DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 45

• Manufacturer Part Number: DVK-BTM521
• Description: BT MM DEV KIT
• Manufacturer: Laird Technologies
• Type: Transceiver, Bluetoothr

Specifications of DVK-BTM521

• Frequency: 2.4GHz
• Interface Type: RS-232
• Processor Series: BTM521
• Silicon Manufacturer: Laird Technologies
• Kit Application Type: Communication & Networking
• Application Sub Type: Bluetooth
• Kit Contents: Development Board & Software Tools
• Features: Supports CSR
• Rohs Compliant: Yes
• For Use With/related Products: BTM521
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DVK-BTM521

BTM520/521
Bluetooth
AT COMMAND SET
REFERENCE
45 www.lairdtech.com
®
Multimedia Plus Module
AVRCP Feature
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
M: mandatory
O: optional
X: excluded
(1) incomplete
5 AVRCP (Audio Video Remote Control Profile)
Connection establishment for control
Release connection for control
Sending UNIT INFO command
Receiving UNIT INFO command
Sending SUBUNIT INFO command
Receiving SUBUNIT INFO command
Sending VENDOR DEPENDENT command
Receiving VENDOR DEPENDENT command
Sending PASS THROUGH command
Receiving PASS THROUGH command
The “Audio/Video Remote Control Profile” is used to remotely control audio or video streaming devices.
A device must be defined as either control (CT) or target (TG). Furthermore, one of four categories
(Player/Recorder, Monitor/Amplifier, Tuner, Menu) must be assigned to a device.
Version 1.0 of AVRCVP is supported.
The AVRCP specification [3] adopts the AV/C Digital Interface Command Set (AV/C command set,
defined by the 1394 Trade Association) device model and control message format. In this device model
a remote control target consists of one or more subunits. At least the subunit ”PANEL” must exist.
Remote control commands are passed to a subunit with the “PASS THROUGH” command. A BTM
device, configured as target will support one PANEL-subunit.
Table 3.17 gives an overview on supported AVRCP features on a BTM device.
5.1 AVRCP Example 1
This section gives an example of an AVRCP connection between a Laird Technologies BTM5xx
device as AVRCP Controller and a PC with a built in Bluetooth device and Toshiba Bluetooth Stack
2.1 as AVRCP Target.
For any other Bluetooth Stack with AVRCP (target role) support, the setup should follow the steps of:
1.
2.
3.
The BTM5xx device is assumed to be connected to a terminal program, e.g., Ezurio Terminal on a
PC. The sequence of AT commands and the instructions for the PC side are listed in Table 3.18.
Figure 3.16 to Figure 3.21 show appropriate screenshots.
This example can be combined with the A2DP Example 1 (Section 3.1, page 36). Then the AVRCP
connection should be initiated after A2DP is connected.
Identifying Bluetooth Device Address of PC
Enabling AV Remote Control Service
Selecting player and/or setup display of incoming remote control commands
Table 3.17: AVRCP Supported Features on BTM5xx
Support in CT (Control)
Spec.
M
M
O
X
O
X
O
X
M
X
BTM5xx
Yes
Yes
Yes
No
(1)
No
No
No
Yes
No
Support in TG (Target)
Spec.
O
M
X
M
X
M
X
O
X
M
Laird Technologies
BTM5xx
Yes
Yes
No
Yes
No
Yes
No
No
No
Yes