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Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 42 threads matching "hdlc"
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The most relevant threads are listed first
Recommend SDLC/HDLC IC
2006-06-26 13:03:00
Dear friends,
I am looking for a SDLC/HDLC chip that can be interfaced through PCI
bus. I found Infinion makes such type of IC's (DSSC4) but they are
discontinued.
Please recommend other IC/manufacturers that support HDLC/SDLC through
PCI.
Regards,
Suresh
...
Embedded HDLC processing board
Dmitry - 2005-01-11 18:44:00
Hi, does anybody know good a cPCI and potentially ATCA board for
embedded HDLC processing? What I am looking for is an embedded
softswitch for the HDLC packets. It should be able to process them
depending on the content and forward between interfaces. E1/T1,
Ethernet and H.110 should be all pres...I need HDLC transceiver for interfacing with Serial Communication Controller
magalingam - 2007-12-01 07:20:00
Hello Sir,
I have to interface Serial communication controller- SCC(PEB20534) with
HDLC transceiver through synchrocous signals(TXCLK,RXCLK,TXDATA,RXDATA).
Can you tell me the HDLC transceiver with RS232/RS422?
Regards,
N.Magalingam
...Looking for 3.3V SCC that can do HDLC
Anton Erasmus - 2004-07-27 16:24:00
Hi,
Can anyone recommend a nice Serial Communications Controller, in a
QFP or similar package that can do HDLC at rates at least up to
1Mb/s. It also needs to be able to run from a 3.3V supply, and
preferably have 5V tolerant inputs on the serial side.
Regards
Anton Erasmus
...HDLC Synchronous RS232
sunil - 2005-05-27 12:01:00
hi all,
iam currently programming MC68360 board processor SCC's to work for
Synchronous HDLC and iam taking out RS232 pin outs from the P2
connector.
I have initialized the registers and set jumpers according to the
instructions. but iam not getting the Clock signals from the TXCLK
lines....MC68360 HDLC/SDLC.
Cristian Brambilla - 2004-12-14 08:24:00
Sorry if the questions sound silly, but I'm a newbie . . .
I need to develop the SDLC protocol for the MC68360.
I read that this processor supports the HDLC protocol.
My questions are:
1) Can someone point me to a URL where I can download a
driver for the MC68360 able to address RS232 and/or
...about HDLC/SDLC IC's
tguclu - 2007-08-07 06:03:00
Hi
Does anyone used a peripheral IC for HDLC/SDLC implementation ? Can
you advice me ?
I'm undecided between Infineon 20542(2 Channel Serial Optimized
Communication Controller
with DMA-SEROCCO-D) and Zilog's Z85C30
What I need is ;
-3x USART outputs (i will have to use 2xIC's for that)
-SD...USB synchronous serial port
Stein Erik Andresen - 2004-04-30 18:04:00
I'm looking for a synchronous serial adapter for USB. The device will
be used for HDLC communication (framing only) on a laptop (no PCMCIA
available, just USB). Preferably RS-232 / V.24 interface. Does such a
thing exist?
S.E.
...Re: Designing a protocol for the first time
Arlet - 2008-03-03 01:48:00
On Mar 3, 4:36 am, CC wrote:
> I wish to transfer binary data in the simplest way possible from a PC to
> either an AVR or TMS320F2812 embedded target via USB.
You may be interested in RFC 1549 "PPP in HDLC framing", see
http://www.ietf.org/rfc/rfc1549.txt
The frame format is simple ...Re: MCU with 3 UARTs
tguclu - 2007-09-10 03:15:00
On Sep 7, 6:32 pm, ratemonotonic wrote:
> Hi all,
>
> Has anyone used a Low power MCU with 3 hardware UARTs.
>
> Any help appreciated.
>
> Thanks
> Niladri Bose.
Hi
I have a similar question , has anyone used a low power (3.3V) with 3
XUSART modules.(I'm trying to implement S...Re: Communications controller?
