CC2541 Advanced Remote Control Kit User's Guide Bluetooth
Bluetooth® Low Energy
CC2541 Advanced Remote Control Kit
Document Number: SWRU343
Document Version: 1.0
Development Kit Part Number: CC2541DK-RC
TABLE OF CONTENTS
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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
 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
 Texas Instruments Bluetooth® Low Energy Software Developer’s Guide (SWRU271)
 TI BLE Vendor Specific HCI Reference Guide
 Texas Instruments BLE Sample Applications Guide (SWRU297)
1.3 Available from Bluetooth Special Interest Group (SIG)
 HID over GATT profile, Version 1.0 (27-Dec-2011)
 HID Service, Version 1.0 (27-Dec-2011)
 Specification of the Bluetooth System, Covered Core Package version: 4.0 (30-June-2010)
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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
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
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
• • •
The CC2541 Advanced Remote Control is designed to act as a HID Peripheral Device (BLE Slave),
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.
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2.2 System Requirements
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
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
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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.
represent different capabilities of the Advanced Remote Control and USB dongle:
HID Keyboard Device
o Number keys, arrow keys, OK and Back on the Advanced Remote
HID-compliant consumer control device
o Volume buttons, play, pause, rewind and similar consumer device control buttons
o Movement data sent from the Advanced Remote when the mouse is activated
o Control 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.
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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.
SW1 - Clear bonding information
SW2 - Scan and pair with Advanced Remote Control
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.
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.
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3.2.4 Removing long term bond-data
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
Scanning for any BLE advanced remote
Solid Green Connected
Blinking Green Scanning for previously bonded remote
3.2.6 Button Actions
Erase bonding info
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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
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
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4.2 Adding the Advanced Remote Control
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.
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5. Using the Advanced Remote Control
Figure 9 – Advanced Remote Control
5.1 Advertise and connect
Almost all the keys will make the Advanced Remote start advertising and be discoverable by hosts scanning for HID capable BLE devices.
5.2 Keyboard input
Pressing any number will act as a keyboard input of that number. The same goes for OK which is Enter,
Back which is Backspace and the four keys surrounding OK, which act as directional or arrow keys.
5.3 Consumer control
Buttons such as Volume, Mute, Play/Pause etc. are consumer control keys, and will control media settings on your computer.
5.4 Mouse input
Holding down the middle mouse button will prompt the Advanced Remote to interpret your movement of the remote as mouse input and send this to the computer.
Double clicking the middle button will lock the mouse function. The left and right buttons act as left and right mouse buttons.
Pressing AV and –/– will decrease and increase mouse speed.
5.5 Remove bond information
Pressing the Red action key (leftmost) will remove bonding information stored on the Advanced Remote.
Pairing will have to be done again, using passkey entry if applicable. If the remote is in a connection, the connection will be dropped, and then the bonding information will be erased.
Pressing the Blue action key (rightmost) will recalibrate the onboard motion sensors. The mouse function must be off and the device must lie on a flat surface when doing this. If the Advanced Remote is not ready for calibration, a high pitched note will sound. Just press the blue key again. During calibration a lowpitched tick will sound for 12 seconds. A high-pitched note at the end indicates success.
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6. Programming / Debugging the CC2541 Advanced Remote
The CC Debugger included with the Advanced Remote kit allows for debugging using IAR Embedded
Workbench for 8051, as well as for reading and writing hex files to the CC2540/41 flash memory using the
SmartRF Flash Programmer software. The hex files are included with the installer. SmartRF Flash
Programmer also has the capability to change the IEEE address of the CC2540/41 device. This section details the hardware setup when using the CC Debugger, as well as information on using SmartRF Flash
Programmer. Information on using IAR Embedded Workbench for debugging can be found in the Texas
6.1 Hardware Setup for Advanced Remote
The debug port is found on the back side of the remote. Connect the debugger as shown. The red stripe
(pin 1) should be on the same side as the blue and #3 keys. When connected properly, the debugger LED will show green after pressing the CC debugger reset button.
Figure 10 Advanced Remote Programming Setup
Power Savings Tip: Leaving the remote in debug mode will cause some extra power drain on the battery. To exit debug mode, remove the debugger cable and power cycle the remote.
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6.2 Hardware Setup for USB Dongle
The setup process for flashing the USB Dongle is very similar to the process when flashing the remote.
Connect the CC Debugger to the USB Dongle as shown below. Be sure that the ribbon cable is oriented properly, with the red stripe connected to pin 1 as shown in figure below. The USB dongle also must be powered to program, and should be placed in a USB port prior to programming with CC Debugger.
Figure 11 CC2540 USB Dongle Connected to CC Debugger
Connect the CC Debugger to the PC USB port. The status indicator LED on the CC Debugger should turn on. If the LED is red, that means no CC2540 device was detected. If it is green, then a CC2540 device has been detected. If the USB Dongle is connected and the LED is red, try pressing the reset button on the CC
Debugger. This resets the debugger and re-checks for a CC2540 device. If the LED still does not turn green, re-check that all cables are securely connected. Once the CC Debugger status LED is showing green, you are ready to use IAR to debug or to read or write a hex file from/to the USB Dongle.
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6.3 Using SmartRF Flash Programmer Software
Note: the instructions in the section apply to the latest version of SmartRF Flash Programmer (version
1.12.6), which is available at the following URL: http://www.ti.com/tool/flash-programmer
To start the application go into your programs by choosing Start > All Programs > Texas Instruments >
SmartRF Flash Programmer > SmartRF Flash Programmer. The program start-up screen is shown below.
