MLX_CMD_READSG
cmd = MLX_CMD_READSG;
{MLX_CMD_READSG, 0x0001, 1},
{MLX_CMD_READSG, 0x0002, 1},
{MLX_CMD_READSG, 0x0105, 3},
{MLX_CMD_READSG, 0x010c, 4},