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Discussion Groups | Rabbit-Semi | RIO as SPI hub?
This is a group for folks designing and programming embedded systems using the Rabbit Semiconductor C-programmable microcontroller. Rabbit Semi is a spin-off from Z-World who makes a variety of embedded modules and tools. This group is not affiliated with either Rabbit or Z-World, but is a user forum for sharing ideas, asking questions, flaunting knowledge, and other typical user group stuff. The Rabbit is a powerful uC, supported by a full-featured C-compiler.
RIO as SPI hub? - fairy_dave - May 12 19:30:59 2009
Hi all,
I've been reading the documentation for the RIO chip and been doing some thinking. It looks like the RIO in RabbitNet hub mode can be used as a SPI hub by doing the following:
1. Enable chip select
2. Send address command byte
3. Read/write with the destination chip as if it were a direct connection
4. Disable chip select
Is there anything I'm missing in my reading here? Because if the RIO can be used like this it becomes a very useful little chip for me.
Cheers,
Dave
------------------------------------
(You need to be a member of rabbit-semi -- send a blank email to rabbit-semi-subscribe@yahoogroups.com )
I've been reading the documentation for the RIO chip and been doing some thinking. It looks like the RIO in RabbitNet hub mode can be used as a SPI hub by doing the following:
1. Enable chip select
2. Send address command byte
3. Read/write with the destination chip as if it were a direct connection
4. Disable chip select
Is there anything I'm missing in my reading here? Because if the RIO can be used like this it becomes a very useful little chip for me.
Cheers,
Dave
------------------------------------
(You need to be a member of rabbit-semi -- send a blank email to rabbit-semi-subscribe@yahoogroups.com )
Re: RIO as SPI hub? - lwoodzw - May 15 12:18:33 2009
Dave-
You are correct; in RabbitNet hub mode the RIO can be used exactly as you described. It's obviously an important feature for RabbitNet, but not many people realize that it can be generalized to any SPI interface...
-Lynn
--- In r...@yahoogroups.com, "fairy_dave" wrote:
>
> Hi all,
>
> I've been reading the documentation for the RIO chip and been doing some thinking. It looks like the RIO in RabbitNet hub mode can be used as a SPI hub by doing the following:
>
> 1. Enable chip select
> 2. Send address command byte
> 3. Read/write with the destination chip as if it were a direct connection
> 4. Disable chip select
>
> Is there anything I'm missing in my reading here? Because if the RIO can be used like this it becomes a very useful little chip for me.
>
> Cheers,
> Dave
>
------------------------------------
(You need to be a member of rabbit-semi -- send a blank email to rabbit-semi-subscribe@yahoogroups.com )
You are correct; in RabbitNet hub mode the RIO can be used exactly as you described. It's obviously an important feature for RabbitNet, but not many people realize that it can be generalized to any SPI interface...
-Lynn
--- In r...@yahoogroups.com, "fairy_dave"
>
> Hi all,
>
> I've been reading the documentation for the RIO chip and been doing some thinking. It looks like the RIO in RabbitNet hub mode can be used as a SPI hub by doing the following:
>
> 1. Enable chip select
> 2. Send address command byte
> 3. Read/write with the destination chip as if it were a direct connection
> 4. Disable chip select
>
> Is there anything I'm missing in my reading here? Because if the RIO can be used like this it becomes a very useful little chip for me.
>
> Cheers,
> Dave
>
------------------------------------
(You need to be a member of rabbit-semi -- send a blank email to rabbit-semi-subscribe@yahoogroups.com )
Re: RIO as SPI hub? - fairy_dave - May 16 2:15:49 2009
That's good to hear. Naturally it's not the way that SPI is designed to work but that
implementation does have its advantages in some designs.
Cheers
--- In r...@yahoogroups.com, "lwoodzw" wrote:
>
> Dave-
>
> You are correct; in RabbitNet hub mode the RIO can be used exactly as you described. It's obviously an important feature for RabbitNet, but not many people realize that it can be generalized to any SPI interface...
>
> -Lynn
------------------------------------
(You need to be a member of rabbit-semi -- send a blank email to rabbit-semi-subscribe@yahoogroups.com )
Cheers
--- In r...@yahoogroups.com, "lwoodzw"
>
> Dave-
>
> You are correct; in RabbitNet hub mode the RIO can be used exactly as you described. It's obviously an important feature for RabbitNet, but not many people realize that it can be generalized to any SPI interface...
>
> -Lynn
------------------------------------
(You need to be a member of rabbit-semi -- send a blank email to rabbit-semi-subscribe@yahoogroups.com )