core_CM3

代码说明：

  STM32的内核是ARM CORTEX-M3，这个core_cm3.h包含的是一些内核相关的函数和宏定义，例如核内寄存器定义、部分核内外设的地址等等，其对应的是core_cm3.c文件。初学可以不管他，只要把它包含进工程里就行了，这里都是非常底层的函数，上层的一些函数直接调用它们了。如果对CORTEX-M3内核有兴趣或者基础较高，想深入了解这些函数，可以仔细研读一下。。(The kernel is the STM32 ARM CORTEX-M3, this core_cm3.h contains some kernel-related functions and macros, such as nuclear register definition, part of the nucleus peripherals address, etc., which corresponds core_cm3.c file. Beginners can take care of him as long as it is included into the project on the line, some of the functions here are very bottom of the function, the upper directly call them. If you are interested in higher CORTEX-M3 core or foundation, would like to learn more about these functions, you can carefully study. .)