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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 654 threads matching "rs232"
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The most relevant threads are listed first
RS232 VB6 HELP!
electro - 2006-04-03 21:37:00
i have a microcontroller which i want to interface to my PC thorugh VB
using the rs232 connection..
i wish to use the RTS/CTS as well as the DTR signal pins from the
rs232..
1.RTS will be used to simply reset/start the microconotroller
application(rs232 output) through a port input pinof the mc...
Need a RS232 PCI card that works with optos
Rumpelstiltskin - 2009-05-26 11:55:00
I have test equipment with optically isolated RS232 ports.
Seems modern RS232 ports do not support +/-12V.
They all seem to be less than +/-8V, many only +/-5V.
Anybody know of a cheap source for +/-12V RS232 PCI serial boards?
What ever happened to 1488/1489 serial drivers?
...RS232 on PocketPC
Joris Dobbelsteen - 2004-08-16 11:53:00
Dear,
I'm looking for a handheld PC running Windows (CE/Mobile) with a RS232
connection.
Or unless someone can inform me about whether a USB-to-RS232 device works on
these devices?
Thank you,
- Joris
...i2c/rs232 converter
Raphael - 2004-01-30 17:18:00
Does anyone know of a way to put an rs232 ascii data stream onto an
i2c bus as a slave device.
For example, I have an i2c bus which has a master already. I need to
give this master the data which is coming from an rs232 device, the
problem is that all the rs232 to i2c converters I've seen are ...GSM cell phone with RS232 data interface ??
2009-03-04 10:41:00
Does anyone know of a modern GSM phone which still has an RS232
data cable available for it ? (Most have gone to USB .. I want to send
SMS
messages from my embedded device which only has a RS232 port)
Thanks,
Stuart
...LIN and RS232
Jones - 2006-12-09 13:03:00
I have an embedded target I am trying to program (MC9S08DZ60
microcontroller) that has the SCI pins connected to a TJA1020T LIN
transceiver with single-wire output.
My question is, can I connect this single-wire LIN directly to a pin
(or pins) of the RS232 port on the back of an old DOS PC, ...Re: anyone heard of AccessProgrammer ?
Alaric B Snell - 2004-02-23 15:34:00
me wrote:
> Can't get it to talk to the PC via the serial port tried post of the common
> baud,parity, stop bit and handshake options in Hyperterm), the unit goes
> through a rather attractive self test on power up so if nothing else I have
> a heavyweight Christmas decoration.
Can you ...I need 1 USB to many RS232 Convertor?
=?ISO-8859-1?B?9m1lcmthcmFr/Of8aw==?= - 2008-08-06 15:35:00
I've an embedded system with Linux running on an ARM9 MCU and i need
to design an interface card to communicate with cards like 7816 smart
cards. I can only use USB interface of the system and i can
communicate with cards via rs232 protocol. do you have any idea to
convert USB port of this sytem...need TCP/IP, USB, and RS232 snooper
kathy - 2007-04-16 14:44:00
Could anyone tell me where I can find free software for monitoring the
TCP/IP, USB, and RS232 data traffic?
...tms470
Don - 2006-10-15 21:54:00
Hi,
I am currently attempting to use the DMA channels in the TMS470 (arm7dtmi
core product from TI). I can't seem to get it working quite right. Here is
what I'm trying to do.
1. Set up a simple array of chars 'a', 'b' through 'e'
2. Write these
chars to the SCI port (RS232) via a memory-...RS232 Voltage Levels
Charles Jean - 2006-01-05 18:09:00
I've got a datasheet for a chip that takes an RS232 serial input with
a protocol of 9600,N,8,1. It indicates the voltage level at this
input is hardware-selectable to either +/- 12V(as found from a PC
serial port), and either normal or inverted TTL level(0-5V). I plan on
feeding this chip a TTL...RS-485 Troubleshooting
RahulS - 2006-01-25 06:02:00
Hi,
I am using Rabbit development board which has separate ports for RS232
and Rs485. Right now i am using a single port both as RS232 as well as
RS485.
The port works fine for RS232 signals but for RS485 signals, the
differential output is not proper.I think there is some problem with
the dif...Four RS232 ports on PIC
Miem - 2006-09-23 00:12:00
Hi,
I want to ask expert advise how can I create four RS232 interface on a
PIC microcontroller?
