Re: TI-H: Radio link.


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Re: TI-H: Radio link.




>This is the situation. When the link listening to no signal you always get a
>logical '0' out.

>From my message, "Then just send packets as fast as you can".  packets is
the key word.

>So your thing doesn't work so nice.

Ummm... Seems to work well for AUI at 10mbits.

>byte and then transmit it with in a more efficient way ex. RS-232. Why
>RS-232 then? Because it is hardware supported in the AVR risc
>microcontroller. You can't beat that with software in the link to link way.
>Thank you for your
>suggestion.

Alaways do packets with CRC or echo, alaways.  I don't think you understood
what I said anyway.

>
>
>At 02:26 1999-10-29 -0800, you wrote:
>>
>>Your bit status isn't clear.  Why not just designate bit 0 for pin 0 and
>>bit 1 for pin 1?  Then just transmit that as fast as you can in packets
>>with echo.
>>
>>Thats the best way to make sure all data gets where it needs to go without
>>errors.
>>
>>Grant
>>
>>>First I will say that the price was wrong. It should be $10 not $100.
>>>I'm sorry for that.
>>>
>>>I will have a small onechip computer for doing the transfer.
>>>The pin state I will send when any pin is low. Maybe this
>>>will take a lot of bits send in transmitting. Ex.
>>>000 pin 0 is low. 001 pin 1 is low. 010 pin 0 goes high and 011 pin
>>>1 goes high. It sending on a change in state of pins. When it's no
>>>change the link is in listening mode.
>>>This is not so effective as encodeing a protocol and send with RS-232.
>>>And if you send with RS-232 or some other homemade protocol you can do more
>>>advance faliure secure things.
>>>And I have thought of compressing the data also. If you for example send
>>>Z80 programs this is a really nice code to pack. But the first thing is
>>>to make the state of pin protocol work. It is really good if you people come
>>>with some ideas and so on.
>>>
>>>The radio link is on a swedish page. But I put the .pdf file on
>>>www.big.du.se/~pea
>>>
>>>It is a little tricky to make but the layout is in the pdf-file and
>>>that is a relief.
>>>
>>>/PEA
>>>
>>>
>>>
>>>
>>>At 13:02 1999-10-28 -0500, you wrote:
>>>>
>>>>From: Grant Stockly <gussie@stockly.com>
>>>>>>First I going to have a direct connection. The link looks just like a
>>>>cable
>>>>>>to the TI.
>>>>>>Then you should be able to switch a switch were the link can recognize
>>>>>>different protocols from TI ex. I2C. Between the links there will be
>>>>>>RS-232 maybe with some multi-user support. You have transfer rate of 9.6
>>>>Kbps.
>>>>>
>>>>>Why don't you save yourself and others time by just transmitting line
>>>>>level
>>>>>state over the radio?  Any protocol can be used (even RS232) and the thing
>>>>>would work great.
>>>>
>>>>Sounds like that is what the first mode was.  That would be the
>>>>prefered way
>>>>to do a radio link, since it then supports any protocol the software is
>>>>using.
>>>>
>>>>What I was really asking about was details on the protocol.  IE, how
>>>>are you
>>>>going to handle transmitting the state of the wires?
>>>>
>>>>I'm curious who produces the transceiver you are using, is there a web page
>>>>for it somewhere?
>>>>
>>>>DK
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>
>>
>>
>>



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