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. > >> 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 ------------------------------------------------------------------------------ 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
