Example Problem: Accelerometer Interface

• Accelerometer output has one wire!

  • Acceleration coded as the duty cycle
    • pulse-width/cycle-length
      • 20% = -128
      • 80% = +127
    • cycle time = 10ms

• Write a C program that measures the acceleration

  • Input is low-order bit of variable X
  • Assign result to variable Z
  • Make up whatever you need

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