Dialog Semiconductor SmartBond DA14585 User manual

User Manual
DA14585 Voice RCU Software
Manual
UM-B-086
Abstract
This document describes the software of the DA14585 Voice Remote Control Unit reference design
application, based on the DA14585 Bluetooth 5.0 SoC with Audio Interface.

UM-B-086
DA14585 Voice RCU Software Manual
User Manual
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© 2017 Dialog Semiconductor
Contents
Abstract................................................................................................................................................ 1
Contents............................................................................................................................................... 2
Figures.................................................................................................................................................. 4
Tables ................................................................................................................................................... 5
1Terms and Definitions................................................................................................................... 6
2References..................................................................................................................................... 7
3Introduction.................................................................................................................................... 8
4Features.......................................................................................................................................... 8
5System Architecture ..................................................................................................................... 9
6Using the Reference Design Board........................................................................................... 11
6.1 Connecting the Debugger................................................................................................... 11
6.2 Building and Downloading the Firmware ............................................................................ 12
6.3 Using the Hardware ............................................................................................................ 14
6.3.1 Connecting and Testing the Keypad and Sound................................................. 14
6.3.2 Testing the Motion, Trackpad, Slider, IR and LED functionality.......................... 24
6.3.3 Firmware Updating Using SUOTA....................................................................... 25
7Software Architecture................................................................................................................. 27
7.1 General Description ............................................................................................................ 27
7.2 Low Level Drivers (LLDs).................................................................................................... 28
7.3 Modules............................................................................................................................... 28
7.4 Including Modules in the Project......................................................................................... 29
7.5 User RCU Application......................................................................................................... 30
7.6 Configuration Files .............................................................................................................. 32
7.6.1 User Configuration Files...................................................................................... 32
7.6.2 Module Configuration Files.................................................................................. 33
7.7 Project Folder Structure ...................................................................................................... 34
8Modules........................................................................................................................................ 35
8.1 Keyboard Module................................................................................................................ 35
8.1.1 Description........................................................................................................... 35
8.1.2 Configuration ....................................................................................................... 36
8.1.3 Design Considerations......................................................................................... 37
8.2 Audio Module ...................................................................................................................... 38
8.2.1 Description........................................................................................................... 38
8.2.2 Configuration ....................................................................................................... 39
8.3 BLE Stream Module............................................................................................................ 40
8.3.1 Description........................................................................................................... 40
8.3.2 Configuration ....................................................................................................... 41
8.3.3 Design Considerations......................................................................................... 41
8.4 Motion Module..................................................................................................................... 42
8.4.1 Description........................................................................................................... 42
8.4.2 Configuration ....................................................................................................... 42
8.5 Touchpad Module ............................................................................................................... 43
8.5.1 Description........................................................................................................... 43

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8.5.2 Configuration ....................................................................................................... 45
8.6 IR Module............................................................................................................................ 46
8.6.1 Description........................................................................................................... 46
8.6.2 Configuration ....................................................................................................... 46
8.6.3 Design Considerations......................................................................................... 47
8.7 GPIO Keys Module ............................................................................................................. 47
8.7.1 Description........................................................................................................... 47
8.7.2 Configuration ....................................................................................................... 48
8.7.3 Design Considerations......................................................................................... 48
8.8 HID Report Module ............................................................................................................. 49
8.8.1 Description........................................................................................................... 49
8.8.2 Configuration ....................................................................................................... 49
8.9 Advertising FSM Module..................................................................................................... 50
8.9.1 Description........................................................................................................... 50
8.9.2 Configuration ....................................................................................................... 56
8.10 Connection FSM Module..................................................................................................... 57
8.10.1 Description........................................................................................................... 57
8.10.2 Configuration ....................................................................................................... 63
8.11 LED Indicators Module........................................................................................................ 65
8.11.1 Description........................................................................................................... 65
8.11.2 Configuration ....................................................................................................... 66
8.11.3 Design Considerations......................................................................................... 67
8.12 Sound Indicator Module...................................................................................................... 68
8.12.1 Description........................................................................................................... 68
8.12.2 Configuration ....................................................................................................... 68
8.13 Power Manager Module...................................................................................................... 69
8.13.1 Description........................................................................................................... 69
8.13.2 Configuration ....................................................................................................... 69
8.13.3 Design Considerations......................................................................................... 69
8.14 Wakeup Controller Module ................................................................................................. 70
8.14.1 Description........................................................................................................... 70
8.14.2 Configuration ....................................................................................................... 70
8.15 Timer Controller Module...................................................................................................... 71
8.15.1 Description........................................................................................................... 71
8.15.2 Configuration ....................................................................................................... 71
8.15.3 Design Considerations......................................................................................... 71
8.16 SysTick Controller Module.................................................................................................. 72
8.16.1 Description........................................................................................................... 72
8.16.2 Configuration ....................................................................................................... 72
8.16.3 Design Considerations......................................................................................... 72
9BLE Services ............................................................................................................................... 73
9.1 Dialog Audio Service........................................................................................................... 73
9.1.1 Control Point Characteristic................................................................................. 73
9.1.1.1 Control Point Commands ................................................................ 73
9.1.1.2 Control Point Notifications ............................................................... 75
9.1.2 Device Configuration Characteristic .................................................................... 76
9.1.3 Audio Data Report Characteristic........................................................................ 77

