DRIVE_STRENGTH_BIT_MSK
DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(LOW),
DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(MED),
DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(HI),
tmp = DRIVE_STRENGTH_BIT_MSK(LOW);
tmp = DRIVE_STRENGTH_BIT_MSK(HI) - tmp;
setting = DRIVE_STRENGTH_BIT_MSK(HI) - setting;