Texas Instruments CC2541 User manual

Bluetooth® Low Energy
CC2541 Advanced Remote Control Kit
User's Guide
Document Number: SWRU343
Document Version: 1.0
Development Kit Part Number: CC2541DK-RC

SWRU343
Page 2 of 19
TABLE OF CONTENTS
1. REFERENCES ..................................................................................................................................... 3
1.1 PRINTED COPY INCLUDED IN THE BOX WITH CC2541-ARC.......................................................................... 3
1.2 INCLUDED WITH TEXAS INSTRUMENTS BLUETOOTH LOW ENERGY SOFTWARE INSTALLER .................................... 3
1.3 AVAILABLE FROM BLUETOOTH SPECIAL INTEREST GROUP (SIG)..................................................................... 3
2. INTRODUCTION ................................................................................................................................ 4
2.1 KIT CONTENTS OVERVIEW...................................................................................................................... 4
2.2 SYSTEM REQUIREMENTS........................................................................................................................ 5
2.2.1 Dongle ..................................................................................................................................... 5
2.2.2 Windows 8............................................................................................................................... 5
2.2.3 Debugging ............................................................................................................................... 5
3. USING THE CC2540 USB DONGLE ...................................................................................................... 6
3.1 PLUGGING IT INTO A COMPUTER.............................................................................................................. 6
3.2 CONNECTING TO THE ADVANCED REMOTE CONTROL................................................................................... 7
3.2.1 First Time Pairing..................................................................................................................... 7
3.2.2 Connection for Devices which are Already Bonded ................................................................. 7
3.2.3 Disconnecting .......................................................................................................................... 7
3.2.4 Removing long term bond-data .............................................................................................. 8
3.2.5 LED states ................................................................................................................................ 8
3.2.6 Button Actions ......................................................................................................................... 8
4. CONNECTING THE ADVANCED REMOTE CONTROL TO WINDOWS 8.................................................. 9
4.1 OPEN THE “DEVICES”TAB OF “PC SETTINGS”AND CLICK “ADD A DEVICE”...................................................... 9
4.2 ADDING THE ADVANCED REMOTE CONTROL............................................................................................ 10
5. USING THE ADVANCED REMOTE CONTROL..................................................................................... 11
5.1 ADVERTISE AND CONNECT .................................................................................................................... 11
5.2 KEYBOARD INPUT ............................................................................................................................... 11
5.3 CONSUMER CONTROL.......................................................................................................................... 11
5.4 MOUSE INPUT ................................................................................................................................... 11
5.5 REMOVE BOND INFORMATION .............................................................................................................. 11
5.6 CALIBRATE ........................................................................................................................................ 11
6. PROGRAMMING / DEBUGGING THE CC2541 ADVANCED REMOTE ................................................. 12
6.1 HARDWARE SETUP FOR ADVANCED REMOTE ........................................................................................... 12
6.2 HARDWARE SETUP FOR USB DONGLE.................................................................................................... 13
6.3 USING SMARTRF FLASH PROGRAMMER SOFTWARE.................................................................................. 14
6.3.1 Reading or Writing a Hex File to the CC2540/41................................................................... 14
6.3.2 Reading or Writing the CC2540/41 Device Address .............................................................. 15
6.4 USING IAR FOR DEBUGGING AND PROGRAMMING ................................................................................... 15
6.4.1 Advance Remote Project Files ............................................................................................... 15
6.4.2 HID Dongle Project Files ........................................................................................................ 15
7. SOFTWARE OVERVIEW ................................................................................................................... 16
7.1 HID OVER GATT ............................................................................................................................... 16
7.1.1 BLE HID Terminology ............................................................................................................. 16
7.1.2 GATT Services ........................................................................................................................ 16
7.1.3 Data Flow .............................................................................................................................. 17
7.1.4 HID Report Overview ............................................................................................................. 18
8. GENERAL INFORMATION ................................................................................................................ 19
8.1 DOCUMENT HISTORY .......................................................................................................................... 19

