Programming TinyOS and Java

1
Programming TinyOS and Java

• Andrew Redfern
• UC Berkeley

2
Outline

• TinyOS
• Events
• Times
• ADC
• I/O
• Java

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TinyOS Concurrency Model

• Commands and events are immediately invoked
• Like a function call
• Tasks execute to completion before the next task
  starts
• First in, first out (FIFO)
• Interrupts are asynchronous with respect to tasks
• They can happen at any time
• But do not interrupt other interrupt handlers
• Code invoked from a task is in task context
• All tasks should finish, never write a busy loop
• Code invoked from a interrupt is async or in
  interrupt context
• Tasks provide concurrency inside a component
• For longer running operations

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TinyOS Building Blocks

• Sample TinyOS applications
• TOSROOT/apps/
• Blink (the hello world of TinyOS)
• CountRadio/
• CountSend
• CountReceive
• OscilloscopeRF

5
TinyOS Java

• Mote Applications
• Oscilloscope
• OscilloscopeRF
• TOSBase
• Java Applications
• SerialForwarder
• Listen
• Oscilloscope
• MIG

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Running Java Applications

• SerialForwarder
• java net.tinyos.sf.SerialForwarder -comm \
  serial_at_COMltXgttelos
• Listen
• java net.tinyos.tools.Listen
• Oscilloscope
• java net.tinyos.oscope.oscilloscope

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Interacting with Hardware
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ADC Example
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ADC use for an Accelerometer

• Sample code
• 3-axis-accelerometer
• Tools
• SerialForwarder
• Oscilloscope

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User Button
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CountInput

• Location
• apps/CountRadio/
• COMPInput make install telosb

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Pager

• Sending Messages from the Computer to the mote
• java net.tinyos.tools.Pager
• I/O
• Three Leds (Red, Green, Blue)
• Vibrator Motor

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Helpful Tips

• Set your TinyOS Group ID to your class Group ID
• Use connectors when adding sensor boards to the
  mote. (DO NOT Solder to the Mote!)
• Be careful not to stress the battery pack
  connectors

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References

• TinyOS
• tinyos.net
• tinyos tutorial
• MoteIV
• moteiv.com
• My webpage
• kingkong.me.berkeley.edu/aredfern/