Hello, On Wed, Nov 30, 2011 at 1:20 PM, "Sebastian Dölker" <sebastiandoel...@gmx.de> wrote: > Hallo, > > unfortunately I wasn’t successfully in reading out the i2c_status.. > I successfully included the dbgmsg-components but on the pc-side > I can’t receive dbg-messages. > (I use blip‘s ipbasestation ..does it work together?)
If you haven't defined any DIAGMSG_ constant, it will send to the serial port. If you define DIAGMSG_RADIO, it will send through the radio with single hop broadcast (but I don't know if it will work blip together with blip). By the way: How do you use blip on iris? It's not supported yet (see the thread "IRIS support on current Blip Version") > If you want to reconstruct the i2c error you can manually pull > scl low for a long (ca. 2-3 sec) time, while you are reading out > an i2c sensor with a cycle time of 1 sec… > I think that will end in the same error state which occurs in > communication with the co2 sensor I’m using.. Ok, now I really don't understand the problem. In your first mail, you wrote both lines stayed high. It means that the bus is busy, and the driver returns E_BUSY, as it should, but after i2c_abort(), everything is working again. The problem is probably a failed communication, which the driver couldn't handle, and still waits for an answer from the slave. Now you say I should pull the SCL line low, and use the i2c bus. This means HOLD MASTER. This is a signal generated by the slave, becouse it isn't ready for communication. The driver should wait with the first job while the SCL is low (and sends EBUSY to any new request), and as soon as the SCL is released it should do the first job. Do you say that the i2c is still busy after releasing the SCL? > I think it doesn’t make sense for me to go one trying to find > out where the problem in the communication between co2-sensor and > i2c-device driver is, because I don’t really overlook the i2c-device > driver..so first of all I think I should do the bit-banging workaround… It still be much easier to resolve this bug, if you could send me the debug output of the low level communication, and it might be easier than writing a bit-banging driver. Andris > Best regards > Sebastian > > -- > > > > > > > > > > > > Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir > belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
