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Re: Issue: "kernel does not support PPP filtering"

antonio.ga...@gmail.com (Antonio Galea) — Fri, 17 May 2013 21:05:54 UT

Maybe I'm wrong, but I'd say that PPP features are compiled as modules
by default. Have a look again at your kernel configuration - if I'm
correct, just recompile the modules too and copy them to you uSD card.

Antonio

Re: RS485 timing issue

tanzi...@acmesystems.it (Sergio Tanzilli) — Fri, 17 May 2013 14:15:19 UT

Ok I have a theory about this problem.

Checking the signals at bit level with an oscilloscope I didn't find
any timing problems (just +1.1% at 9600 baud)
or spurious characters sent to the bus.

I think the problem is another.

The RS485 chip Drive Enable signal on DAISY-10 is active when in HI

Re: RS485 timing issue

tanzi...@acmesystems.it (Sergio Tanzilli) — Fri, 17 May 2013 13:00:23 UT

I did the first test using the Python program in attach and the timing
seems to be good (9730 baud instead of 9600 = 1.1% faster ).

Could be useful to verify with your oscilloscope the timing also with
just one 0x55 character (setting tokenlen=1 in the source example).

The bit timing on my Terra board is 102.95uS

Re: RS485 timing issue

ondrej.wisniew...@gmail.com (Ondrej Wisniewski) — Fri, 17 May 2013 08:46:44 UT

Hi Yves,

we have analysed the electrical signals of the data transmission with an
oscilloscope and not seen any significant difference between the
Daisy-10 module and the USB-RS485 converter. The communication seems to
be correct at this level. However our software receives one extra byte

RE: RS485 timing issue

yves.para...@belgacom.net (Yves.Paradis) — Thu, 16 May 2013 19:03:09 UT

Thanks a lot for your reply Ondrej,

I'm happy to know that I'm not completely crazy and that other people had
the same issue.

I will buy a USB to RS485 as you suggest, but it's a pity that what is sold
by ACME system doesn't work... or at least doesn't work properly.

Do you know where I can send a complain (gently) for the serial Linux Driver

Issue "kernel does not support PPP filtering" - Further developments

mafava...@mac.com (Mauri) — Thu, 16 May 2013 17:34:39 UT

Dear friends and colleagues,
as I promised I tried to collect some more data. The problem is still
there, but the way it appears begins to circumscribe.
As I mentioned on an earlier post, the essence of the problem is I get a
message
"kernel does not support PPP filtering"
even if PPP filtering is enabled. The reasons it did happen were totally

Re: Issue: "kernel does not support PPP filtering"

mafava...@mac.com (Mauri Favaron) — Thu, 16 May 2013 09:34:20 UT

Thank for your quick answer!

Well, I've done... Or to be more precise, I "think" having done. In some
way I haven't, however...

I try to explain a bit more quietly.

My first kernel compile did not include PPP filtering. All what I did
was uncommenting the line enabling USART support on ttyS5 and ttyS6: I

Re: Issue: "kernel does not support PPP filtering"

mafava...@mac.com (Mauri) — Thu, 16 May 2013 09:10:57 UT

Thank you, Mike, for your quick reply!

The modem is connected to ttyS1. I'm not using the Daisy connector, but a
card my company developed for a specific application. Basically the card
cares of serial line routing, providing a nearby power source to the modem,
and giving a minimal (to date) EMC protection.

Re: Issue: "kernel does not support PPP filtering"

m.lath...@gmail.com (Michael Lathion) — Wed, 15 May 2013 17:21:55 UT

Is your modem on ttys5 ? Because on your log pp0 seems to connect on ttys1. Is that right? Maybe you have to change config file.
Michael

Envoyé de mon téléphone.

Le 15 mai 2013 à 16:56, Mauri <mafava...@mac.com> a écrit :

Issue: "kernel does not support PPP filtering"

mafava...@mac.com (Mauri) — Wed, 15 May 2013 14:56:30 UT

Hello!
I have a problem with kernel configuration pertaining use of Telit
GM862-GPS modem + /dev/ttyS5 and /dev/ttyS6 ports. Sure I'm doing something
very wrong, but am not able to realize what. May someone help me, please?
Here's what I've done.
I downloaded the kernel source tree as explained in

Re: RS485 timing issue

ondrej.wisniew...@gmail.com (Ondrej Wisniewski) — Mon, 13 May 2013 12:02:18 UT

Hi Yves,

we had similar issues here communicating at 9600baud with a Modbus
device, using the daisy-10 RS485 module. Higher baudrates worked fine.
We couldn't solve the problem but the conclusion was that this seems to
be an issue with the Linux serial driver.

Just use a USB to RS485 converter. Works fine is is cheaper.

RS485 timing issue

yves.para...@belgacom.net (Yves Paradis) — Sat, 11 May 2013 23:27:28 UT

Dear All,

I’m trying to communicate with an RS485 device, using the daisy-10 RS485
module and programming in ansi C. I know that the data sent to the remote
device are right since I tested them directly with a RS485-TCP converter.

The problem is that with the daisy -10 RS485 module, the communication is

Re: Help compiling kernel

superga...@gmail.com (Michelinok) — Wed, 20 Mar 2013 17:10:15 UT

This is what I get if I use my uImage:
RomBOOT
AcmeBoot 1.22 - Jun 28 2012 13:48:22
MCK = 132MHz
MAC: 000425789AEC
Nothing else...
Any idea????????????????
Many thanks!

Re: Help compiling kernel

superga...@gmail.com (Michelinok) — Tue, 19 Mar 2013 21:28:05 UT

i have tryed updating To the latest pizzica, now i cannot See anymore
The message of jumping To kernel. placing An original sd It boot ok.

Re: Help compiling kernel

superga...@gmail.com (Michelinok) — Tue, 19 Mar 2013 20:35:07 UT

I forgot to say that i get the "...booting kernel." if i reboot after
changing the uImage.

When i try to cold boot (after changing the uImage) I get this:

AcmeBoot 1.18
MCK = 132MHz
AT45DB642D found
Flash id: 0x0000281F
Pg #: 8192
Pg s: 1056
MAC: 000425789AE7
machtype=3129
Jump to Kernel