Dave Hansen - 2005-06-24 09:30:00
On 24 Jun 2005 00:11:41 -0700, "linnix" wrote:
[...]
>
> USB is just a form of I2C.
>
Huh?
Either you know nothing about USB, or you know nothing about I2C, or
you would be just as happy with the statement that "Ethernet is just a
form of HDLC." Or some combination thereof.
FT...Re: Does free RTOS Object file can fit in ARM7 (Philips 2106) microcontroller?.
2005-06-05 13:16:00
I have two serial ports, SPI, I2C, I need to do some communication over
the serial ports, I don't think I can do some network based since ARM7
controller don't have any interface to ethernet. Probably I need TCP/IP
stack if I want to do some PPP over HDLC (serial port), even if TCP/IP
not availa...Re: USART design consideration
Anton Erasmus - 2007-07-21 05:03:00
On Tue, 17 Jul 2007 03:50:03 -0700, tguclu
wrote:
> Hi everyone ,i'm new to group.
> In my project i need to use 3xUSART ports in order to build a SDLC
> network. USART ports will function as the phy of SDLC as V.24
> Anyway , this is not the point.
>
> Each USART will work at 64kbps. ...ISDN U-transceiver
Rene - 2004-03-02 13:25:00
Hello folks,
I am looking for an ISDN U transceiver in 3.3V technologie. So far I've
checked Motorolas MC145572 (5V) and some Infineon parts. The older Infineon
parts are 5V too and the SMINT series are a bit of an overkill (intelligent
NT chip with U and S/T transceiver).
Does anyone know ...Re: Implementing communication over RS-485
Grant Edwards - 2006-09-09 12:57:00
On 2006-09-09, Meindert Sprang wrote:
> > Yes, ModBus is a workable solution.
>
> You must be joking. A protocol that relies on inter-frame times for
> delimiting the frames is a major PITA.
> It is much easier to either use escapes for frame delimiters or a 9th bit to
> flag an add...Re: Developmet kit for embedded education
Anton Erasmus - 2005-02-06 13:21:00
On Sun, 6 Feb 2005 13:19:08 +0000, Chris Hills
wrote:
> In article , R Adsett eolusdevelopment.cm> writes
> > In article , chris@phaedsys.org
> > says...
> > > 8051 (any one of the 600+ varients from 30+ silicon vendors) There is no
> > > peripheral that the 8051 family does not...Re: RS-485 implementation on Lantronix XPort-485
Meindert Sprang - 2007-02-06 09:08:00
"Frank" wrote in message
news:1170766700.676776.204620@v33g2000cwv.googlegroups.com...
> Hi,
>
> just browsed the manuals for Lantronix' XPort-485 (http://
> www.lantronix.com/support/documentation.html) and I'm a little bit
> confused:
>
> > From RS-485 spec I understood, that 485...Re: bluetooth vs. 802.11 in the embedded world
Max - 2004-03-02 09:33:00
On Tue, 02 Mar 2004 09:40:36 +0000, Jeremy Bentham wrote:
> The Bluetooth Personal Area Network (PAN) was designed as a wireless
> replacement for simple point-to-point links, so if you only need
> RS232-type functionality, then that might be the direction to go.
I don't think that's an accu...Re: Cheap chip
Jim Granville - 2004-02-18 20:01:00
Nadav wrote:
> Thanks Jim,
>
> SMI (serial management interface) is a two wire protocol specify up to
> 2Mhz.
> I plan to implement it using three of the I/O pins.
>
> You right there is no OR. I meant other not 8051-compatible 8-bit
> micro. like COP8 and such.