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9.2 HID Over GATT Profile ....................................................................................................... 78
9.2.1 Description........................................................................................................... 78
9.2.1.1 Vendor-Defined Reports for Audio Stream...................................... 78
9.2.1.2 Vendor-Defined Report for Gyro/Accelerometer Sensor................. 79
9.2.2 Configuration ....................................................................................................... 79
Appendix A Reconnect the RCU from Scratch............................................................................... 81
Appendix B Build and Download the Firmware to Other Hardware............................................. 83
B.1 ProDK Kit Configuration...................................................................................................... 88
B.1.1 app_audio_config.h ............................................................................................. 88
B.1.2 app_bmi160_config.h .......................................................................................... 89
B.1.3 app_kbd_matrix.h................................................................................................ 90
B.1.4 app_kbd_scan_matrix.h....................................................................................... 91
B.1.5 app_motion_config.h ........................................................................................... 92
B.1.6 user_config.h ....................................................................................................... 92
B.1.7 user_periph_setup.h............................................................................................ 93
B.1.7.1 Shuttle Board Connection over I2C................................................. 93
B.1.7.2 Shuttle Board Connection over SPI................................................. 94
Appendix C Create SUOTA Image ................................................................................................... 95
Appendix D Slider Gestures............................................................................................................. 96
Revision History ................................................................................................................................ 98
Figures
Figure 1: System Block Diagram........................................................................................................... 9
Figure 2: Voice RCU with Trackpad.................................................................................................... 11
Figure 3: Connecting the Debugger .................................................................................................... 11
Figure 4: Software Architecture Diagram ............................................................................................ 27
Figure 5: Keyboard Module Block Diagram......................................................................................... 35
Figure 6: Audio Module Block Diagram............................................................................................... 38
Figure 7: BLE Stream Module Block Diagram..................................................................................... 40
Figure 8: Motion Module Block Diagram............................................................................................. 42
Figure 9: Touchpad Module Block Diagram........................................................................................ 43
Figure 10 Touchpad Module - Tracking State Machine...................................................................... 45
Figure 11: IR Module Block Diagram .................................................................................................. 46
Figure 12: GPIO Keys Module Block Diagram.................................................................................... 47
Figure 13: HID Report Module Block Diagram.................................................................................... 49
Figure 14: Advertising FSM State Transition Diagram........................................................................ 56
Figure 15: LED Indicators Module Block Diagram .............................................................................. 65
Figure 16: LED Connection to GPIO Pin............................................................................................. 65
Figure 17: Sound Indicator Module Block Diagram............................................................................. 68
Figure 18: Power Manager Module Block Diagram ............................................................................ 69
Figure 19: Wakeup Controller Module Block Diagram........................................................................ 70
Figure 20: Timer Controller Module Block Diagram............................................................................ 71
Figure 21: SysTick Controller Module Block Diagram......................................................................... 72
Figure 22: ProDK with a QFN40 DA14585.......................................................................................... 88
Figure 23: Microphone Pins and Cables ............................................................................................. 88
Figure 24: BMI160 Shuttle Board........................................................................................................ 89
Figure 25: Shuttle Board Connector.................................................................................................... 89
Figure 26: 4 x 4 Keyboard................................................................................................................... 90
Figure 27: Create SUOTA Image........................................................................................................ 95

