[Tinyos-help] I2C, TelosB and Tinyos 2.0

[Philip Levis]

On Aug 3, 2006, at 3:10 AM, Max CORTIANA wrote:

> Hi all
>
> I'm upgrading TinyOs to version 2.0, but i don't see any I2C  
> component for the TelosB platform while it is ready for other  
> platforms.
>
> TinyOs 1.x instead offers the I2CPacketC component, which i've used  
> for my applications.
>
> Is the I2C driver for TinyOs in a developing stage or have i missed  
> something?

There is an I2C driver in 2.x (written by Arch Rock), but it did not  
make it into the beta2. The MSP430 bus is about to go through its  
final iteration; the expectation is that I2C will be ready in a few  
days. The iteration is due to a requirement in the MSP430  
specification, that the USART must be in the reset state whenever it  
is reconfigured. This has some implications for the automatic power  
management. The I2C code will be on the -devel branch for a little  
while to make sure it is stable, etc. Then we'll move it over to the  
trunk branch.

Phil