TT1_SHIFT
data->trutherm &= ~(TT_MASK << TT1_SHIFT);
data->trutherm |= (TT_ON << TT1_SHIFT);
data->trutherm |= (TT_OFF << TT1_SHIFT);
data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT);