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

2. 2 8/18/2015 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 Phone

3. 3 8/18/2015 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/

4. 4 8/18/2015 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

5. 5 8/18/2015 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

6. 6 8/18/2015 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.

7. 7 8/18/2015 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

8. 8 8/18/2015 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

9. 9 8/18/2015 Orbit Platform Applications Orbit Watch with motion gesture recognition Orbit Remote with motion gesture recognition Orbit ECG health monitoring system

10. 10 8/18/2015 Orbit Platform Applications

11. 11 8/18/2015 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&sectionId=95&tabId=1527&family=mcu MSP430 F1611

12. 12 8/18/2015 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

13. 13 8/18/2015 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

14. 14 8/18/2015 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

15. 15 8/18/2015 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)

16. 16 8/18/2015 The Phones Windows Mobile OS (CE family) Bluetooth connectivity GPRS/EDGE connectivity (if necessary) 802.11 WLAN connectivity (if necessary) PocketPC: touchscreenSmartphone: no touchscreen

17. 17 8/18/2015 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/

18. 18 8/18/2015 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_ENBT_radio

19. 19 8/18/2015 Q&A