摘要： 在《NiosII那些事儿》串口实验中，有这样一段程序：sopc.h.......typedef struct{//接收寄存器union{ struct { volatile unsigned long int RECEIVE_DATA :8; volatile unsigned long int NC :24; }BITS; volatile unsigned long int WORD;}RXDATA;//发送寄存器union{ struct { volatile unsigned long int T... 阅读全文