Hi Jim,
The radio card currently does not support SPI, but can I use SDIO to
interface with the radio card? I haven't done much research on the SDIO yet.
Thanks!
--- In Jim Jackson <> wrote:
>
>
>
>
> On Wed, 17 Feb 2010, tsao.terence wrote:
>
> > Here is the radio card:
> > http://www.rovingnetworks.com/wifly-gsx.php
> > Let me know what you think!
>
> from the features....
>
> Host data rate up to 4Mbps for SDIO and SPI and 921K over UART
> ^^^^
>
> This figure is more cluefull. Baud rates are seldom nice round figures.
> Can't remember what TS board you are using, but some have raw UART serial
> comms which will just hook up (though the radio card is 3.3V so
> you may need to watch voltage matching).
>
> To convert rs232 voltage levels to 3.3v/5v UART probably only needs a
> couple of transistor inverters. UART serial is 0-3.3V (or 0-5v) and
> the data bits are the inverse of the RS232 levels.
>
> As an alternative you may want to investigate using SPI to connect.
> Though I'm not sure what the SPI max would be for the TS boards.
>
>
> >
> > Thanks Jim.
> >
> > --- In Jim Jackson <jj@> wrote:
> >>
> >>
> >>
> >>
> >> On Tue, 16 Feb 2010, tsao.terence wrote:
> >>
> >>> Hi Jim,
> >>>
> >>> I read the data sheet of the Radio card, it is uart interface, which
> >>> supports up to 1000000 baud rate. That is why I am trying to figure out
> >> ^^^^^^^^^^^^^
> >>
> >> This makes me very suspicious! What is the product - have you a web site
> >> ref for the radio card?
> >>
> >>> a solution because the maximum baudrate for TS7260 is 230K. I will like
> >>> to use a USB to serial board like this:
> >>
> >>> http://www.sparkfun.com/commerce/product_info.php?products_id=718
> >>>
> >>> What do you think?
> >>>
> >>> Thanks
> >>>
> >>> --- In Jim Jackson <jj@> wrote:
> >>>>
> >>>>
> >>>> Sorry but your whole query is pretty non-sensical...
> >>>>
> >>>> On Sun, 14 Feb 2010, tsao.terence wrote:
> >>>>
> >>>>> I have a 2.4Ghz radio card that supports up to 1Mbps transfer rate
> >>>>> with
> >>>>> uart interface. Therefore I am trying to hack the TS7260 uart to have
> >>>>> the baudrate of 1000000. The only reason they quote maximum baudrate is
> >>>>> only 230K is because the limitation of the RS232 chip on board.
> >>>>
> >>>> What interface does your radio card present for connection to the host
> >>>> computer? The documentation (you know that stuff that nobody seems to
> >>>> read
> >>>> :-) for the radio card should be specific.
> >>>>
> >>>> If it is an rs232-type serial interface, it should say something like
> >>>> rs232
> >>>> at TTL levels, like TS describe some of their "rs232" interfaces.
> >>>> They should also specify the EXACT baud rate at which they drive this
> >>>> interface - you have to match this EXACT baud rate on the TS board side.
> >>>> They should also say how many data bits, whether or not they use parity
> >>>> etc.
> >>>>
> >>>> If they don't give this info, then start to suspect that it is not an
> >>>> rs232
> >>>> type interface - there are many other types of serial interface e.g. i2c,
> >>>> spi and these are driven in an entirely different way.
> >>>>
> >>>>>
> >>>>> Therefore I will like to bypass the RS232 level, but I don't know if
> >>>>> you can actually do that.
> >>>>>
> >>>>> 1.) Can I set the uart to a different set of pins therefore it doesn't
> >>>>> go though the RS232 chip and it won't have baud rate limitation issue?
> >>>>>
> >>>>> 2.) Get a USB to serial converter, but I don't really like that idea,
> >>>>> I want to use just the board itself.
> >>>>>
> >>>>> 3.) What else can I do to upscale the baudrate to 1000000 without
> >>>>> having to distort the signal.
> >>>>>
> >>>>> Remember I want UART not RS232
> >>>>>
> >>>>> Thanks
> >>>>>
> >>>>>
> >>>>
> >>>
> >>>
> >>>
> >>
> >
> >
> >
>
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