Hi Jim,
My team and I will like to have the transfer rate up to 1Mbps. Since we are
transferring a large amount of data and we are deploying this project on a
remote island, therefore power consumption is a issue. That is why I am
planning to get a serial to USB converter
--- In Jim Jackson <> wrote:
>
>
>
>
> On Wed, 17 Feb 2010, tsao.terence wrote:
>
> > 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.
>
> Myself, I'd get over the hang up of working uart at some rediculous speed,
> hook up a max232 to the card to give a proper rs232, and hook it up to one
> of the TS board's rs232 ports. It'll work at 115200 baud.
>
> > --- In Jim Jackson <jj@> 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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