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<p>I'm doing an I2C slave RTC DS1374 emulation on a CortexM0+
Kinetis K27Z, and there is tight time constraints in responding to
the master request that need to be close to the device BSP. The
master of the I2C is the BeagleBoneBlack linux. So I did chew on
whether Nuttx would be valuable as part of that, so interesting
to hear the discussion. <br>
</p>
<p> I prototyped the I2C slave drivers responding to the BBB, and as
that is core requirement building the rest of the system round it
- which really means just not turning off those interrupts at any
time.<br>
</p>
<pre class="moz-signature" cols="72">Neil Hancock</pre>
<div class="moz-cite-prefix">On 2/7/2018 9:08 AM, Alan Carvalho de
Assis <a class="moz-txt-link-abbreviated" href="mailto:***@gmail.com">***@gmail.com</a> [nuttx] wrote:<br>
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<p>I think an I2C Slave driver on NuttX could be useful to
enable a<br>
console over I2C on microcontrollers that doesn't have
UART or where<br>
all UARTs are in use.<br>
<br>
The Silicon Labs CP2112 could be in this case to read the
data on computer.<br>
<br>
Just a crazy idea, but I think it could be feasible.<br>
<br>
On 2/7/18, <a class="moz-txt-link-abbreviated" href="mailto:***@yahoo.com">***@yahoo.com</a> [nuttx] <a class="moz-txt-link-rfc2396E" href="mailto:***@yahoogroups.com"><***@yahoogroups.com></a> wrote:<br>
><br>
> > All common drivers must also be 100% independent
of the CPU architecture.<br>
> Using an upper/lower driver model solves both of
these issues and so it<br>
> common in the drivers incorporated into the
repository.<br>
><br>
><br>
> Not really true. Let me clarify: The drivers under
the drivers/ directory<br>
> must be independent of CPU-specific hardware. If you
have some<br>
> board-specific, unique device that needs to use the
CPU-specific I2C slave<br>
> interface, then that driver could be provided just
find in the<br>
> configs/<board>/src directory. That is wholly
appropriate.<br>
><br>
><br>
><br>
><br>
><br>
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