Hi Eric,
Thanks for all that and sorry yes I'm using the em-cc430f5137-900 development
board from TI, I need the driver quite urgent, to a point where I've started to
develop a driver myself but I'm now going to stop if there is a working/semi
working driver in the trunk you've listed below, I got my source code from the
OSIAN git rep and it doesn't have the MSP430X in it, is it fare to say the
google rep is more up to date in terms of development work?.
Regards
Derek
From: Eric Decker [mailto:cire...@gmail.com]
Sent: 18 May 2011 10:52
To: Derek Baker
Cc: tinyos-help@millennium.berkeley.edu
Subject: Re: [Tinyos-help] Uart v Usci
Hi Derek,
I'm currently working on integrating the msp430 core code for the three major
msp430 families (the x1, x2, and x5).
You are using an x5 part. I'm guessing the cc430f5137 because I beleive you
are basing off of the osian/surf board code.
When you post question onto tinyos-help (or for that matter anywhere) it would
be helpful if you included the specifics of exactly what you are working with
so we don't have to guess.
That also applies to what flavor of em430 board you are using. TI makes many
different eval boards for their processors. For example, I have an eval board
for the 5438 that is significantly different from the eval board that the surf
folks called the em430. So calling it the em430 doesn't convey alot of
information.
On Wed, May 18, 2011 at 2:14 AM, Derek Baker
<derek.ba...@claritas-solutions.com><mailto:derek.ba...@claritas-solutions.com>>
wrote:
Hi, can anybody explain to me the difference between the msp430/usci and
msp430/uart drivers,
The devil is in the details. I think you are talking about
tos/chips/msp430/usart vs. tos/chips/msp430/usci.
The usart driver (tos/chips/msp430/usart) is the driver for the x1 family
peripheral (the USART). On the x2 and x5 family parts there is a different
peripheral called the USCI. It is a different beast and has a different
driver. There are basically differnt flavors of what these modules do. The
USART on the x1 parts only has I2C on port 0 and this is reflected in the code.
The USCI situation is also convoluted. The X2 implementation of USCI vs. the
x5 implementation has some significant warts. In particular how interrupts are
dealt with and where the register are mapped and how they are accessed.
I noticed the /msp430/uart has i2c support. I'm using the em430 mote which is
configured to use the usci but I need the i2c part has anybody developed the
i2c part of the /msp/usci?
Peter who did the initial support for the tinyos cc430f5137 port didn't add the
i2c functionality because he didn't have any h/w that used it. The parts will
support it. But the driver hasn't been integrated yet.
i'm pretty sure that the Z1 folks have a working i2c driver. Keep in mind
that all of this code is in flux. The code that is currently in the trunk for
the msp430X (tos/chips/msp430X) is being heavily reworked. That said there is
a version of the usci drivers in there that worked for the Z1 folks. But it
is very ugly and unfinished. A more modern driver is being worked on in the
msp430 integration branch. That is also where the merged x5 code is coming in.
How soon do you need an i2c driver?
Regards
Derek
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Eric B. Decker
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