Principle and application of STM32 embedded system based on ARM Cortex-M3 Rinciples and applications of OpenHarmony embedded system based on RK2206 Principle and application of embedded system Principle and application of GNSS pseudolite positioning system Principle and application of object detection based on deep learning Principles and applications of ARM embedded microprocessor Principle and application of GPS reference stations system Principle and application of embedded single chip microcomputer system Key technology and application of intelligent test system based on cloud architecture Principle and application of ARM Cortex-M3 embedded system