MCAL, or Microcontroller Abstraction Layer, is a software layer in automotive embedded systems. It provides a hardware-independent interface to the microcontroller's peripherals, abstracting the hardware details and enabling higher-level software components to interact with the hardware without needing to know the specific microcontroller architecture. This improves code portability and reusability across different microcontroller platforms. MCAL is often a part of the AUTOSAR (Automotive Open System Architecture) standard.
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