DATA_REG_W
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
bus_space_write_multi_stream_2(bst, bsh, DATA_REG_W,
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
bus_space_write_2(bst, bsh, DATA_REG_W, 0);
tx_status = bus_space_read_2(bst, bsh, DATA_REG_W);
status = bus_space_read_2(bst, bsh, DATA_REG_W);
packetlen = bus_space_read_2(bst, bsh, DATA_REG_W);
bus_space_read_multi_stream_2(bst, bsh, DATA_REG_W,