1. Introduction to the Orbit Edu Board
Introduce their project
Ahmad Rahmati
Teaching Assistant, ELEC424
Rice Efficient Computing Group
Sep 12, 2007

2. The Rice Orbit Platform
GPRS / WiFi
Bluetooth
Orbit Edu
Commands
Bluetooth
Bluetooth
User input
Orbit Sensors
Phone
Applications:
Health monitoring
Multimedia experience recording
Remote, ambient phone interaction
Educational
Orbit Watch
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3. 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)
Manual available on course web page:
MSP430 microcontroller
9/18/2018

4. 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
BT enabled
BT power
BT radio
KC21 Bluetooth module
On module antenna
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5. KXM52 3-axis accelerometer
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
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6. Programming (JTAG) connector
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
Contrast pot.
Pushbutton
Indicator LED
LCD connector
Pad (for touch sensor)
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7. 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
External power connector
Regulator for MSP430
Current sense resistor
Power LED
Battery
Regulator for BT module
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8. Programming (JTAG) connector
The Orbit Mini
Similar to Orbit Edu
Amplified analog input
MicroSD card
Programming (JTAG) connector
Universal connector
MicroSD card
LCD connector
Battery
Power Switch
Push buttons
LEDs
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9. Orbit Platform Applications
Orbit Watch with motion gesture recognition
Orbit ECG health monitoring system
Orbit Remote with motion gesture recognition
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10. Orbit Platform Applications
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11. 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
MSP430 F1611
Ti person
9/18/2018

12. 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
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13. Programming the MSP430 IAR Embedded Workbench USB Programmer
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
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14. DIP Switches DIP 1: Board power DIP 2: Bluetooth powerOn
Off
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
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15. 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)
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16. The Phones Windows Mobile OS (CE family) Bluetooth connectivity
GPRS/EDGE connectivity (if necessary)
WLAN connectivity (if necessary)
PocketPC: touchscreen
Smartphone: no touchscreen
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17. 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
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!
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18. 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
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19. Q&A
How relate project
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20. 9/18/2018