Am Donnerstag, 9. Juni 2005 23:08 schrieb Scott Walde:
> >>Hi. I've been pretty quiet on this list so far, so I feel a bit awkward
> >>jumping in right here. Anyways, I have another suggestion for
> >>identifying aggregates. You can put an EPROM device such as the DS2505
> >>into each aggregate device and place information on that EPROM
> >>describing the components on that device.
> >
> > Hm. I don't see a big benefit over the unique IDs all devices have. You
> > still have to maintain a database of serial numbers. The crucial part is
> > to get the same label *into* the hardware and *onto* the hardware. I does
> > not matter which data is placed on the label, it just has to be unique.
>
> The advantage is with this method, you only need to recognize the
> DS2505. Once you read the data off the DS2505, you can use that
> information to logically cluster the rest of the devices.
>
> Perhaps I wasn't completely clear on my idea... When you build the
> aggregate device, the DS2505 would be programmed with the addresses
> (serial numbers) of each individual component in the aggregate device.
> Then, when you later discover a 2505 on the bus, you read the data out
> of it to obtain the list of addresses (serial numbers) of the individual
> components in that aggregate device. Now, the only serial number you
> need to know to identify the aggregate device is the serial number of
> the DS2505.
>
My idea is to recognize one single chip of the aggregate, too. Then look it up
in my database and still knowing which other chips are on the device in
question. That information was stored previously, when the module was hooked
to a 1-Wire-Bus solely. You have to do the same, as you don't know the chip
IDs beforehand.
Our ideas only differ in one thing: You want to put additional data about the
module into an additional chip on the module, I will put this information
onto the host's harddisk/flash.
Kind regards
Jan
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