int pre_data = 0xE0E0;
pre_data <<= 16;
If you take a 16-bit integer and shift it left 16 bits the results will be 0. Probably not what you wanted.
int pre_data = 0xE0E0;
pre_data <<= 16;
If you take a 16-bit integer and shift it left 16 bits the results will be 0. Probably not what you wanted.