(I'm planning to use PIC18F6680)
Thanks,
Miem Chan
miemchan at gmail . com
...Live Video Feed over one RS232 line (Rx or Tx)
GregNash - 2009-07-03 10:37:00
Hi all,
I have an idea to try and transmit live video camera data over one RS232
(either Tx or Rx) line. The problem is that I don’t know how to go about
processing the camera data. If the camera data was transmitted over an i2c
bus, then this would be possible (as per
http://www.gedanken.demon.c...Wanted: Linux embedded module w/ RS232 and ethernet
Udo Giacomozzi - 2004-09-29 05:23:00
Hello everybody,
can somebody suggest me a embedded linux module with RS232 and Ethernet
interfaces? Not much more is needed.
The RS232 interace is used to attach a GPRS modem module.
I want to use one of the following configurations:
1 - FTP server for the ethernet side, upload then ...how to extract +12V from RS232
Marcellus Pereira - 2004-04-27 16:08:00
Dear ALL,
I'm trying to use the ADuM1301 to isolate my embedded system from the
PC.
How can I extract +12V from RS232 DB9? With two diodes? But in what
pins?
Thanx,
Marcellus
...PIC/AVR PWM + RS232 simultaneously?
2008-08-06 17:36:00
Are there any sub 10 USD AVR or PIC uC that can do hardware PWM at the same
time as hardware RS232 ..?
The source of my question is that I suspect that same timer is used both for
bitrate generation and for PWM frequency+duty cycle.
...RS232 to Flash logger
Don - 2005-05-25 22:45:00
Hi All,
Anyone know of a readily available commercial product which can log
RS232 data & store it on a removable flash card i.e.. SD /MMC/ XD etc.
The instrument will be writing ASCII CSV strings.
I have a cct etc for an AVR but I need to buy a few in a hurry & just
have it work.
Chee...Re: i2c chip connected through USB port / Serial converter ttyUSB0 --Linux 2.6.17
Matthias Melcher - 2006-11-08 03:07:00
Antoine wrote:
> I am trying to communicate with an i2c board that is connected to my PC
> through USB. The serial converter works and the PC detects the device
> /dev/ttyUSB0.
> Is there a driver to communicate through the serial port to the i2c
> chip?
You can not connect an i2c devi...Problems interfacing PIC UART to PC Serial Port
zerang shah - 2004-03-10 20:02:00
Hello,
I am working on a design that requires interfacing a PIC
microcontroller to the rs232 serial port of a PC. I am using the UART
of the PIC16F628 but I am having problems: I can not get my PC to
recognize the serial data sent by my PIC.
For testing purposes I hooked up a palm pilot to ...are there reasons why to use SLIP in these days?
jazzisnow - 2005-02-20 03:30:00
hi all
i am dealing with a company that should develop a box for me. the box
should replace an existing box that is connected via rs232 to a pc.
now i have asked them to (instead of going to usb) make a proposal for
using ethernet instead of rs232.
upfront i described what i have in min...usb to serial port adapter
Nottingham - 2005-09-09 13:19:00
Has anyone seen a device that allows older serial ports only computers to
use USB devices?
I can only find RS232 to USB adapters turning USB ports to RS232. I need
the other way around and to work on NT.
...bluetooth->RS232
2005-01-24 17:37:00
My company makes an embedded device which normally is controlled by a
wintel host via RS232. The communication method is 8-bit binary, packet
based, with no hardware flow-control (3-wire interface).
I now have a new requirement: My device must communicate with a
bluetooth enabled wireless host...Please suggest USB to RS232 adapter that works 100%
=?ISO-8859-1?Q?Tom=E1s_=D3_h=C9ilidhe?= - 2008-06-12 20:39:00
I've purchased one already made by "Cypress Semiconductor" but it
doesn't work. The VID is 04b4 and the PID is 5500.
Can anyone suggest a USB to RS232 adapter that does its job perfectly
100% of the time under Microsoft Windows, i.e. it trully behaves
exactly just like any other serial port?...Re: RS485 - MODBUS or PROFIBUS or ....
Rich Webb - 2009-07-22 11:54:00
On Wed, 22 Jul 2009 07:28:08 -0700, Rumpelstiltskin
wrote:
> Grant Edwards wrote:
> > On 2009-07-22, Rumpelstiltskin wrote:
> >
> > > Since distance is only 4 feet, simplest way is to make a TTL
> > > level RS232 wire-or'd bus.
> >
> > Since "TTL level" and "RS232" are mutual...6802 - RS232
2006-06-08 03:18:00
hi everyone,
I am working on a project which has a 6802 processor and standard ram
and eeprom (not decided which bands yet). I wonder If I can write
sofware for 6802 in PC and can send it with rs232 port to eeprom.
...Re: USB Breakout
linnix - 2008-02-15 19:38:00
On Feb 15, 2:24 pm, Mark Borgerson wrote:
> In article @p43g2000hsc.googlegroups.com> , cbarn24...@aol.com says...
