CH_SWITCH
ch_switch = CH_SWITCH(7, 7) | CH_SWITCH(6, 6) |
CH_SWITCH(5, 5) | CH_SWITCH(4, 4) |
CH_SWITCH(3, 3) | CH_SWITCH(1, 2) |
CH_SWITCH(2, 1) | CH_SWITCH(0, 0);