本文深入解析HAL.Put和HAL.Get函数在嵌入式系统编程中的作用，通过实例展示了如何使用这些函数进行位操作，包括如何将特定值写入指定地址的内存中。详细解释了函数的实现原理及实际应用，为嵌入式系统开发者提供了宝贵的编程技巧。
#define HAL_PUT_UINT32(a, v) do {\
*(volatile unsigned long *)(a) = (unsigned long)(v);\
} while(0)
#define HAL_GET_UINT32(a) *(volatile unsigned long *)(a)
#define HAL_PUT_BITS(a,m,v) do { unsigned long val = *(volatile unsigned long *)(a);\
val = (val&(~(m)))|((v)&(m));\
*(volatile unsigned long *)(a) = (unsigned long)(val);\
}while(0)
For example：
*(volatile unsigned long *)(a) = (unsigned long)(v);\
} while(0)
#define HAL_GET_UINT32(a) *(volatile unsigned long *)(a)
#define HAL_PUT_BITS(a,m,v) do { unsigned long val = *(volatile unsigned long *)(a);\
val = (val&(~(m)))|((v)&(m));\
*(volatile unsigned long *)(a) = (unsigned long)(val);\
}while(0)
For example：
要将0xbf204004的第16~18bit写成101, ---> HAL_PUT_BITS(0xbf204004,7<<16,5<<16)
第二个操作数为mask，16-18共三bit，111，所以为7，写成101，对应为5.
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