什么是神秘的“CDC串行”设备以及为什么需要它? -- 4.2-jelly-bean 领域 和 samsung-galaxy-s-4 领域 android 相关 的问题

What is the mysterious “CDC Serial” device and why do I needed it?


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中文

我已经建立了我在线购买的零件的自己的PC电脑,我做了一个干净的Windows 7终极64位与SP1(完整版,没有OEM Bloatware),我跑了几次Windows Update以获得Microsoft的最新和最大的更新。我很高兴看到一切正常工作,没有任何问题,而不是软硬件。接下来,我将我全新的三星Galaxy S4 Plus(GT-I9506)手机连接到计算机上的免费USB端口。 3个不同的设备检测到Windows。

  • USB复合装置
  • Galaxy S4(SG)
  • CDC序列

src =

Windows自动安装并配置了前两个设备(请参阅上面的屏幕截图)。除"CDC串行" 设备外。它没有安装那个。

  1. 什么是"CDC串行" 设备?
  2. 为什么我需要它?
  3. 如何安装它?

我所做的第一件事是检查用户手册(完整的手册,而不是入门指南)。没有一个引用"CDC串行" 。我不是专家,但我明白了一些。安装"USB复合设备" ,以便Windows可以通过USB电缆与手机通信。 "Galaxy S4(SG)" 是我在安装过程中给手机给手机的名称,这是将Windows作为媒体播放器所呈现的设备,利用MTP协议,这是Windows资源管理器中的显示。

我该如何了解"CDC串行" 是在用户手册中未描述的是什么?在连接到PC时,我从未见过任何Android设备。我在谷歌上搜索了"CDC序列" ,我所能找到的只是人们为他们的手机做一些黑客,就像生根,改变的ROM,一般只是为了攻击它。

那么如果我不想做任何一个怎么办?配置"CDC串行" 设备仍然很重要?它是如何影响手机的功能,例如电话的功能。当在手机和PC之间同步数据时,如果我决定不想遵循这些黑客提示和技巧以尝试安装此设备?

我联系了三星技术支持,他们没有任何关于我在谈论的内容。他们说他们会调查它,但这就是它。根本没有帮助。

用户手册表示我可以将USB连接类型从MTP更改为PTP。它基本上使得手机本身呈现为窗口作为静态摄像机设备。我试过没有安装驱动程序的问题。 Windows仅检测到"Galaxy S4(SG)" 设备,并自动配置和安装。

b

在此模式下,只能在手机和PC之间传输图片文件。所以这是非常有限的,在我看来。但未检测到"CDC串行" 设备。怎么样?..

english

I've built my own PC computer from parts I purchased online, I did a clean install of Windows 7 Ultimate 64-bit with SP1 (full version, no OEM bloatware), and I ran Windows Update several times to get the latest and greatest updates from Microsoft. I was pleased to see that everything worked as expected, no issues whatsoever, not in software nor in hardware. Next, I connected my brand new Samsung Galaxy S4 Plus (GT-I9506) phone to a free USB port on the computer. Windows detected following 3 different devices.

  • USB Composite Device
  • Galaxy S4 (sg)
  • CDC Serial

a

Windows automatically installed and configured the first two devices (see screenshot above). Except the "CDC Serial" device. It didn't install that one.

  1. What is "CDC Serial" device?
  2. Why do I need it?
  3. How do I install it?

The very first thing I did was to check the user's manual (the complete manual, not the getting started guide). There is not a single reference to "CDC Serial". I'm not an expert, but I do understand some of this. The "USB Composite Device" is installed so that Windows can communicate with the phone over the USB cable. The "Galaxy S4 (sg)" is the name I gave to my phone during setup, and this is the device that presents itself to Windows as a media player, makes use of the MTP protocol, and this is what shows up in Windows Explorer.

How am I supposed to know what "CDC Serial" is if it's not described in the user's manual? I have never seen that before on any Android device when connected to a PC. I did a search for "cdc serial" on Google and all I could find was people doing some hacks to their phones, like rooting, changing ROM, and generally just hacking it.

So what if I don't want to do any of that? Is it still important to configure the "CDC Serial" device? How does it impact the functionality of the phone, e.g. when syncing data between the phone and the PC, if I decide I don't want to follow those hacking tips and tricks to try to install this device?

I contacted Samsung Technical Support about this and they had no clue what I was talking about. They said they would look into it, but that's it. No help at all.

The user's manual says I can change the USB connection type from MTP to PTP. It essentially makes the phone present itself to Windows as a still camera device. I tried that there were no issues with drivers not being installed. Windows detected only the "Galaxy S4 (sg)" device and it was automatically configured and installed.

b

In this mode, only picture files can be transferred between the phone and the PC. So this is very limiting, in my opinion. But the "CDC Serial" device was not detected. How so?..

     
     
     

回答列表

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最佳答案
 

我从来没有找到Windows也非常有用识别驱动程序。以下是USB CDC的一些信息。根据 wikipedia :

USB通信设备类(或USB CDC)是一个复合通用 串行总线设备类。班级可能包括多个 接口,如自定义控制接口,数据接口,音频, 或大容量存储相关的接口。

此外,称为USB软件资源中心的资源具有此概述CDC :

有三个类化构成通信定义 设备:通信设备类,通信接口类 和数据接口类。通信设备类是一个 设备级别定义并由主机使用以正确识别a 可以呈现几种不同类型的通信设备 接口。

所有这些都是开发者 - 发言,但它真的只是意味着USB CDC驱动程序帮助您的PC 1)了解您的手机可以提供的服务和2)开始与手机通话使用这些服务。我不知道你看到的CDC串行驱动程序代表什么服务,但我非常相信安装官方三星驱动程序您的手机将解析红色x(Windows自动安装的驱动程序有时是通用的,通常不足)。

在其当前状态下,用您的手机连接为MTP设备,您是否有任何问题传输文件或执行您想要使用PC手机执行的其他任何操作?如果您没有问题,那么CDC串行驱动程序可能仅用于将手机作为调制解调器或串行设备连接(以及从开发人员工具 adb )。如果您没有计划以这种方式使用手机,您可以安全地忽略CDC串行驱动程序的失败安装。

我不会过分压力,如果你遇到任何麻烦,就会安装三星驱动程序。

 

I've never found Windows to be very helpful in identifying drivers either. Here's some information for you on what USB CDC is. According to Wikipedia:

USB communications device class (or USB CDC) is a composite Universal Serial Bus device class. The class may include more than one interface, such as a custom control interface, data interface, audio, or mass storage related interfaces.

Additionally, a resource called the USB Software Resource Center has this overview of CDC:

There are three classes that make up the definition for communication devices: the Communication Device Class, Communication Interface Class and the Data Interface Class. The Communication Device Class is a device level definition and is used by the host to properly identify a communication device that may present several different types of interfaces.

All of that is developer-speak, but it really just means that a USB CDC driver helps your PC 1) understand what services your phone can provide it and 2) start talking to your phone to use those services. I don't know for sure what service the CDC Serial driver you see represents but I'm pretty confident that installing the official Samsung drivers for your phone would resolve the red X (the drivers that Windows installs automatically are sometimes generic and are often insufficient).

In its current state, with your phone connected as an MTP device, do you have any trouble transferring files or doing anything else you want to do with your phone from your PC? If you're not having trouble then it's possible the CDC Serial driver is only used for connecting your phone as a modem or serial device (as when communicating with your phone from the developer tool ADB). If you aren't planning to use your phone in this manner, you can safely ignore the failed installation of the CDC Serial driver.

I wouldn't stress too much over it and would install the Samsung drivers if you run into any trouble.

 
 
     
     

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