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Tables
Table 1: Voice RCU Key Peripheral Components ................................................................................ 9
Table 2: Debug Connector Pinout....................................................................................................... 10
Table 3: Test Connector Pinout........................................................................................................... 10
Table 4: Steps for Building and Downloading the Firmware............................................................... 12
Table 5: Steps for Connecting and Testing the Keypad and Sound................................................... 14
Table 6: LED Functionality .................................................................................................................. 24
Table 7: Steps for Firmware Updating Using SUOTA......................................................................... 25
Table 8: Audio Stream In-Band Commands........................................................................................ 31
Table 9: Compressed Audio Bit Rate.................................................................................................. 39
Table 10: ADV_IDLE State Transitions............................................................................................... 51
Table 11: ADV_DIRECTED State Transitions..................................................................................... 51
Table 12: ADV_UNDIRECTED State Transitions ............................................................................... 52
Table 13: ADV_UNDIRECTED_LIM State Transitions ....................................................................... 53
Table 14: ADV_UNDIRECTED_NO_PAIRING State Transitions....................................................... 53
Table 15: ADV_UNDIRECTED_SLOW State Transitions................................................................... 54
Table 16: ADV_FSM_EVENT_PENDING State Transitions............................................................... 54
Table 17: IDLE_ST State Transitions.................................................................................................. 59
Table 18: ADVERTISING_ST State Transitions ................................................................................. 59
Table 19: CONNECTION_IN_PROGRESS_ST State Transitions ..................................................... 60
Table 20: CONNECTED_PAIRING_ST State Transitions.................................................................. 60
Table 21: CONNECTED_ST State Transitions................................................................................... 61
Table 22: POWEROFF_ST State Transitions..................................................................................... 62
Table 23: DISCONNECTED_INIT_ST State Transitions.................................................................... 62
Table 24: WAITING_DISCONNECTION_AFTER_POWEROFF State Transitions............................ 62
Table 25: Dialog Audio Service Characteristics .................................................................................. 73
Table 26: Control Point Command Structure ...................................................................................... 73
Table 27: Control Point Commands.................................................................................................... 73
Table 28: Set ATT Packet Size Command Parameters...................................................................... 74
Table 29: Set Connection Parameters Command Parameters........................................................... 74
Table 30: Emulate Key Press Command Parameters ........................................................................ 74
Table 31: Control Point Notification Structure..................................................................................... 75
Table 32: Control Point Notifications................................................................................................... 75
Table 33: Keyboard Key Report Fields ............................................................................................... 75
Table 34: Debug Info Report Fields .................................................................................................... 76
Table 35: Connection Parameter Report Fields.................................................................................. 76
Table 36: ATT packet size report fields............................................................................................... 76
Table 37: Device Configuration Structure ........................................................................................... 76
Table 38: Audio Stream Configuration Report Fields.......................................................................... 76
Table 39: Vendor-Defined HID Reports for Audio Stream Functionality............................................. 78
Table 40: Vendor Defined HID Reports for Gyro/Accelerometer Sensor............................................ 79
Table 41: Reconnect the RCU from Scratch....................................................................................... 81
Table 42: Build and Download the Firmware to Other Hardware........................................................ 83
Table 43: Microphone Connection ...................................................................................................... 88
Table 44: Special Keys........................................................................................................................ 90
Table 45: Keyboard Definitions ........................................................................................................... 91
Table 46: Keyboard Connection.......................................................................................................... 91
Table 47: Module Configuration .......................................................................................................... 92
Table 48: I2C Pin Configuration .......................................................................................................... 93
Table 49: Shuttle Board Connection over I2C..................................................................................... 93
Table 50: SPI Pin Definitions............................................................................................................... 94
Table 51: Shuttle Board Connection over SPI..................................................................................... 94
Table 52: Slider Gestures.................................................................................................................... 96

