Renesas RE01 256KB Application Note
Application Note
RE01 256KB Group
Ultra-Low Consumption Voice Recognition Wearable User Interface, Home
Appliance Remote Control (Bluetooth® communication)
Introduction
Conventional voice recognition devices often require AC power, but the ultra-low power RE family
enables voice recognition remote controls and wearable device user interfaces that can run without external
power sources for long periods of time on small batteries.
This application note describes the sample code, which combines voice recognition using the RECAIUS
Speech recognition middleware Voice Trigger, Bluetooth
Target Device
RE01 256KB Group
TM
・ RECAIUS
Corporation. Below, it is described as Voice Trigger.
Speech recognition middleware Voice Trigger is a product of Toshiba Digital Solutions
®
communication, and RGB light sensor processing.
TM
TM
・ RECAIUS
other countries.
・ Bluetooth
Bluetooth.
is a registered trademark or trademark of Toshiba Digital Solutions Corporation in Japan or
®
is a registered trademark or trademark of Bluetooth SIG, inc. USA. Below, it is described as
R01AN5686EJ0101 Rev.1.01 Page 1 of 11
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RE01 256KB Group Ultra-Low Consumption Voice Recognition Wearable User Interface,
Home Appliance Remote Control (Bluetooth® communication)
Contents
1. Specifications .......................................................................................................................... 3
1.1 Description of Sample Code .................................................................................................................... 3
1.1.1 Menu Selection ...................................................................................................................................... 3
1.1.2 Voice: Voice Recognition Mode ............................................................................................................ 3
1.1.3 Brightness: RGB Light Sensor Mode .................................................................................................... 4
1.2 Pins Used ................................................................................................................................................ 5
2. Operating conditions ................................................................................................................ 5
3. Discription of Software ............................................................................................................. 6
3.1 System configuration diagram ................................................................................................................. 6
3.2 Software Structure ................................................................................................................................... 6
3.3 Flowchart ................................................................................................................................................. 7
3.4 Clock Settings for each Mode ................................................................................................................. 9
3.5 Current Consumption .............................................................................................................................. 9
4. Get Sample Code .................................................................................................................... 9
5. Reference Documents ........................................................................................................... 10
Revision History .......................................................................................................................... 11
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RE01 256KB Group Ultra-Low Consumption Voice Recognition Wearable User Interface,
Home Appliance Remote Control (Bluetooth® communication)
1. Specifications
1.1 Description of Sample Code
This application note describes the sample code that combines voice recognition using Voice Trigger,
Bluetooth communication, and RGB light sensor processing. In the voice recognition mode, assuming handsfree operation like a smartwatch or smart glasses, the system recognizes the voice input to the microphone
and display the relevant information on the LCD according to the word detected by the voice recognition
software. The RGB light sensor mode is included as an additional feature as an example of sensor
processing in IoT edge devices. The application calculates the illuminance from the value obtained by the
sensor, and outputs the illuminance value via the LCD and also by BLE communication.
1.1.1 Menu Selection
Use the APP_SET (SW2) and APP_MODE (SW1) buttons to select a demo to run from the menu. The
selectable menus are "Voice" and "Brightness".
APP_SET (SW2): Decide (demo with triangle on the left edge is performed)
APP_MODE (SW1): Select the next demo (the left triangle moves)
Figure 1 shows the menu screen, Figure 2 shows the location of the buttons on the board.
Figure 1 Menu screen
Figure 2 Button position
1.1.2 Voice: Voice Recognition Mode
When " Voice " is selected from the menu, the demo transitions to the voice recognition mode. In this
mode, the Voice Trigger recognizes the voice input to the microphone and displays information on the LCD
depending on the word or phrase detected. The speech recognition result is also transmitted via Bluetooth
and displayed on the tablet PC running an Android app created by Renesas.
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RE01 256KB Group Ultra-Low Consumption Voice Recognition Wearable User Interface,
Output Result
LCD
Tablet PC
Turn on TV
TURN ON TV
Turn on TV
Turn off TV
TURN OFF TV
Turn off TV
Loud sound
LOUD SOUND
Loud sound
Small sound
SMALL SOUND
Small sound
Channel up
CHANNEL UP
Channel up
Channel down
CHANNEL DOWN
Channel down
Home Appliance Remote Control (Bluetooth® communication)
Figure 3 shows the operation in voice recognition mode, and Table 1 shows the words to be recognized
and the output results.
Figure 3 Recognition mode
Table 1 Correspondence between recognized words and output results*
Voice commands
1.1.3 Brightness: RGB Light Sensor Mode
When "Brightness" is selected from the menu, the illuminance value is calculated from the data obtained
from the RGB light sensor and displayed on the LCD. In addition, the illuminance value is transmitted via
Bluetooth and displayed time series graph of it on the tablet PC running an Android app created by Renesas.
Figure 4 shows the operation in RGB light sensor mode.
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