Re: Rosetta progress report WAS: translator question

[nobody@xxxxxxxxxxxx (Dave Houston)]

It will be interesting to learn the price.

"BruceR" <br@xxxxxxxxxxxxxxxx> wrote:

>Sounds excellent! BTW, I received and email from smartproducts
>announcing their Zwave/X10 translator today:
> http://www.smartproducts.us/Zwave.htm  scroll down.
>
>From:Dave Houston
>nobody@xxxxxxxxxxxx
>
>> I have a circuit board layout that I think will work. I'll stare at
>> it for a few more days. I usually find that causes traces and solder
>> pads to move around mysteriously ending up in locations where I don't
>> recall placing them. I'll send it off this weekend and should have it
>> about 2-3 weeks after that. In the meantime I can start on the code
>> using a BX24-AHT board
>>
>> Mouser does not stock any through hole RTC chips so I will use SMT
>> and will forget about using any of the supported serial devices for
>> the RTC backup. This will save a bit of code since there will only be
>> the one chip to interface with. I'll leave the choice of
>> supercapacitor to the user. Mouser stocks 3 that will fit the space
>> I've alloted. They will provide anywhere from 2-3 days to more than a
>> month backup for the RTC chip.
>>
>> I've settled on I²C for the RTC chip and will use the ZX-24's
>> hardware I²C implementation which can run at 410kHz. The I²C bus can
>> support another EEPROM chip should it prove necessary to increase the
>> space for user data.
>>
>> To use Rosetta with any of the controllers that normally use a TW523
>> (or PL513), the newly liberated TW523 (or PL513) will need to be
>> attached to the other TTL port in order to supply a ZC signal for
>> Rosetta and the controller (e.g. HAI, JDS, Ocelot). The controller,
>> Rosetta and TW523 (or PL513) will share the ZC signal. I think the
>> ZX-24 will be fast enough to have the controller receive pin follow
>> the ZX-24 receive pin which will be listening to the TW523. This way,
>> there will be no delay in the controller receiving what's on the
>> powerline (or at least what the TW523 is willing to divulge on that
>> topic). When the controller transmits, there will be a delay as
>> Rosetta will need to see a complete code before deciding if it needs
>> translation or merely needs to be sent to the powerline via the TW523
>> (or PL513). This should allow for sending/receiving a mixture of
>> X-10, UPB and 2414S powerline commands
>>
>> Rosetta will also be able to program delays (~2ms minimum, infinite
>> maximum resolution) as needed between signals it sends to the
>> powerline.
>