Hi, You are right. I have 4 PCA8574T I/o Expander chip.
On Sat, Sep 6, 2014 at 1:55 AM, <[email protected]> wrote: > So it appears you should expect to see a device between 0x20 through 0x27 > from the datasheets. The device address is 0*0100000* when not shifted > for the R/W bit. That corresponds to 0x20 as the base chip address and > the A1,A2, and A3 pins can set up to 7 other address for the final three > bits. I2C can be really confusing in how the addresses are specified in > various datasheets. Linux reports the 7 bit address of devices it finds in > hexadecimal. > > > I see your output shows devices at 0x20, 0x22, 0x26, and 0x28. That > appears to be the correct* hecxidecimal*, *7-bit,* addresses for the > chips? Do you have 4 chips wired up? > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/eosKBg3yKHw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
