On Mon, Mar 18, 2013 at 11:46 PM, jonsm...@gmail.com <jonsm...@gmail.com> wrote: > On Mon, Mar 18, 2013 at 11:43 PM, Alan Ott <a...@signal11.us> wrote: >> On 03/18/2013 10:57 PM, jonsm...@gmail.com wrote: >>> How does the Bluetooth HCI interface work? HCI is a serial line >>> protocol and it has a line discipline. A Bluetooth device attached >>> over a UART would need to set the line disciple. That's because UARTs >>> don't have any device identification mechanism. >>> >>> But... if I plug in a USB stick which implements serial HCI, the code >>> is able to use the USB ID for the device to route the HCI data into >>> the BT stack without any user space intervention. >> >> HCI supports the same commands over multiple media types. In linux, >> btusb handles the USB version and hci_ldisc handles the uart version. >> >>> So... we should be able to make an Econtag (with an USB ID eeprom >>> soldered on to give it a unique ID - Mar that's on Econtag2 right?) >> >> Wouldn't it have to be in the FTDI chip? I tried one day setting a >> serial number in my Econotag using the FTDI tools and couldn't make it >> work (I didn't try very hard, and I was inside a VM, so that could have >> been messing it up too). If that could be made to work, isn't that what >> you want? > > You need to tack a $0.10 eeprom onto the FT2232 so that it will > remember the USB ID. The FT232 has this eeprom on-chip.
Mar works around this by sending a probe down the serial line asking for the MAC address. If the device answers he knows it is an Econotag. You could probably hide that inside a modified USB FT2232 serial driver for dev work. The modified driver would use the MAC address to generate a serial number. But the correct solution is to add the $0.10 EEPROM. > >> >>> talk to the 6lowpan code without needing any user space intervention. >>> But how do you achieve that trick? >> >> I know for HID devices there are some shim drivers which do some custom >> processing for specific devices while the bulk of the work is done by >> hid-core. That's kind of the idea we want here. >> >> There's a function tty_set_ldisc(). It's called in exactly one place >> (from the ioctl() handler), so it looks like maybe nobody is currently >> doing what we're wanting to do. >> >>> One of those would work too. CC2531 based for $17. You can set the >>> USB ID on a CC2531. >>> http://www.aliexpress.com/item/5pcs-Wireless-the-zigbee-module-wireless-communication-module-zigbee-wireless-module-NC910-free-shipping/734720982.html >> >> The MCU on that thing is a beast, and 8051 too! >> >> Alan. >> > > > > -- > Jon Smirl > jonsm...@gmail.com -- Jon Smirl jonsm...@gmail.com ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Linux-zigbee-devel mailing list Linux-zigbee-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-zigbee-devel
