Hi,
I have connected in such manner (null modem adapter, gender changer,
usb-to-serial adapter) and was able to communicate with my TS-7250
board properly until quite recently. The gender changer is used b/c
the gender of my usb-to-serial adapter and the output of the null
modem adapter don't match each other.
Sincerely,
Stanley Lee
--- In Jim Jackson <> wrote:
>
>
>
>
> On Tue, 13 Feb 2007, prak75_2004 wrote:
>
> > Hi Tech77man,
> >
> > I have connected COM1 of the TS-7250 board to my laptop using a null
> > modem adapter, followed by a gender changer,
>
> This is ringing alarm bells - you shouldn't need a gender changer
> if the null-modem cable really is a null-modem cable!
>
> I suspect you have an ordinary modem cable - with straight thru' pin
> connections. A Null-Modem cable is a Special cable with pin connections
> Crossed, as people have mentioned here.
>
>
> > and usb-to-serial
> > connector to my laptop to the correct COM port.
> > The settings of Hyperterminal is set to operate at a baud rate of
> > 115200, with 8N1 and None for Flow control on the correct COM port, as
> > instructed in the manual.
> >
> > Regards,
> >
> > Stanley Lee
> >
> > --- In "Jesse" <jessenewton@> wrote:
> > >
> > > Okay, the only things I see that you have not clarified in your
> > > message is the type of cable (1) it should be a null modem
> > > cable to Com1 connector, which means that the hardware control
> > > signals are connected to each other at pins 4 to 6 and 7 to 8,
> > > by doing so, tx and rx are enabled and not blocked. (2) is the
> > > settings of Hyperterm, it should be set to whatever Com port
> > > that you are physically connected to, with 8N1 and None for
> > > Flow control. If all of that is in place, a power-up on the
> > > TS-7250 board, or pushing the reset button, should allow you
> > > to see the bootup messages.
> > >
> > > //Tech77man
> > >
> > > --- In "prak75_2004" <stanigator@> wrote:
> > > >
> > > > Hi,
> > > >
> > > > I have trouble seeing redboot messages of my TS-7250 board. I have
> > > > jumpers 2 and 3 connected, and the power lights are on. I have
> > > trouble
> > > > communicating between the host computer and the microcontroller
> > > using
> > > > Hyperterminal in Windows through using a usb-to-serial converter.
> > > > We've checked the usb-to-serial converter using the feedback test,
> > > and
> > > > we've made sure that the transmit/receive pins at the
> > > microcontroller
> > > > and the usb-to-serial cable end are connected properly. I'm not
> > > sure
> > > > what else to check to see whether the board is working or not. Can
> > > > someone give me some suggestions?
> > > >
> > > > Thanks,
> > > >
> > > > Stanley Lee
> > > >
> > >
> >
> >
> >
>
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