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1 Terms and Definitions
ADPCM Adaptive Differential Pulse-Code Modulation
ATT ATTribute (protocol)
BLE Bluetooth low energy
CCC Client Characteristic Configuration
DIS Device Information Service
DLE Data packet Length Extension
EEPROM Electrically Erasable Programmable Read Only Memory
FSM Finite State Machine
GAP Generic Access Profile
GATT Generic ATTribute profile
GPIO General Purpose Input Output
GUI Graphical User Interface
HID Human Interface Device
HOGP HID Over GATT Profile
I2C Inter-Integrated Circuit (bus)
IMA Interactive Multimedia Association
L2CAP Logical Link Control and Adaptation Protocol
LED Light Emitting Diode
LLD Low Level Driver
MITM Man In The Middle
NVM Non-Volatile Memory (Flash or EEPROM)
PCB Printed Circuit Board
PCM Pulse Code Modulation
PDM Pulse Density Modulation
PTT Push To Talk
RAM Random Access Memory
RCU Remote Control Unit
SoC System on a Chip
SPI Serial Peripheral Interface
SWD Serial Wire Debug
USB Universal Serial Bus
UUID Universally Unique IDentifier

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2 References
[1] DA14585 Bluetooth 5.0 SoC with Audio Interface, Datasheet, Dialog Semiconductor.
[2] UM-B-080 DA14585/586 SDK 6 Software Developer’s Guide, User Manual, Dialog
Semiconductor.
[3] UM-B-079 DA14585/586 SDK 6 Software Platform Reference, User Manual, Dialog
Semiconductor.
[4] UM-B-049 DA1458x Getting started with Development Kit - Pro, User Manual, Dialog
Semiconductor.
[5] UM-B-009 DA14580 Keyboard reference application, User Manual, Dialog Semiconductor.
[6] UM-B-037 DA14580 Remote control BLE & IR reference application, User Manual, Dialog
Semiconductor.
[7] AN-B-10 DA1458x using SUOTA, Application Note, Dialog Semiconductor.
[8] HID over GATT Profile, Specification, Bluetooth SIG.
[9] HID Service, Specification, Bluetooth SIG.
[10] Battery Service, Specification, Bluetooth SIG.
[11] Device Information Service, Specification, Bluetooth SIG.
[12] Bluetooth core 5.0, Specification, Bluetooth SIG.
[13] Bluetooth SIG website: Specification Adopted Documents, Bluetooth SIG.
[14] Universal Serial Bus - Device Class Definition for Human Interface, Specification, USB
Implementers’ Forum.
[15] Universal Serial Bus - HID Usage Tables, Specification, USB Implementers’ Forum.
[16] UM-B-087 DA14585 Voice RCU Hardware Manual, User manual, Dialog Semiconductor.

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3 Introduction
This document describes the software of the Voice Remote Control Unit reference design, which is
based on the DA14585 Bluetooth®low energy 5.0 SoC with Audio Interface. This user guide
describes the software architecture and the software components that can be optionally included to
implement various features of the Voice RCU reference design. It also describes the functionality of
each component, as well as the mechanism to enable and configure it. Finally, it briefly describes the
hardware components used in the Voice RCU reference design. The hardware is described in detail
in the Voice RCU hardware manual [16].
The developer is suggested to get familiar with the DA14585 software and hardware, looking into the
development kit [4], software developer's guide [2], the software platform reference manual [3] and
the DA14580 Keyboard Reference application [5].
4 Features
The Voice RCU reference design supports the following features:
●12 keys in a 4 x 3 matrix (customizable)
●On-board non-volatile Flash memory for storing the firmware and the bonding information
●Simultaneous key presses
●Programmable key debouncing
●Key de-ghosting
●Audio capturing using a PDM microphone
●16-bit, 8 kHz or 16 kHz Audio IMA ADPCM encoder
●Adaptive audio sampling rate
●Audio data transfer over HOGP or custom Dialog Audio BLE service
●Audio buffering capabilities exceeding 1 second
●Pointing device functionality using a gyro/accelerometer sensor
●Pointing device functionality using a trackpad
●Advanced user input using a touch slider
●Infra-Red (IR) LED transmitter
●Two LEDs for indicating RCU state
●A magnetic buzzer for indicating RCU state
●Software Update Over The Air (SUOTA)
●Low external component count
●Ultra-low power operation
●Host demo application with audio capabilities for Android platform
The reference application is based on the HID over GATT Profile [8]. It is an adaptation of the USB
HID specification for operation over a Bluetooth Low Energy wireless link. The HID over GATT profile
requires the Generic Attribute Profile (GATT), the Battery Service and the Device Information
Service. The remote application implements the HID Device role. The GATT role is Server and the
GAP role is Peripheral.
The reference application exposes the following services:
●Device Information Service
●HID Over GATT Profile (HOGP)
●Battery Service
●GAP Service
●GATT Service

