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TMS320F280039C: 寄存器操作内置函数无说明

Part Number: TMS320F280039C


#define HWREG_BP(x) \
__byte_peripheral_32((uint32_t *)(x))
#define HWREGB(x) \
__byte((int16_t *)(x),0)

函数__byte_peripheral_32((uint32_t *)(x))
函数__byte((int16_t *)(x),0)

这2个函数的作用是啥?找不到任何解释?找不到任何说明?