Implementation of RS-232 Standard

Started by Amit Kumat Malik April 28, 2005
Hello,
Any body had implemented the RS-232 / EIA-232 standard on ATMega128,
with fullflow control.

I need to have the various signal timing to implement a full flow
control RS-232 port. or RS232 standard explaning the timing.
RTS,CTS,RI,DSR,DTR,TD,RD.

Regards,
Amit Kumar Malik



RS232 is only a standard for the voltage levels at the link layer. The use
of some control signals are defined in the context of DTE/DCE in a modem
world, but the details of how these are used and the timing is not in the
standard. -----Original Message-----
From: avrclub@avrc... [mailto:avrclub@avrc...] On Behalf Of
Amit Kumat Malik
Sent: Thursday, April 28, 2005 4:38 AM
To: avrclub@avrc...
Subject: [AVR club] Implementation of RS-232 Standard

Hello,
Any body had implemented the RS-232 / EIA-232 standard on ATMega128,
with fullflow control.

I need to have the various signal timing to implement a full flow
control RS-232 port. or RS232 standard explaning the timing.
RTS,CTS,RI,DSR,DTR,TD,RD.

Regards,
Amit Kumar Malik
Yahoo! Groups Links



the full flow control needs all the 9 pin or 25 pins to be used in a
way so that the DTE /DCE terminal can act simultaniously. in case of
controllers we only have TD/RD we have to make some PIO to work as
DCE/DTE/DSR/DCD/RI etc.
I am looking for the specifications telling who to use them to
develop Full flow control communication where DTE/DCE act
simultainously.

regards,
amit kumar malik

--- In avrclub@avrc..., "stevech" <stevech@s...> wrote:
> RS232 is only a standard for the voltage levels at the link layer.
The use
> of some control signals are defined in the context of DTE/DCE in a
modem
> world, but the details of how these are used and the timing is not
in the
> standard. > -----Original Message-----
> From: avrclub@avrc... [mailto:avrclub@avrc...] On
Behalf Of
> Amit Kumat Malik
> Sent: Thursday, April 28, 2005 4:38 AM
> To: avrclub@avrc...
> Subject: [AVR club] Implementation of RS-232 Standard
>
> Hello,
> Any body had implemented the RS-232 / EIA-232 standard on ATMega128,
> with fullflow control.
>
> I need to have the various signal timing to implement a full flow
> control RS-232 port. or RS232 standard explaning the timing.
> RTS,CTS,RI,DSR,DTR,TD,RD.
>
> Regards,
> Amit Kumar Malik >
> Yahoo! Groups Links



Well, EIA RS232-c gives you half the answer. The rest isn't standardized.

-----Original Message-----
From: avrclub@avrc... [mailto:avrclub@avrc...] On Behalf Of
Amit Kumat Malik
Sent: Friday, April 29, 2005 1:58 AM
To: avrclub@avrc...
Subject: Re: [AVR club] Implementation of RS-232 Standard

the full flow control needs all the 9 pin or 25 pins to be used in a
way so that the DTE /DCE terminal can act simultaniously. in case of
controllers we only have TD/RD we have to make some PIO to work as
DCE/DTE/DSR/DCD/RI etc.
I am looking for the specifications telling who to use them to
develop Full flow control communication where DTE/DCE act
simultainously.

regards,
amit kumar malik

--- In avrclub@avrc..., "stevech" <stevech@s...> wrote:
> RS232 is only a standard for the voltage levels at the link layer.
The use
> of some control signals are defined in the context of DTE/DCE in a
modem
> world, but the details of how these are used and the timing is not
in the
> standard. > -----Original Message-----
> From: avrclub@avrc... [mailto:avrclub@avrc...] On
Behalf Of
> Amit Kumat Malik
> Sent: Thursday, April 28, 2005 4:38 AM
> To: avrclub@avrc...
> Subject: [AVR club] Implementation of RS-232 Standard
>
> Hello,
> Any body had implemented the RS-232 / EIA-232 standard on ATMega128,
> with fullflow control.
>
> I need to have the various signal timing to implement a full flow
> control RS-232 port. or RS232 standard explaning the timing.
> RTS,CTS,RI,DSR,DTR,TD,RD.
>
> Regards,
> Amit Kumar Malik >
> Yahoo! Groups Links
Yahoo! Groups Links



thats the only thing bugging me,
i can recieve data using flowcontrol, but in case of tx ig goes out as
soon as it is written in txbuffer(8bit).
amit

--- In avrclub@avrc..., "stevech" <stevech@s...> wrote:
> Well, EIA RS232-c gives you half the answer. The rest isn't
standardized.
>
> -----Original Message-----
> From: avrclub@avrc... [mailto:avrclub@avrc...] On
Behalf Of
> Amit Kumat Malik
> Sent: Friday, April 29, 2005 1:58 AM
> To: avrclub@avrc...
> Subject: Re: [AVR club] Implementation of RS-232 Standard
>
> the full flow control needs all the 9 pin or 25 pins to be used in a
> way so that the DTE /DCE terminal can act simultaniously. in case of
> controllers we only have TD/RD we have to make some PIO to work as
> DCE/DTE/DSR/DCD/RI etc.
> I am looking for the specifications telling who to use them to
> develop Full flow control communication where DTE/DCE act
> simultainously.
>
> regards,
> amit kumar malik
>
> --- In avrclub@avrc..., "stevech" <stevech@s...> wrote:
> > RS232 is only a standard for the voltage levels at the link layer.
> The use
> > of some control signals are defined in the context of DTE/DCE in a
> modem
> > world, but the details of how these are used and the timing is not
> in the
> > standard.
> >
> >
> > -----Original Message-----
> > From: avrclub@avrc... [mailto:avrclub@avrc...] On
> Behalf Of
> > Amit Kumat Malik
> > Sent: Thursday, April 28, 2005 4:38 AM
> > To: avrclub@avrc...
> > Subject: [AVR club] Implementation of RS-232 Standard
> >
> > Hello,
> > Any body had implemented the RS-232 / EIA-232 standard on ATMega128,
> > with fullflow control.
> >
> > I need to have the various signal timing to implement a full flow
> > control RS-232 port. or RS232 standard explaning the timing.
> > RTS,CTS,RI,DSR,DTR,TD,RD.
> >
> > Regards,
> > Amit Kumar Malik
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links >
> Yahoo! Groups Links