In order to simplify the development steps of embedded software for Cortex-M core microcontrollers and enhance software portability, this paper briefly introduces the file structure, mutual connection, and functional role of the microcontroller software interface standard (CMSIS) and ST\'s standard peripheral library V3.5, and takes the STM32F103VET6 with Cortex-M3 core as an example to give the development steps in the IAR FOR ARM6.30 programming environment. Combined with specific applications, this paper sets data ports and interrupts to shorten development time and improve code efficiency.
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