Please send messages to the help list, I'm cc'ing this back there... I believe a similar protocol works for I2C register reading. The devices I've worked with need a command that specifies which register will be read, followed by the actual read. Again, study your device's spec sheet carefully and you will probably find the information -- sometimes it's written in a kind of code invented by the authors though.
MS bin chen wrote: > Hi, > Thaks for your reply, I wrote the data to the slave device just as you > tell me. the first byte of the data is register address, and the > followings are the data i should be writeen to the register. But how can > i read the data from specify register? The command async command error_t > read(i2c_flags_t flags, uint16_t addr, uint8_t length, uint8_t* data); > of interface I2Cpacket only provides the parameters of slave device > address. Thanks for your help！ > Best regards > > 2010/10/19 Michael Schippling <[email protected] <mailto:[email protected]>> > > Usually the message sent to the I2C device > contains the register address along with > the data. Look carefully at the message > format spec for your device. > > MS > > bin chen wrote: > > Hi, > I need to connect an I2C device to the telosb mote. The I2C > device has a device address, besides, it has mutiple registers. > When I use the device, some registers are needed to be writeen > and read. But I found that the I2Cpacket interface provides the > command/event only with the parameters of slave device address > without register address. How can I do to writen or read one of > the registers? Thanks for your help! > Best regards, > Bob > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Tinyos-help mailing list > > [email protected] > <mailto:[email protected]> > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
