if you want to broadcast to a group of devices, simply give them
identical addresses.
if these are simple devices like parallel ports, this is no problem, as
they always give you an ack, so you don't need to detect it.
but make sure, you never read from such a group, as you will only read
bullshit.
tino

>-----Original Message-----
>From: Lucian Copat [mailto:luciffer@home.ro]
>Sent: Monday, October 25, 2004 2:20 PM
>To: Microcontroller discussion list - Public.
>Subject: [PIC] I2C Broadcast Question
>
>Hello to all readers !
>
>I have a simple question for the more documented of you: I would like
to
>have more devices on a I2C bus and broadcast to a specific group of
them.
>The architecture will be one master/many slaves. Is it possible to
assign
>addresses to them so to be able to broadcast only to a specific address
>range ? E.g.: to broadcast to 0101XXX0 where XXX would be all devices
>within
>this range ?
>
>Thank you in advance for your answers.
>
>Lucian
>
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