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TMS320F280025C: 请解说一下这两个宏定义

serena he
Part Number: TMS320F280025C


在看F20028C官方例程时，遇到如下两个宏定义，


#define HWREG_BP(x) __byte_peripheral_32((uint32_t *)(x))

#define     HWREGB(x)      __byte((int16_t *)(x),0)

请解说一下这两个宏定义。谢谢