Union & Struct Example

union_struct.ino

typedef struct Scr_t {
    union {
        u16 data;
        struct {
            u16 tile    : 10;
            u16 hflip   :  1;
            u16 vflip   :  1;
            u16 pal     :  4;
        };
    };
} scr_t;

scr_t se;

void setup() {
    se.pal= 1;                  // Set via C bitfields
    se.data= 0x1000;            // Set manually (overwrites all fields)
}

void loop() {}