Bluetooth Configuration and Usage¶
The TiWi-BLE Bluetooth radio/interface comes with a pre-configured (burned-in) MAC address from LSR. As long as the Bluetooth Kernel options are enabled in your kernel build and the necessary firmware is present you can use the hci tools to access the Bluetooth and communicate with devices.
Sample Bluetooth 2.1 Usage¶
The following example will enable the Bluetooth module, show how to check the configuration information of the module, scan for a device and ping a device.
Enable Bluetooth via GPIO 64 (GPIO_20)
root@mitysom-335x ~ $ echo 1 > /sys/class/gpio/gpio64/value
Attach the Bluetooth radio to HCI
root@mitysom-335x ~ $ hciattach /dev/ttyO1 texas 3000000 Found a Texas Instruments' chip! Firmware file : /lib/firmware/TIInit_7.6.15.bts Loaded BTS script version 1 texas: changing baud rate to 3000000, flow control to 1 [ 205.059326] Bluetooth: Core ver 2.16 [ 205.063232] NET: Registered protocol family 31 [ 205.067871] Bluetooth: HCI device and connection manager initialized [ 205.074523] Bluetooth: HCI socket layer initialized [ 205.079620] Bluetooth: L2CAP socket layer initialized [ 205.084930] Bluetooth: SCO socket layer initialized [ 205.134124] Bluetooth: HCI UART driver ver 2.2 [ 205.138793] Bluetooth: HCI H4 protocol initialized [ 205.143859] Bluetooth: HCILL protocol initialized [ 205.266021] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 205.271667] Bluetooth: BNEP filters: protocol multicast [ 205.340911] Bluetooth: RFCOMM TTY layer initialized [ 205.346130] Bluetooth: RFCOMM socket layer initialized [ 205.351501] Bluetooth: RFCOMM ver 1.11 Device setup complete
Confirm that it has been detected
root@mitysom-335x ~ $ hciconfig -a hci0: Type: BR/EDR Bus: UART BD Address: 84:DD:20:69:8D:F8 ACL MTU: 1021:4 SCO MTU: 180:4 UP RUNNING PSCAN RX bytes:1147 acl:0 sco:0 events:37 errors:0 TX bytes:934 acl:0 sco:0 commands:37 errors:0 Features: 0xff 0xfe 0x2d 0xfe 0xdb 0xff 0x7b 0x87 Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 Link policy: RSWITCH HOLD SNIFF Link mode: SLAVE ACCEPT Name: 'mitysom-335x-0' Class: 0x480100 Service Classes: Capturing, Telephony Device Class: Computer, Uncategorized HCI Version: 4.0 (0x6) Revision: 0x0 LMP Version: 4.0 (0x6) Subversion: 0x1f40 Manufacturer: Texas Instruments Inc. (13)
Scan for 2.1 devices
root@mitysom-335x ~ $ hcitool scan Scanning ... 2C:54:CF:91:36:7E LG_Phone 3C:77:E6:F2:A8:2B Device
Ping a 2.1 device
root@mitysom-335x ~ $ l2ping 2C:54:CF:91:36:7E Ping: 2C:54:CF:91:36:7E from 84:DD:20:69:8D:F8 (data size 44) ... 0 bytes from 2C:54:CF:91:36:7E id 0 time 4.49ms 0 bytes from 2C:54:CF:91:36:7E id 1 time 7.26ms 0 bytes from 2C:54:CF:91:36:7E id 2 time 28.35ms 0 bytes from 2C:54:CF:91:36:7E id 3 time 31.10ms
Bluetooth Low Energy (BLE 4.0) Scanning¶
root@mitysom-335x ~ $ hcitool lescan LE Scan ... EA:26:B3:16:6C:CC
TI Script location on Dev Kit SD card: /usr/share/wl1271-demos/bluetooth/scripts/¶
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