SWRU343
Page 3 of 19
1. References
The following references provide additional information on the CC2540, CC2541, the Texas Instruments
Bluetooth® low energy (BLE) stack, the BLE HID over GATT profile the HID Service, and the BLE
specification in general. (All path and file references in this document assume that the BLE development
kit software has been installed to the default path C:\Texas Instruments\BLE-CC254x-1.3.1\)
1.1 Printed Copy Included in the Box with CC2541-ARC
[1] CC2541 Advanced Remote Control Kit Quick Start Guide (SWRU341)
1.2 Included with Texas Instruments Bluetooth Low Energy Software Installer
(The software installer is available for download at www.ti.com/ble-stack)
[2] Texas Instruments Bluetooth® Low Energy Software Developer’s Guide (SWRU271)
C:\Texas Instruments\BLE-CC254x-1.3\Documents\TI_BLE_Software_Developer's_Guide.pdf
[3] TI BLE Vendor Specific HCI Reference Guide
C:\Texas Instruments\BLE-CC254x-1.3\Documents\TI_BLE_Vendor_Specific_HCI_Guide.pdf
[4] Texas Instruments BLE Sample Applications Guide (SWRU297)
C:\Texas Instruments\BLE-CC254x-1.3\Documents\TI_BLE_Sample_Applications_Guide.pdf
1.3 Available from Bluetooth Special Interest Group (SIG)
[5] HID over GATT profile, Version 1.0 (27-Dec-2011)
https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=245141
[6] HID Service, Version 1.0 (27-Dec-2011)
https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=245140
[7] Specification of the Bluetooth System, Covered Core Package version: 4.0 (30-June-2010)
https://www.bluetooth.org/technical/specifications/adopted.htm

SWRU343
Page 4 of 19
2. Introduction
Thank you for purchasing a Texas Instruments (TI) Bluetooth® low energy (BLE) Advanced Remote Control
Kit. The purpose of this document is to give an overview of the hardware and software included in the
CC2541 Advanced Remote Control Kit (CC2541ARC).
The information in this guide will get you up and running with the kit; however for more detailed
information on BLE technology and the TI BLE protocol stack, please consult the Texas Instruments
Bluetooth® Low Energy Software Developer’s Guide [2].
For more information on the HID over GATT profile (Human Interface Device over Generic Attribute
Profile), HOGP for short, which is the BLE profile used to transfer HID Reports such as keyboard and
mouse keys, see the HID over GATT profile[5] and HID Service[6] specifications available from the
Bluetooth® Special Interest Group website.
2.1 Kit Contents Overview
The kit contains the following hardware components including cables:
Advanced Remote Control
CC2540 USB Dongle
CC Debugger
CC2541DK-RC
•
•
•
The CC2541 Advanced Remote Control is designed to act as a HID Peripheral Device (BLE Slave),
operating according to the specifications laid out in the HID over GATT profile [5]. It comes pre-assembled
in plastic casing with rubber buttons, battery enclosure and a hole to access the programming header.
The Advanced Remote Control operates on three 1.5V alkaline AAA (LR03) batteries. Available peripheral
hardware on the board includes a buzzer, gyroscope, accelerometer and shift registers for key scanning.
The PCB design also includes a 3.3V LDO (TPS78330) to lower the voltage from a maximum 4.5 Volt to 3.3
Volt for use by the integrated circuits.
The CC2540 USB Dongle can be used to emulate any Bluetooth low energy behavior but is usually acting
as a Central Device (BLE Master) and HID Host. In this kit it comes pre-loaded with firmware that acts in a
Central role and as a HID Service client towards the Advanced Remote Control and sends received input
data to emulated Human Interface Devices (USB HID) on a connected Windows, Linux or OSX computer.
The CC Debugger is used to flash the software onto both the USB Dongle as well as the Advanced Remote
Control. It can also be used for debugging software using IAR Embedded Workbench.
Figure 1 –Hardware Included with CC2541ARC
The RF Boards in this kit are FCC and IC certified and tested to comply with ETSI/R&TTE over temperature from 0 to +35°C.
Caution! The kits include a non-rechargeable lithium battery. Always make sure the battery is removed from the CC2540/41 Keyfob
when it is connected to an external power source (Do not apply voltage > 3.6V). Dispose the battery properly and keep out of the
reach of children. If swallowed, contact a physician immediately.
Caution! The kits contain ESD sensitive components. Handle with care to prevent permanent damage.

SWRU343
Page 5 of 19
2.2 System Requirements
2.2.1 Dongle
To use the CC2540USB dongle as a bridge between the Advanced Remote Control and a host computer,
only USB HID support in the operating system is necessary.
For computers without Bluetooth® low energy capable hardware and native support for the HID over
GATT profile in the operating system, using the dongle is a good way to start, as it hides the wireless
aspect completely from the operating system.
From a hardware standpoint, the Windows PC must contain one free USB port. An additional free USB
port is required in order to use the CC Debugger and the USB Dongle simultaneously.
2.2.2 Windows 8
For computers running Windows 8, the requirement is a Bluetooth® 4.0 dual mode dongle or internal
hardware, with hardware drivers that support Bluetooth® low energy. This can be verified in the Windows
Device Manager by checking that there are references to e.g. “Bluetooth LE Enumerator”
Figure 2 Bluetooth devices as seen in Windows Device Manager
2.2.3 Debugging
IAR Embedded Workbench for 8051 development environment is required in order to make changes to
the keyfob software. More information on IAR can be found in the Texas Instruments Bluetooth® Low
Energy Software Developer’s Guide [1].

