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

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 9/18/2018

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: www.ruf.rice.edu/~mobile/elec424/ MSP430 microcontroller 9/18/2018

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 9/18/2018

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 9/18/2018

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) 9/18/2018

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 9/18/2018

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 9/18/2018

Orbit Platform Applications Orbit Watch with motion gesture recognition Orbit ECG health monitoring system Orbit Remote with motion gesture recognition 9/18/2018

Orbit Platform Applications 9/18/2018

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 Ti person 9/18/2018

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 9/18/2018

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 9/18/2018

DIP Switches DIP 1: Board power DIP 2: Bluetooth power On 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 9/18/2018

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) 9/18/2018

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 9/18/2018

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! http://msdn.microsoft.com/windowsmobile/downloads/resourcekit/ 9/18/2018

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 9/18/2018

Q&A How relate project 9/18/2018

9/18/2018