How to access anonymous union/struct member from another header data?

Question

I want to access a member of struct from some header data. Here is an example from my code:

char wk1[2];
union 
{
    unsigned short WORD;
    struct 
    {
        unsigned short SSBY:1;
        unsigned short OPE:1;
    } BIT;
} SBYCR;
char           wk3[5];
union {
    unsigned char BYTE;
    struct {
        unsigned char :7;
        unsigned char BCLKDIV:1;
    } BIT;
} BCKCR;

I want to set the bit SSBY to 0 in my main. and tried to access it directly in my main:

void main()
{
  SBYCR.BIT.SSBY=0;
}

but it gives me an error E0520020:Identifier "SBYCR" is undefined. I tried to define it again like:

union SBYCR BIT; //but it has an error E0520070:Incomplete type is not allowed
SBYCR.BIT.SSBY=0; // and this, it doesn't recognise the BIT i want, while i have so many variable called BIT.

Answer 1

你想要这个吗？

   SBYCR.BIT.SSBY=0;