Actually I bought another female to female null converter. So, if hook the
db9-to-usb converter and null converter together, it should be good as an null
modem cable, right? By the way, when you say type, does it mean type in the
minicom? But, I wasn't able to type anything in the minicom.
--- In Jason Stahls <> wrote:
>
> jiangcaoyang wrote:
> > Hi every:
> >
> > I need some help!
> >
> > Recently, I bought a serial-to-usb converter cable so that I can connect my
> > ts-7200 to my computer. Before actually power my board up, I did a test. I
> > hook up the converter to my linux ubuntu PC. The user guide said using
> > minicom as the communication tool. So, I followed all the instructions and
> > set port to /dev/ttyUSB0, baud rate to 9600, 8 data bits, no parity check,
> > 1 stop bit and no hardware or software control. (When I typed dmesg | tail.
> > The system says "pl2303 converter now attached to ttyUSB0". I assume system
> > have found the hardware and assign it to ttyUSB0?)
> >
> > However, after exiting from the minicom setup window and going to the main
> > windows, it says I am in offline status and I wasn't able to type anything
> > in the window. I only connected the USB end to my PC and leave the other
> > end(serial) unconnected. Is it because of this that I get offline status?
> > or I have wrong setups. How can I test whether the minicom is properly
> > configured and ready for communication?
>
> Ignore the offline bit, that only changes if one of the control lines
> goes high on the serial port and normally only ever changes if you're
> connected to a modem. As for the rest, to test the USB->Serial adapter
> jump pins 2 and 3 together, when you type it should echo back. It
> sounds like you have a straight-thru cable when you need a null/cross
> over cable.
>
> --
> Jason Stahls
>
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