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●SUOTA Service (optional)
●Custom Dialog Audio Service (optional)
For more information see the HID over GATT Profile [8], the HID Service Specification [9], the Device
Information Specification [11] and the Battery Service Specification [10]. The Bluetooth Core 5.0
Specification [12] contains detailed information about GATT and GAP.
5 System Architecture
The system architecture of the Voice RCU reference design is depicted in Figure 1.
DA14585 BLE SoC with Audio Interface
Debug connectorSPI Flash Gyro/Accelerometer
Keyboard matrixTrackpad / Slider
SPI bus
I2C bus Column
GPIOs
Row
GPIOs
Int
Two AAA
batteries
Mic Buzzer
IR
transmitter
Int
Figure 1: System Block Diagram
The system is based on DA14585 Bluetooth low energy SoC with Audio Interface. All peripheral
devices are directly connected to the DA14585, minimizing the external component count.
Two AAA batteries connected in series supply a nominal voltage of 3 V to the system power rail.
DA14585 and all peripheral devices are powered by this rail.
The system features two data buses:
●The I2C bus, to which the trackpad or slider controller is connected. Slider and trackpad cannot
coexist due to physical limitations.
●The SPI bus which is shared between the SPI Flash memory and the gyro/accelerometer sensor.
Care must be taken to keep the chip select (CS) signal of the gyro/accelerometer sensor de-
asserted during in-system programming of the SPI Flash memory.
The rest of the peripheral devices are connected to DA14585 GPIO pins. The peripheral devices
used in the RCU reference design are listed in Table 1.
Table 1: Voice RCU Key Peripheral Components
Block
Part Number
Interface
Comments
Flash Memory
Macronix
MX25R2035F
SPI
External Flash memory with SPI interface used to
store the firmware and the bonding data
Key Matrix
-
7 GPIOs
12 keys, 4 x 3 key matrix configuration
Gyro/Accelerometer
Bosch BMI160
SPI, interrupt
line
Accelerometer and gyro sensor used for the pointing
device functionality
Trackpad Controller
Azoteq IQS572
I2C, interrupt
line
Trackpad controller used in the trackpad add-on
module