>
> Those part...Looking for high-speed serial protocol (FPGA implementation)
Kenneth Porter - 2007-10-27 14:55:00
I've found that my vendor has a 4-wire RS-485 full-duplex connection into
an FPGA fast enough to handle 5-10 Mbits, and I'd like to coordinate
communication using that interface (together with some isolators). What
would be a good protocol for exchanging packets of 4-20 32-bit words, with
ac...Re: RS232 or USB to RS485
Anton Erasmus - 2004-02-11 15:41:00
On 11 Feb 2004 14:34:00 GMT, Hans-Bernhard Broeker
wrote:
> Grant Edwards wrote:
> > On 2004-02-11, Meindert Sprang wrote:
>
> > > Lately I see people here talking about 2-wire and 4-wire
> > > RS485. Isn't RS-485 *always* 2 wire?
>
> > No. If you use separate RS485 drive...Re: Different devices on RS485 line?
Meindert Sprang - 2007-03-16 03:30:00
"ElderUberGeek" wrote in message
news:1174029439.926590.59100@p15g2000hsd.googlegroups.com...
>
> As RS485 is multi-drop, one would assume that you can hang multiple
> devices on the same line (meaning different devices of different
> makes, like say two controllers from two different ma...Re: RS485 CSMA/CD protocol
Henrik Johnsson - 2005-09-23 02:53:00
Steve at fivetrees wrote:
> wrote in message
> news:1127439995.520337.174470@g44g2000cwa.googlegroups.com...
> > My hint would be...Don't.
> >
> > I've been curious about this sort of thing myself, and as far as I can
> > tell from web research no one out there has ever got it wor...Re: Atmel AVR CAN
Jim Granville - 2004-04-21 22:51:00
Ulf Samuelsson wrote:
> "Erik Hermann" skrev i meddelandet
> > Don wrote:
> > > Has anyone heard when the CAN version of the Mega128 will be commonly
> > > available.
> >
> > It seems that first samples are available, the german representative
> > already has a working development board ...Re: Crc16 on power failure
David Empson - 2007-01-23 04:52:00
Arlet wrote:
> Mr. C wrote:
>
> > I am pretty sure Crenshaw's article was written with serial
> > communications in mind. But, memories can also fail such that as
> > bytes are processed, there are groups or "bursts" of errors. Yes, you
> > can arrange the array any way you w...Re: Self restarting property of RTOS-How it works?
Eric P. - 2005-02-14 12:40:00
CBFalconer wrote:
>
> I think I misconstrued your 'synchronized clock'. You are not
> talking about time, but about a data clock, i.e. a strobe. In this
> case I consider the whole design flawed, because once more I don't
> want to trust to statistics. The transmitter should be emittin...Re: Atmel AT91SAM7S Manchester encoder/decoder
Meindert Sprang - 2006-08-11 03:13:00
"Stef" wrote in message
news:22591$44daefe4$54f63171$27560@publishnet.news-service.com...
> Anyone used the manchester encoder/decoder on the Atmel AT91SAM7S?
> I am currently trying to get it to work on the SAM7S-EK (SAM7S256).
>
> When I enable the manchester, I see my transmitted data...Re: frames in communication protocols
Michael N. Moran - 2007-12-05 07:30:00
richard.melikson@gmail.com wrote:
> Hello,
>
> Communication protocols can be divided to several levels. My question
> here is about the "frame" level.
>
> Most simple protocols consist of some start byte, then data of a fixed
> length, then a checksum and then an end byte.
> This ...Re: MPC870
Geir Frode Raanes Sørensen - 2004-08-31 06:09:00
Paul E. Bennett wrote:
: Martin Euredjian wrote:
:
:> I've been considering the idea of adopting the Freescale (a.k.a. Motorola)
:> MPC870 processor for a board requiring ethernet, serial, USB (host and
[SNIP]
:> One of the interesting things about this family of processors is that,...Re: Please Recommend Wireless Protocol and How-To/Tutorial
Murray R. Van Luyn - 2004-11-06 11:59:00
Hi Usenet,
This is a popular search. Lots of people buy tiny RF modules and then go
looking for a protocol, myself included.
I looked at a lot of stuff and concluded that I was better off, and
certainly from an educational standpoint, writing my own.
