Introduction to the Orbit Edu Board Ahmad Rahmati Teaching Assistant, ELEC424 Rice Efficient Computing Group Sep 12, 2007
Dec 24, 2015
Introduction to the
Orbit Edu Board
Ahmad RahmatiTeaching Assistant, ELEC424
Rice Efficient Computing GroupSep 12, 2007
204/19/23
The Rice Orbit Platform
User input
Orbit Watch
Commands
GPRS / WiFi
Orbit Sensors
Orbit Edu
Applications: Health monitoring Multimedia experience recording Remote, ambient phone interaction Educational
Bluetooth
BluetoothBluetooth
Phone
304/19/23
The Orbit Edu Board TI MSP430 F1612 Microcontroller
16-bit, 8 MHz, Ultra-low-power (~1uA in standby) 55 KB Flash ROM, 5 KB RAM 2 timers (16-bit) 8 ADC inputs (12-bit) 2 DAC outputs (12-bit) 2 UART ports 48 General Purpose IO (GPIO)
MSP430 microcontroller
Manual available on course web page:www.ruf.rice.edu/~mobile/elec424/
404/19/23
The Orbit Edu Board KCWireFree KC21 Bluetooth 1.2 Module
Small, power efficient, built in antenna Separate regulator, microcontroller controllable Serial communication with MSP430 LED indicators on board for BT power, BT enabled, BT radio Class 2, up to 20m range
1 unused UART port
KC21 Bluetooth module
BT power
BT enabled
BT radio
On module antenna
504/19/23
The Orbit Edu Board Kionix KXM52 3-axis accelerometer (motion sensor)
3 analog outputs for each direction Enable pin from MSP430
National Semiconductor LM20 temperature sensor Analog output Powered by MSP430 (P6.5)
2 unused ADC inputs / DAC outputs
KXM52 3-axis accelerometer
LM20 temp sensor
604/19/23
The Orbit Edu Board LCD connector
Contrast potentiometer Unregulated power
Standard TI JTAG programming connector Connectors for every pin on the MSP430 & BT module 8 touch sensor pads 4 pushbuttons Processor controllable indicator LED (P5.3)
Programming (JTAG) connector
Pushbutton
Pad (for touch sensor)
LCD connector
Indicator LED
Contrast pot.
704/19/23
The Orbit Edu Board Power from battery or power supply (DIP switch 1)
Li-Ion battery (40mAh, 3.7v) 4 – 6 volt external supply Regulated to 3.3 volt for MSP430, Bluetooth Current sense resistor in series (reminder: V=IR) Power LED
DIP-switch operation
DIP switches
Current sense resistor
Battery
External power connector
Regulator for MSP430
Regulator for BT module
Power LED
804/19/23
The Orbit Mini Similar to Orbit Edu
Amplified analog input MicroSD card
LCD connector
Power Switch
LEDs
BatteryMicroSD cardUniversal connector
Programming (JTAG) connector
Push buttons
904/19/23
Orbit Platform Applications
Orbit Watchwith motion gesture
recognition
Orbit Remotewith motion gesture
recognition
Orbit ECGhealth monitoring
system
1004/19/23
Orbit Platform Applications
1104/19/23
The MSP430 Microcontroller 64 pins Each pin can be configured:
Example: Pin 5
P6.6: bit 6 of port 6 (GPIO), input P6.6: bit 6 of port 6 (GPIO), output A6: ADC input 6 DAC0: DAC output 0
Must be configured in programs Unused pins should be configured as GPIO outputs
http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?familyId=911§ionId=95&tabId=1527&family=mcu
MSP430 F1611
1204/19/23
The MSP430 Microcontroller
Low frequency crystal oscillator Optional, present on board Accurate real-time clock Longer sleep intervals -> lower power usage
High frequency internal oscillator (VCO) Optional crystal can be soldered on board
Alternative clock source Crystal: accurate Internal: software controllable
1304/19/23
Programming the MSP430 IAR Embedded Workbench
C compiler & debugger Free version (4kb limit) available from ti.com Installed in lab computers
USB Programmer DIP 3: board powered by programmer DIP 4: board powered independently Get it from Lin
Lots of sample/driver code From ti.com From RECG
LCD driver and library BT communication / power management
1404/19/23
DIP Switches DIP 1: Board power
On: Battery Off: external / programmer
DIP 2: Bluetooth power On: Same as board Off: Separate regulator
DIP 3: Board power / programming On: Programmer powers board Off: Battery / external power source
DIP 4: Programming On: Programming on battery / external power Off: Not programming or programming with programmer power
On
Off
1504/19/23
Orbit Edu Energy Conservation BT module is the biggest power consumer
Power down when not transferring data Use power saving modes if absolutely necessary to maintain
connection
Peripherals (accelerometer, temp sensor, LCD, …) Disable / power down when not in use
MSP430 Write efficient, interrupt driven code Nothing to do? Go into low power states Minimize interrupts, minimize time CPU running
Use low frequency osc. instead of full speed osc. for timekeeping Use internal hardware frequency dividers (vs. software)
1604/19/23
The Phones Windows Mobile OS (CE family) Bluetooth connectivity GPRS/EDGE connectivity (if necessary) 802.11 WLAN connectivity (if necessary)
PocketPC: touchscreen Smartphone: no touchscreen
1704/19/23
Programming the Phones Visual Studio 2005
Free 90-day trial from microsoft.com Academic version for cheap Installed on lab computers Program in C++ / C# / …
Windows Mobile 5.0 SDK Free from microsoft.com PocketPC and/or Smartphone versions Includes phone emulator Installed on lab computers
ActiveSync Enables Windows XP/Vista to communicate with phone
(Installed on lab computers) Version 4.5+ sometimes incompatible with XP, use lower versions! Version 4.5+ required for Vista!
http://msdn.microsoft.com/windowsmobile/downloads/resourcekit/
1804/19/23
Bluetooth Communication Bluetooth Serial Port Profile (SPP)
Will be addressed by Lin
Orbit Edu Bluetooth module Connected to MSP430 UART 0 No flow control BT powered by DIP switch 2 or MSP430 P5.6 2 LED indicator outputs also connected to MSP430
BT_EN: Module enabled (P3.2) BT_radio: Radio activity / connection (P3.3)
Phone Bluetooth programming Independent socket connection to each Bluetooth device Sample code & introduction available on course page
BT_EN BT_radio
1904/19/23
Q&A