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 <> 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
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>>
>>
>
>
>
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|