Bluetooth

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This page will give you all the informations needed to have a running Bluetooth configuration on your Armadeus board.

Hardware

First you have to get a compatible hardware. Currently there are 3 solutions:

You have an APF51Dev board, then you're a lucky man because Bluetooth is integrated on the board ;-)
If you have an APF27Dev, then you can get a Wireless extension board with WiFi/Bluetooth option from ARMadeus Systems
Otherwise: get a cheap USB<->Bluetooth adapter (requires an USB Host port) or a RS232<->Bluetooth adapter

Tested USB adapters

Model	Status APF9328 / APF27		Chipset	Comments
BELKIN - Mini Bluetooth Adapter	TBT	KO	Product: BLUETOOTH USB +EDR ADAPTER v2.1 UHE Manufacturer: Broadcom Corp	# hciconfig hci1 up piscan btusb_submit_intr_urb: hci1 urb c3bdac40 submission failed (28) Can't init device hci1: Input/output error (5)
TRUST - Bluetooth 2.1 USB Adapter	TBT	KO	Product: BCM2046B1 Manufacturer: Broadcom	# hciconfig hci1 up piscan btusb_submit_intr_urb: hci1 urb c3bdac40 submission failed (28) Can't init device hci1: Input/output error (5)
RUEDUCOMMERCE - Mini adaptateur USB Bluetooth	TBT	OK	Manufacturer: Cambridge Silicon Radio
GIGABYTE - GN-BTD01	TBT	OK	Manufacturer: Cambridge Silicon Radio	Bluetooth 1.1 ?
BELKIN - F8T003 v2	TBT	OK	Manufacturer: Cambridge Silicon Radio
D-LINK - DBT-122	TBT	OK	Product: BCM2035 Manufacturer: Broadcom

Software

Bluetooth Linux stack is divided into several parts:

kernel drivers
userland libraries/daemon (bluez)

Driver installation

(Done by default on APF27 & APF51)

$ make linux26-menuconfig

[*] Networking support  --->
    <M>   Bluetooth subsystem support  --->
        --- Bluetooth subsystem support
            <M>   L2CAP protocol support 
            <M>   SCO links support
            <M>   RFCOMM protocol support
                [*]     RFCOMM TTY support
            <M>   BNEP protocol support
                [ ]     Multicast filter support (NEW)
                [ ]     Protocol filter support (NEW)
            <M>   HIDP protocol support
            Bluetooth device drivers  --->
                <M> HCI USB driver 
                < > HCI SDIO driver (NEW)
                <M> HCI UART driver
                    [*]   UART (H4) protocol support 
                    [*]   BCSP protocol support 
                    [ ]   HCILL protocol support (NEW)
                < > HCI BCM203x USB driver (NEW)
                < > HCI BPA10x USB driver (NEW)
                < > HCI BlueFRITZ! USB driver (NEW)
                < > HCI VHCI (Virtual HCI device) driver (NEW)

$ make

Bluez installation

(Done by default on APF51)

$ make menuconfig

Package Selection for the target  --->
    ...
    [*] XML handling  --->
        [*]   libxml2
    ...
    [*] Hardware handling  --->
        [*]   dbus
              XML library to use (libxml2)
    ...
    Networking applications  --->
    [*] bluez
    [*] bluez-utils

$ make

Custom Bring up (each hardware may have a different init sequence)

APF51Dev

APF51Dev has a CSR BlueCore 4 chipset connected to the i.MX51 UART3 (ttymxc2)
Attach it to the kernel bluez UART driver:

# /usr/sbin/hciattach -s 921600 ttymxc2 csr 921600

CSR build ID 0x00-0x37
Bluetooth: Core ver 2.15
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: HCI UART driver ver 2.2
Bluetooth: HCI H4 protocol initialized
Bluetooth: HCI BCSP protocol initialized

Go to "Common Bring up" section

APF27Dev + APW

APW has a CSR BlueCore 4 chipset connected to the i.MX27 serial port ttySMX5 (UART6)
Reset it:

# source /usr/bin/gpio_helpers.sh
# gpio_mode PB14 1
# gpio_set_value PB14 0; sleep 1; gpio_set_value PB14 1; sleep 1

Attach it to the kernel bluez UART driver:

# /usr/sbin/hciattach -s 921600 ttySMX5 csr 921600

Go to "Common Bring up" section

USB module

Make sure your hardware is connected to the APF. If using an USB dongle, load corresponding driver:

# modprobe btusb
Bluetooth: Core ver 2.14
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: Generic Bluetooth USB driver ver 0.4
usbcore: registered new interface driver btusb

Common Bring up

Check if Bluetooth interface was detected:

# hciconfig
hci0:   Type: USB
        BD Address: 00:00:00:00:00:00 ACL MTU: 0:0 SCO MTU: 0:0
        DOWN
        RX bytes:0 acl:0 sco:0 events:0 errors:0
        TX bytes:0 acl:0 sco:0 commands:0 errors:0

If interface is DOWN, bring it up:

# hciconfig hci0 up piscan

Check your Bluetooth device is correctly initialized:

# hcitool dev
Devices:
        hci0    00:10:60:D1:92:0F

Usage

Scanning network

To get surrounding devices addresses and names:

# hcitool scan
Scanning ...

To get surrounding devices addresses and classes:

# hcitool inq
Inquiring ...

Get info on a given device

# hcitool info 00:19:0E:xx:xx:xx
...

Pinging other devices

# l2ping 00:19:0E:xx:xx:xx
Ping: 00:19:0E:xx:xx:xx from 00:19:88:xx:xx:xx (data size 44) ...
44 bytes from 00:19:0E:xx:xx:xx id 0 time 38.05ms
44 bytes from 00:19:0E:xx:xx:xx id 1 time 37.09ms
...

Here 00:19:0E:xx:xx:xx is the Bluetooth MAC address of the Host.

Advanced usages

Setup a Terminal between a PC and your APF through Bluetooth

On the APF :

the first step is to create the corresponding node for the future connection:

# mknod /dev/rfcomm0 c 216 0

then, listen to an incoming connection, on the rfcomm0 (here channel 7 is choosen):

# rfcomm -i hci0 listen /dev/rfcomm0 7 &

and the last step, when the connection is open, is to connect a terminal (through getty) to the device /dev/rfcomm0:

# getty 38400 /dev/rfcomm0

On the PC :

after the two first steps on the APF, you need to connect the PC to the APF with the same channel (7):

$ rfcomm connect 0 00:19:88:2B:xx:xx 7             (replace 00:19:88:2B:xx:xx with the Bluetooth @ of your APF)

and configure minicom ($HOME/.minirc.dfl):

pu port             /dev/rfcomm0
pu baudrate         38400
pu bits             8
pu parity           N
pu stopbits         1

when getty is running on the APF, you could you connect with minicom:

$ minicom -o

it could be a good idea to create an additional user account for remotely login through Bluetooth, by following these instructions.

Using a Bluetooth keyboard on your APF

The only thing needed after having a bluetooth correctly configured is to use this command :

$ hidd --connect keyboard_bdaddr

Others

Links

Bluetooth

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