Open-Source Orbit-EDU

PCB Documentation, including operation manual and components
Ready-to-Fabricate PCB design (OrbitEDUPCBDesign.zip, download), including source, Gerber files, and component list.

Software

Example code (OrbitEDUExample.zip download)
Properly configure IAR EWB (Tutorial) and import the workspace (OrbitEDU-Example.eww)
Code description:

main.c/h: entry point
accel.c/h: ADC configuration and accelerometer reading
bluetooth.c/h: Bluetooth configuration and UART0 interrupt handlers for Bluetooth communication
macro_definition.h: macro definitions used globally
MSP430_config.c/h: Configure various aspects of MSP430
timerA.c/h: timerA interrupt handler. Toggle LED5 every second

The program runs interrupt-driven. It starts from main() in main.c and enters a low-power mode, idle, with interrupt enabled. It will be waken up by a TimerA interrupt or UART0 interrupt. For example, when the UART0 finishes sending/receiving a BYTE, a UART send/receive interrupt is generated. The program will call its corresponding handler to process it and then go back to the low-power mode again. 

Orbit-EDU+Windows Mobile device

Example code for Windows Mobile: BTEPPC-1.0.zip (download) and Tutorial
Connect Windows Mobile with Orbit-EDU

1. Properly configure IAR EWB (Tutorial)
2. Set Orbit-EDU board switches 1 and 4 off, 2 and 3 on (toward the board edge).  No battery or external power supply required. See the hardware documentation.
3. Connect MSP-FET430UIF (See a picture) to the PC with IAR EWB and the Orbit-EDU board
4. In IAR EWB, Project->Rebuild All, and then Project->Debug, now IAR EWB will compile the code and download the binary into the MSP430 in the Orbit-EDU board.
5. IAR EWB will start run the code but pause for your further instruction. (See a picture). Select Debug->Go to run the code. After 1-3 seconds, LED1-3 are on, LED4 is flashing, and LED5 is  toggling every second.
6. On the Windows Mobile device, run BTEPPC, follow the tutorial to discover and connect to the Orbit-EDU board. The Orbit-EDU board is named "Orbit 0.1.01 3d," which can be changed in the Orbit-EDU board code (bluetooth.c: const BYTE BT_INIT_STRING[40] = "AT+ZV DefaultLocalName Orbit 0.1.01 3d\r\n";).
7. Click "View BT Traffic" button on BTEPPC to view the data exchange between the Orbit-EDU board and the Windows Mobile device.
8. Type in a text line and Click "Send." The Windows Mobile device will send the text line to the Orbit-EDU board, and the latter will simply send the text back to the former (See Orbit-EDU board code, bluetooth.c: __interrupt void ReceiveData()).

Contact

For bugs and suggestions, contact {rahmati, lzhong} AT rice DOT edu

Credits

Ahmad Rahmati (lead student)   Narendra Anand   Jiayang Liu

Acknowledgement and Disclaimer

This material is based upon work supported by the National Science Foundation under Grants IIS #0713249, CNS #0720825, CNS #0721894, and CNS #0751173. Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation (NSF).