Il 11-Nov-97, Rick Dickinson scrisse:

> unit, that could be accessed using some simple serial protocol.  I envision
> this "Serial Sonar Unit" (SSU) being a small PIC-based PC board, with
> connections to a pair of Murata 40 KHz transducers like the ones sold by All
> Electronics for $2.50 a pair.

I'm really interested...

>Details to be ironed out include:
>  -  Protocol for commands, including mode changes
>  -  Data format for measurement data returned
>       Inches?

better using cm.

>  -  I2C, SPI, or none of the above

I2c would be fine...

>  -  Baud rate/clocking (async 9600/4800/2400/1200? Autobaud? Sync?)

Fixed, say at 9600...

>  -  Distribution mechanism
>       PIC code/Schematics/PCB layout on web for download?
>       Preprogrammed PICs and etched PCBs for purchase?
>       Both?

In my opinion it should first come out in the first version (i.e. on web) and
then,
 if needed in the second...


--

   - *Alex* -

      (azummo@ita.flashnet.it)