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Adaptive Front Lighting System

Adaptive Front Lighting System using STM MCU

  • MCU:STM8AF52AA control stepper motor driver L9942 through SPI
  • Adjust the horizontal and vertical direction of headlights
  • L9942 register data can be sent to the computer through URAT
  • Monitoring step motor real-time working state
  • LED display of the run or stall status



  • L9942: Stepper Motor Driver for Bipolar Motors with micro-stepping ( full, half, mini and micro-stepping )
  • Protection of short circuit, open load, overload
  • Over temperature warning and thermal shutdown
  • Full-scale current programmable


System Block Diagram