CRT_2_OFFSET
reg |= (((output & CRT_2_MASK) >> CRT_2_OFFSET) <<
#define CRT_2_MASK (3 << CRT_2_OFFSET)
#define CRT_2_PRI ((0x0 << CRT_2_OFFSET) | CRT_2_USAGE)
#define CRT_2_SEC ((0x2 << CRT_2_OFFSET) | CRT_2_USAGE)