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Block
Part Number
Interface
Comments
Slider/Scroll Wheel
Controller
Azoteq IQS263
I2C, interrupt
line
Trackpad controller used in the scroll wheel add-on
module
Buzzer
CUI
CSS-I4B20-SMT
1 GPIO
Magnetic buzzer for sound indications
IR LED
Kingbright
WP7113F3BT
1 GPIO
IR LED transmitter
Microphone
Knowles
SPK0838HT4H-B
PDM
PDM microphone for audio capture
Debug Connector
-
SWD, UART
2 x 5 pins 1.27 mm pitch female connector with SWD
debug and UART interface
The reference design board features a debug connector which can be used to connect a debugger to
the CPU, perform in-system programming of the SPI Flash memory and connect to a console to log
the debugging messages. The pinout of the debug connection is depicted in Table 2.
Table 2: Debug Connector Pinout
Pin
Signal
Pin
Signal
1
UART Tx
2
UART Rx
3
Debugger SWCLK
4
Debugger SWDIO
5
-
6
Reset
7
Power supply (Note 1)
8
GND
9
Power supply (Note 1)
10
GND
Note 1 The system power supply can be switched between battery supply and debug connector supply, using
the switch located at the left side of the RCU reference design.
The reference design board also features a test connector, the pinout of which is depicted in Table 3.
Table 3: Test Connector Pinout
Pin
Signal
Pin
Signal
1
-
2
-
3
GND
4
GND
5
GND
6
GND
7
P2_6 (I2C SCL)
8
P0_7 (Buzzer)
9
P2_7 (touchpad interrupt)
10
P2_5 (I2C SDA)
11
P2_4 (Keyboard row 4)
12
P2_8 (Keyboard column 1)
13
P2_3 (Keyboard row 3)
14
P0_2 (Keyboard column 3)
15
P2_2 (Keyboard row 2)
16
P0_1 (Keyboard column 2)
17
P2_1 (Keyboard row 1)
18
SWCLK
19
SWDIO
20
VBAT3V

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6 Using the Reference Design Board
Reset
button
LEDs
Power
switch
Trackpad
Microphone
DA14585
Motion
sensor SPI Flash
Figure 2: Voice RCU with Trackpad
Connect the debugger as shown in Figure 3 and follow the steps in Table 4 to build and download
the firmware. Section 6.3 explains how to use the hardware.
6.1 Connecting the Debugger
Figure 3: Connecting the Debugger

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6.2 Building and Downloading the Firmware
Table 4: Steps for Building and Downloading the Firmware
1
After you unzip the release archive,
you will find these contents.
2
Double click file rcu_585.uvprojx in
projects\target_apps\rcu\rcu_585\
Keil_5.
3
Open file user_config.h from the
user_config group in the Keil
development environment and make
sure either HAS_TOUCHPAD_TRACKPAD
or HAS_TOUCHPAD_SLIDER is defined,
depending your RCU configuration.
4
If you want to use the audio feature
with custom HID reports instead of
the custom Dialog Audio service,
make sure that
AUDIO_USE_CUSTOM_PROFILE is
undefined.

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5
Make sure you have a license for
code size over 32K, by opening menu
License Management from the File
menu. If no license is shown, please
contact Keil to obtain a license.
6
Build the project by pressing key F7,
or click the Build button.
If you want to:
●Build and download the firmware
to other hardware, follow the
steps in Table 42.
●Convert the output to a SUOTA
image follow the steps in
Appendix C.
7
Start a debugging session by
pressing Ctrl+F5 or by using the
Debug menu.
8
Press key F5 or click the Run button
to start code execution.

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6.3 Using the Hardware
6.3.1 Connecting and Testing the Keypad and Sound
Table 5: Steps for Connecting and Testing the Keypad and Sound
1
Install the Dialog Voice RCU app
from the Google Play Store.
2
Open the application on your
Android device.

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3
Make sure Bluetooth is enabled.
4
Tap on SCAN and press a button on
the RCU so that it starts advertising.
If the RCU was already paired with
your device and you want to
reconnect the RCU from scratch,
follow the steps in Table 41 first.

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5
Select the RCU and wait while it
connects and initializes.
6
The screen where you can test the
keypad appears.

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7
Press # on the RCU to toggle
between the MOUSE and KEYPAD
mappings.
8
Tap on the app menu and select
Sound to test the audio functionality.

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9
The Sound screen appears.
10
Select the required audio bit rate.
When Automatic is chosen, the bit
rate adapts dynamically.

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11
Let the language be automatically
detected or select among English,
Chinese, Dutch, French, German,
Greek, Italian, Japanese, Korean,
Russian, and Spanish.
12
Select the operating mode of the
application:
●Live Capture: record audio and
playback (see step 13).
●Voice Command: record audio,
recognize and process the
command (see step 14).

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13
When Live Capture is chosen, you
may attempt Voice Recognition
after the audio is captured.
14
When Voice Command is chosen,
you may select where to submit your
keyword.