怎样把单片机中的I/O口定义为结构体，例如P1口希望高手解答
怎样把单片机中的I/O口定义为结构体，例如P1口
#define uchar unsigned char
typedef struct Key
{
uchar P1;
uchar scanf;
}KEY;
为什么我编译的时候出现错误了


[解决办法]

C/C++ code

extern volatile near unsigned char       PORTA;extern volatile near union {  struct {    unsigned RA0:1;    unsigned RA1:1;    unsigned RA2:1;    unsigned RA3:1;    unsigned RA4:1;    unsigned RA5:1;    unsigned RA6:1;    unsigned RA7:1;  };  struct {    unsigned AN0:1;    unsigned AN1:1;    unsigned AN2:1;    unsigned AN3:1;    unsigned T0CKI:1;    unsigned AN4:1;    unsigned OSC2:1;    unsigned OSC1:1;  };  struct {    unsigned CVREF:1;    unsigned :1;    unsigned VREFM:1;    unsigned VREFP:1;    unsigned :1;    unsigned HLVDIN:1;    unsigned CLKO:1;    unsigned CLKI:1;  };  struct {    unsigned CVREFA:1;    unsigned :4;    unsigned LVDIN:1;  };  struct {    unsigned :5;    unsigned SS:1;  };  struct {    unsigned :5;    unsigned NOT_SS:1;  };} PORTAbits;