>
> > On Feb 13, 5:30=EF=BF=3D3Fpm, "}{" wrote:=
> > > I am planning a project and would appreciate any guidance you guys cou=
ld
> > > give.
>
> > > At...RS232/485 impromptu survey.
Not Really Me - 2005-09-19 13:47:00
How popular is that old standby async/sync serial data in new embedded
designs?
I know there are lots of other technologies coming into play from ethernet
to wireless, USB, etc., but what percentage of your new designs are using
RS232 or RS485?
I still see it on almost every project. If n...Using USB instead of RS232 on embeded project
Art K6KFH - 2004-09-23 08:49:00
I am developing a product that requires a serial port to transfer a
few bytes of data to a host pc on a repetitive basis. Currently using
115kbaud on an RS232 port on my board and that works fine. A little
slower is ok too. Some feedback has indicated that a USB port would
be an attractive al...Processor Clock speed change abd RS232
2006-05-05 06:51:00
I am looking for a microcontroller with UART that will run at 1Mhz
normally and 8Mhz when more power is available. My problem is the
receive on the RS232 when changing the processor clock speed. I think
this will cause an upset in any receive characters coming in at the
change over. Has any body...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....recommendation for 8 port rs232 embedded micro
Anchor - 2005-06-04 19:57:00
We are looking for recommendations for an 8 port rs232 embedded micro.
The CPU processing requirement is minimal.
Any suggestions?
...8 output pins to RS232 UART/USB
Niek - 2004-10-29 08:43:00
Hello,
Does somebody know if there is a chip with 8 input ports to send 1 byte
parallel and then automatically sends the byte out by USB (first choice) or
by RS232??
My problem is that I need 3 com-ports on my microcontroller and my processor
(zilog Z8S180) only has 2!!! I have an 1 byte ou...Re: RS232 Full Duplex to Half Duplex
Neil Cherry - 2005-03-26 14:21:00
On Fri, 25 Mar 2005 17:46:24 -0000, Grant Edwards wrote:
> On 2005-03-25, Neil Cherry wrote:
>
> > > Half duplex means that only one side transmits at a time. Half
> > > duplex RS-232 links don't use just 1 wire. They use the 2 data
> > > lines plus usually use RTS and CTS to control...Re: RS232 Development Board
Vladimir Vassilevsky - 2007-09-18 23:05:00
"ratemonotonic" wrote in message
news:1190143739.528133.230640@y42g2000hsy.googlegroups.com...
> On Sep 18, 5:57 pm, pbr...@netburner.com wrote:
> Just to answer some ppl confused by the requirement for 3 RS232 - it
> will be used to switch between three types of modems in a small
> ...MyBlueRoom.com is now www.BlueRoomElectronics.com
William at MyBlueRoom - 2006-07-22 11:49:00
If you're looking for the schematics on www.myblueroom.com Inchworm
ICD2 & Cricket Thermostat. I've had to move domains and transferring
was a royal pain.
I've not updated the site though, I want to put the PCB layout for the
ICD2 compatable (easy to build and very basic VDD 5V and VPP ~12.5
...USB<->RS232 converter cable recommendations.
Brian Murtha - 2004-06-15 20:55:00
Has anyone torture tested USB RS232 converter cables lately? The
ones Dontronics sells with the FTDI chipset have been working great
for us, but they raised the price through the roof.
We need one that supports DSR and DTR signals, works on all Windows
OS's except NT & 95, handles 460,800 bau...RS232 or USB to RS485
QBA - 2004-02-10 23:14:00
I need RS232 to RS485 converter or USB to RS485 converter, are there vendors
out there you recommend for these converters? More specifically, RS485 I am
using is 2-wire (ground, don't need 4-wire version) at 19200 baudrate.
...Low power USB Microcontroller
2007-07-10 10:11:00
I wonder if anyone can help, I am looking for a USB Microcontroller
with the following specifications
USB+USART+SPI , possibly not need SPI
USB slow or fast, RS232-300-19200 baud min, prefer upto 115200.
When the USB is in suspend or not connected Microcontroller needs to
run at low speed suc...Has anybody tried using Lauterbach's TRACE32 Simulator?
marL - 2008-10-17 21:39:00
Hi guys.
I'm doing some investigation regarding TRACE32 Simulator. I'll be
simulating a board with a PowerPC chip installed running in pSOS.
When using the board, I simply connect it through RS232 to my PC. To test
it, I use the Hyperterminal in Windows. But what I want is, instead of
using the...