I have 3/4 baked 8051 pseudocode for a...Re: Simple but reliable checksum for small controllers
Blakely LaCroix - 2008-06-09 14:13:00
Tilmann Reh wrote:
> Hello,
>
> for an integrity check of the program code for small controller (8051
> derivatives), I am looking for an efficient checksum method.
>
> The code size will be max. 32k, and a standard 8051 (X2) should manage
> to calculate the checksum in a reasonable ...Re: Manchester encoding
Noone - 2006-05-19 09:48:00
BobG wrote:
> Use a CRC 16 at the end of the message.
> Easy to compute. error detection is 1 part in 2^16.
> =======================================
> Hi Blakely. How does the transmitter know if it got through? (one way
> comms usually, right?)
A real communication protocol general...Re: Electrical gigabit transmission ?
Joseph H Allen - 2007-01-30 14:15:00
In article ,
Michael Weiss wrote:
> Hi all,
> I wonder what is curently state-of-the art in serial high-speed transmission
> and what are the prevailing data rates? I know about some SerDes in the
> gigabit-per-second range but I cannot imagine if 10 Gbps are really a
> challenge or ...Re: 300baud FSK over GSM
R. Mark Clayton - 2004-09-29 10:17:00
"Denis Gleeson" wrote in message
news:184c35f9.0409290304.1fed30b4@posting.google.com...
> Hello All
>
> We are attempting to get 300baud FSK data over a GSM link.
>
> Ive seen different postings on this in the past and the concensus
> is that it may be possible given that its FSK...Re: Multi-drop network
2005-11-07 20:19:00
Are you sure you want PC104 and not PC104+? The PC104 with an ISA bus
is going to be a limitation. At least with PC104+ you get a PCI bus.
I've used some of Sealevel.com's PC104 equipment for RS422 on a 20+
node network. They have a new product that supports 10M bps, but not
quite your 3Mbyt...Re: RS485, multidrop protocol
- - 2004-11-15 04:31:00
Consider IrDA. It is:
- Half duplex
- Has discovery
- CheckSum (HDLC)
- Is well documented
- Can be small
- Multiple baudrates
- Need some minor modifications
- Easy design platform (if you first start with the ir implementation).
- etc.
I'm also using it for a RS485 network and is wor...Re: Need a simple protocol
Tauno Voipio - 2006-07-20 05:57:00
Daveb wrote:
> Hi,
>
> I'm involved in an application which has a up to 10 multidrop devices
> at the other end of a 4km length of cable. We need to implement a
> communications protocol which will allow a master to reliably
> communicate with the slave devices. Due to the distance, the...ATmeag128 8Mhz with Z85c30 SCC(zilog)
sebastiankoo - 2008-02-25 10:41:00
Hello.
I am coding to build-up SDLC(HDLC) in z85c30 with MCU,
ATmega128.
I am trying to build-up SDLC(HDLC) protocal
H/w environment is z85c30(CMOS) with 4.91520Mhz crystal for PCLK.
Also, z85c30's D0~D7 is connected with MCU in un-multiplexed
mode(=direct)
communication specificat...Re: Need DSP recommendation
Paul Keinanen - 2004-01-08 02:52:00
On 5 Jan 2004 10:56:46 -0800, ragarwal@fit.edu (Rahul Agarwal) wrote:
> My application is the following. The processor is connected to an
> analog sensor. It needs to sample the sensor to a 10-bit digital value
That should not be a problem, so I do not think that you need a DSP.
> and tr...Re: Understanding USB
Anton Erasmus - 2005-06-03 12:43:00
On Thu, 02 Jun 2005 17:24:33 -0500, Richard Owlett
wrote:
> Anton Erasmus wrote:
>
> > On Wed, 01 Jun 2005 15:58:26 -0500, Richard Owlett
> > wrote:
> >
> >
> > > I have a "black box" which has acquired and stored 10-16 MBytes of data.
> > >
> > > I wish to transfer it to m...