[Tinyos-help] Connecting Tmotes by I2C bus

[Matteo Andretto]

I have observed that after boot sequence in slave mote the value in
register I2C0A is 0x18, this is the slave address. I cannot change
it using command I2CSlave.listen(OUR_ADDR) of component Msp430I2CP,
modified by Steve, or directly HplMsp430I2C.setOwnAddress(OUR_ADDR) of
component HplMsp430I2C0P.

Another strange thing is that slave mote does not answer with an
acknowledge neither if master calls it with address 0x18.

I am bewildered

Matteo



Quoting Matteo Andretto <andretto at dei.unipd.it>:

> Hi,
>           I would connect 2 Tmote Sky by I2C bus in TinyOS 2, one as master
> and the other as slave, but I have some problems.
> Master mote starts write operation, it sends slave address on bus, but
> slave mote does not answer with acknowledge signal.
> I have programmed slave mote with code suggested by Steve McKown in this post
>
> http://tinyurl.com/ynyqhk
>
> It seems slave mote doesn't recognize its address, but I have checked
> and it is correct in SlaveI2CConfC.nc
>
> Has Anyboy suggests?