Union and struct packing problem

Question

I\'m writing some software where each bit must be exact(it\'s for the CPU) so __packed is very important.

typedef union{
uint32_t raw;
struct{
    unsigned          


        

Answer 1

You don't mention that you are clearing out the bits of the structure beforehand, are you sure you aren't ending up with garbage bits left over in the first case?

// maybe try this
page_union_t p = {0};