard to tell.

Regards, Ulrich
asdus schrieb:

> Yep, you're right. But rs232d primer have some troubles.
> Yes, it's have buffers to resolve different speed problems, but
> connection stucks, if ethernet client disconnect unclean, and,
> sometimes, i'm have strange data freezes, when i receive sended data
> only on next connection.
>
> 2009/10/30 Ulrich Prinz <uprinz2@...>:
>> I am not sure, if I understand that correctly:
>> You'd like to communicate with two RS232 ports via TCP/IP.
>> In nut/app/rs232d there is a demo for doing that with one single port.
>> So you can duplicate the THREAD and assign the second one to a different
>> port. As a connection like that cannot be shared, only one client can
>> access one RS232 port. So you do not need to take care of launching
>> several threads per port.
>>
>> To access GPIOs of the CPU there are different options. You can watch
>> the RS322 communication an catch special commands, that are not routet
>> to the RS232 port but are used to control or read GPIOs.
>>
>> Or you can launch a third server thread that controls the GPIOs.
>>
>> If your code doesn't work, you can post parts of the code in here, so we
>> can help.
>>
>> Regards
>> Ulrich
>>
>> asdus schrieb:
>>> Hi all.
>>> For my home automation i need to use 2 rs232<->ethernet converters
>>> I'm buy Ethernut V 1.3 H board and try to make it, using rs232d, Basic
>>> TCP Server and Serial Port Monitor examples.
>>> Using that i need to do this in dedicated threads, because i'm use
>>> other ethernut's digital pins to get home events. All my tries fails,
>>> i have lags using my remote rs232's.
>>>
>>> Can anyone with code or part of code, that's can help me to resolve my
>>> problem? Great thanks!
> _______________________________________________
> http://lists.egnite.de/mailman/listinfo/en-nut-discussion

_______________________________________________
http://lists.egnite.de/mailman/listinfo/en-nut-discussion

[asdus]

Hi all!
After some tries I'm get fully workable code. You can see that here:
http://pastebin.mozilla-russia.org/102504

But I still have rare freezes, and need to manually reset my device.
Have a chance to resolve this?

2009/10/27 asdus <asdusik@...>:
> Hi all.
> For my home automation i need to use 2 rs232<->ethernet converters
> I'm buy Ethernut V 1.3 H board and try to make it, using rs232d, Basic
> TCP Server and Serial Port Monitor examples.
> Using that i need to do this in dedicated threads, because i'm use
> other ethernut's digital pins to get home events. All my tries fails,
> i have lags using my remote rs232's.
_______________________________________________
http://lists.egnite.de/mailman/listinfo/en-nut-discussion

[uprinz]

Hi!

Only had a short look into your code:

You should set NutThreadSetPriority() inside the Threads. Probably the
same priority for all of them. You should not rise the main() routines
priority to 128. Background is, that NutThreadSetPriority() sets the
priority of the task it is called from. And calling it in main will
modify the prio of the main task, that is doing nothing in your application.

So delete line 143 and do a NutSleep(5000), or if you have a blinking
LED for giving an 'alive' signal, toggle it there and do a NutSleep(
1000) there.
Insert NutThreadSetPriority(50) in the two tasks before going into the
main loop of the task ( i.e. for(;;) {) at lines 54 and 74.
So all four tasks have same priority and are called round and round.

You're using NutThreadYeald() so, if this function is reached, the
thread releases the CPU to the next waiting thread. This will normally
lead to the same result than giving all tasks the same priority.
Remember that if there is only one thread with a higher priority, it
will always be the next called every NutThreadYeald(). Therefore it is
better to actively set priorities.

You do not do any buffer checking. So if one of the receiving or sending
queues is running out of buffer, you have no chance to react.
To find out, what is happening on the crashes, you should enable some
debug and may be constantly printf your free memory.
You could add a line of code in StreamCopy() to check if the
buff=malloc() did return something != NULL, as NULL means that there was
not enough memory to reserve as requested.
Put a debug inside to see if that condition happens.

And, I think, if a free(NULL) is issued, something crashes. I am not
sure, but put that while(){} loop inside an:
if( buff) {
   loop
}
else {
   Debug() <- could be printf("No MEM!\n")
   free(buff)
}

If the debug comes, you know two things:
1) You run into conditions, where no memory is available anymore
2) I was was wrong and the free(buff) can be called when the malloc
failed and buff is NULL.

If it still crashes, and there is only a part of the debug or no debug,
add a
fflush( stdout) behind the debug and try again.
If now the debug comes, you put free(buff) out of else into if and if
now debug works you have only one problem left:
You need to find out, why now the system does not crash, but looses data
cause there are no buffers available.

Please check the behavior of fread. I am mixing that up often, but there
are functions that _wait_ for data to arrive and have a timeout and are
blocking and there are ones that take what is available and do not block
if there is no data available.
So if you use one of the blocking ones to read from usart or network,
the buffer of the other thread may fill up, while the thread is waiting,
blocked by the active thread.
It is better to use the non-blocking function or set a timeout of a very
low to nothing value for the blocking ones. So you will more often
switch from one task to the other but you work with smaller buffers and
higher 'sampling' of data to transfer.

Best regards
Ulrich

asdus schrieb:

> Hi all!
> After some tries I'm get fully workable code. You can see that here:
> http://pastebin.mozilla-russia.org/102504
>
> But I still have rare freezes, and need to manually reset my device.
> Have a chance to resolve this?
>
> 2009/10/27 asdus <asdusik@...>:
>> Hi all.
>> For my home automation i need to use 2 rs232<->ethernet converters
>> I'm buy Ethernut V 1.3 H board and try to make it, using rs232d, Basic
>> TCP Server and Serial Port Monitor examples.
>> Using that i need to do this in dedicated threads, because i'm use
>> other ethernut's digital pins to get home events. All my tries fails,
>> i have lags using my remote rs232's.
> _______________________________________________
> http://lists.egnite.de/mailman/listinfo/en-nut-discussion

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