#define PCD_GET_EP_TX_ADDRESS(USBx, bEpNum) ((uint16_t)*PCD_EP_TX_ADDRESS((USBx), (bEpNum)))
#define PCD_GET_EP_RX_ADDRESS(USBx, bEpNum) ((uint16_t)*PCD_EP_RX_ADDRESS((USBx), (bEpNum)))
另外以下代码标红色的地方为什么要这么写？
#define PCD_SET_EP_TX_ADDRESS(USBx, bEpNum, wAddr) \
do { \
__IO uint16_t *_wRegVal; \
uint32_t _wRegBase = (uint32_t)USBx; \
\
_wRegBase += (uint32_t)(USBx)->BTABLE; \
_wRegVal = (__IO uint16_t *)(_wRegBase + 0x400U + (((uint32_t)(bEpNum) * 8U) * PMA_ACCESS)); \
*_wRegVal = ((wAddr) >> 1) << 1; \
} while(0) /* PCD_SET_EP_TX_ADDRESS */ |