Note. If you get prompted to update the EB Firmware (CC Debugger), follow the presented instructions to update the CC Debugger.
6.3.1 Reading or Writing a Hex File to the CC2540/41
To read or write a hex file to the CC2540/41, select the “System-on-Chip” tab (default). The connected
CC2540/41 should be detected and show up in the list of devices. Under “Flash image” select the desired hex file that you would like to write to the device. If you are reading from the CC2540/41, under “Flash image” enter the desired path and filename for the hex file. To write to the CC2540/41, under “Actions” select “Erase, program and verify”. To read from the CC2540/41, under “Actions” select “Read flash into hex-file”. To begin the read or write, click the button “Perform actions”.
If the action completes successfully, you should see the progress bar at the bottom of the window fill up, and either one of the following two messages, depending on whether a write or a read was performed:
“CC254X - IDXXXX: Erase, program and verify OK” or “CC254X - IDXXXX: Flash read OK”.
There are two pre built image files intended for the Advanced Remote Kit.
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6.3.2 Reading or Writing the CC2540/41 Device Address
Every CC2540/41 device comes pre-programmed with a unique 48-bit IEEE address. This is referred to as the device’s “primary address”, and cannot be changed. It is also possible to set a “secondary address” on a device, which will override the primary address upon power-up. Flash Programmer can be used to read the primary address, as well as to read or write the secondary address. For more information refer to the
6.4 Using IAR for Debugging and Programming
IAR is the compiler and IDE used to develop the Advanced Remote and HID dongle. For more information
section provided a high level overview of advanced remote kit software projects
There are two projects intended for the Advanced Remote Kit.
6.4.1 Advance Remote Project Files
The following are important file componets of the Advance Remote Control project. After opening the project in IAR, these will be visble in the left hand project explorer.
File Description hidAdvRemote.c battservice.c
Top level application. Initialization of remote hardware, connection settings,
GATT, and top level task handlers. Keys and gyro/accelerometer callbacks are handled here.
Service for battery. Support characteristics for battery. devinfoservice.c hidDev.c hidkbmservice.c hid_uuid.h
Service for device info. Support characteristics such as manufacturer, serial number, etc.
Service for HID. Support HID reads, writes, queuing reports, state machine.
Service for keyboard, mouse and consumer control reports.
List of UUIDs for supported HID reports.
Service for scan parameters.
6.4.2 HID Dongle Project Files
The following are important file components of the HID Dongle project.
File Description hidApp.c
Top level application. Initialization of dongle hardware, service discovery, and connection state machines.
HID to USB report handling. hid_uuid.h List of UUIDs for supported HID reports.
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7. Software Overview
7.1 HID over GATT
The software supports the HID Over GATT Profile specification which was approved by the BT SIG in
December 2011. The specification is publicly available at bluetooth.org. Microsoft Windows 8 supports
HID over GATT.
7.1.1 BLE HID Terminology
HID Host The target machine that the user interacts with (e.g. Laptop, tablet, phone, etc...)
The device that is used by the user to interact with the Host (e.g. Keyboard, mouse, remote control, game controller, etc...)
A data message sent between the host and device.
Input reports go from device-to-host, such as a mouse movement or keyboard press.
Output reports go from host-to-device, such as a PC changing the caps lock LED on a keyboard
HID Report Descriptor A data structure that the device sends to the host which describes the HID device’s capabilities, including the types, sizes, and directions of the reports that are supported
7.1.2 GATT Services
The following services are defined in the HID profile specification as either mandatory or optional. The software included with the Advance Remote Kit includes all of these services.
Battery Service Mandatory
Device Information Service Mandatory
Scan Parameter Service Optional
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7.1.3 Data Flow
The following data flow shows how HID reports are sent to Central device.
Scan keys on ISR
hal_key.c / OSAL.c / hal_drivers.c
Keyscan result, row & col
hidAdvRemote.c : KeyCback
Command, Usage page
Periodic sensor poll
C sensor data
X + Y ”Mickeys”
hidAdvRemote.c : MotionSensorCback
X + Y ”Mickeys”
Build HID report
HID Kbd/CC Input report
hidDev.c : HidDev_Report
HID Mouse/Kbd/CC Input report
hidAdvRemote.c : hidMouseSendReport hidDev.c : hidDevSendReport
Build HID report
HID Mouse Input report
OTA to Central device acting as
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7.1.4 HID Report Overview
The following HID reports are supported in the Advanced Remote Control.
Type Bytes Data Function Ref
Mouse 4 Buttons, X, Y, wheel hidMouseSendReport
Consumer Control 2
Bitmap command hidCCSendReport
Modifier, reserved, key code 1..6 hidKeyboardSendReport
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8. General Information
8.1 Document History
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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions.
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in safety-critical applications.
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.
Clocks and Timers
OMAP Applications Processors
Wireless Connectivity www.ti.com/audio amplifier.ti.com
Automotive and Transportation www.ti.com/automotive
Communications and Telecom www.ti.com/communications
Computers and Peripherals
Energy and Lighting
Security www.ti.com/computers www.ti.com/consumer-apps www.ti.com/energy www.ti.com/industrial www.ti.com/medical www.ti.com/security
Space, Avionics and Defense www.ti.com/space-avionics-defense
Video and Imaging
TI E2E Community
www.ti.com/wirelessconnectivity www.ti.com/video e2e.ti.com
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Copyright © 2013, Texas Instruments Incorporated