SWRU343
Page 6 of 19
3. Using the CC2540 USB Dongle
This section describes how the USB dongle appears to a computer running Windows 7, how it operates
and how to use the buttons on the dongle.
3.1 Plugging it into a computer
As the CC2540 USB dongle comes pre-programmed with emulated Human Interface Device USB
endpoints, no extra drivers are necessary, and it should work out of the box. After the USB dongle has
been discovered and configured by Windows you will notice some extra USB HID devices in the device
manager.
Figure 3 CC2540 USB Dongle, when viewed in Device Manager sorted by connection.
Figure 3 above shows the USB dongle enumerated as a USB Composite Device with four interfaces which
represent different capabilities of the Advanced Remote Control and USB dongle:
HID Keyboard Device
oNumber keys, arrow keys, OK and Back on the Advanced Remote
HID-compliant consumer control device
oVolume buttons, play, pause, rewind and similar consumer device control buttons
HID-compliant mouse
oMovement data sent from the Advanced Remote when the mouse is activated
HID-compliant device
oControl point for communication between USB dongle firmware and applications running on
the computer. Can be used for pairing, pin codes, feedback, resetting etc. Not in use by the
pre-programmed USB dongle firmware.

SWRU343
Page 7 of 19
3.2 Connecting to the Advanced Remote Control
3.2.1 First Time Pairing
When the devices are programmed, they lose all stored pairing information. The dongle will power up
and show a solid red LED. To initiate a connection to an ARC press the SW2 button on the HID dongle. This
will cause the HID Dongle to scan for an ARC for 5 seconds. While scanning, the red LED will blink once a
second. Press any key on the ARC to start advertising.
Once a suitable advertisement has been found, the CC2540 USB dongle will connect, pair and exchange
long-term bonding information with the remote, perform discovery of the services and characteristics
used by the HID over GATT profile and enable GATT notifications to be sent for button presses and mouse
movements from the Advanced Remote.
The green LED will light up when the connection is alive, and the red LED will blink when data is received.
The connection will be terminated to save power after the Advanced Remote has been idle for 60s.
Figure 4:
SW1 - Clear bonding information
SW2 - Scan and pair with Advanced Remote Control
Sequence
1. Press SW2 to start scanning for remote. Blinking red LED indicates scanning.
2. Press any key on remote to start advertising.
3. Verify green LED which indicates a successful connection.
3.2.2 Connection for Devices which are Already Bonded
If a HID Dongle and Advanced Remote previously paired and stored bonding data, then the HID Dongle
will continuously scan for this specific Advanced Remote. When in this continuous scanning mode, the
HID Dongle will blink the green LED once a second.
A HID dongle only stores pairing information for one remote, so other remotes will not be able to connect
to the HID dongle until the bonding info is cleared.
3.2.3 Disconnecting
Pressing SW2 on the dongle will cause it to disconnect from the Advanced Remote Control and go back to
scanning, but to retain long-term bonding information.
Since the Advanced Remote and the USB dongle are bonded and notifications are enabled on the remote,
activating the Advanced Remote Control will cause it to start advertising, reconnect and immediately
transmit the button press(es) recorded while disconnected.

SWRU343
Page 8 of 19
3.2.4 Removing long term bond-data
Pressing SW1 as seen on Figure 4 while not in a connection will cause the USB dongle to erase its record
of the long-term bonding data stored for the Advanced Remote in the Flash memory of the USB dongle.
This will not affect the data stored on the Advanced Remote. See the section on the Advanced Remote for
information on how to erase this data.
3.2.5 LED states
LED Action
HID Dongle State
Solid Red
Idle
Blinking Red
Scanning for any BLE advanced remote
Solid Green
Connected
Blinking Green
Scanning for previously bonded remote
3.2.6 Button Actions
Button
State
Action
SW1
Idle
Erase bonding info
SW2
Idle
Start scanning
SW2
Connected
Disconnect

SWRU343
Page 9 of 19
4. Connecting the Advanced Remote Control to Windows 8
Once Bluetooth® low energy capable hardware is installed in a Windows 8 computer and updated drivers
are installed (refer to section 2.2.2), you can discover and use the Advanced Remote Control by following
the steps below.
4.1 Open the “Devices” tab of “PC Settings” and click “Add a Device”
On the PC, move your mouse pointer to the lower right hand corner and click on “Settings”.
Figure 5 “Settings” icon visible when moving cursor to lower right hand corner
A new widget will appear, allowing you to click on “Change PC settings”.
Figure 6 Click ”Change PC settings”
This will open up the PC settings panel, allowing you to add and remove devices.
Figure 7 Adding a device

SWRU343
Page 10 of 19
4.2 Adding the Advanced Remote Control
After clicking on HID AdvRemote in Figure 8 Windows will try and connect to the Advanced Remote. The
Advanced Remote only advertises for 30 seconds, so the user may have to press a key on the remote to
place it in advertising mode.
Figure 8