使用USB3.1取代传统的图像采集卡

您提到的帧大小太大，无法适应USB带宽。您试图在1.9 Gb/s（32 K*2K＊30）流，其中USB 3.1 GEN1可以流到最大约350 Mb/s的UVC类。



     以下为原文
  The frame size you mentioned is too large for the USB bandwidth to accommodate. You are trying to stream at 1.9 GB/s (32K * 2K * 30) wherein the USB 3.1 Gen1 can stream upto a maximum of around 350 MB/s for the UVC class.

谢谢，我很害怕。UVC类是否被USB 3.1 Gen 1标准限制到350MBS，或者UVC类也有限制吗？如果我使用USB 3.1 Gen 2，UVC类可以有更高的数据速率吗？
如果不是，这是否意味着我需要跳过UVC类，只需通过USB发送原始数据到PC。如果你知道任何2代设备控制器，塞浦路斯有。
此外，Gen 1标准列出5GBS作为最大数据速率，然而CyPress FX控制器只允许高达3.2GbS，CX控制器具有四个1GBS数据互连到成像设备，但将总数据速率限制为2.4GBS，这使得看起来CX的吞吐量实际上是SL。比FX更强大。是否有一个独立的CyPress控制器，让我访问整个5GBS Gen 1数据速率？
我可能可以得到5GBS，但我真的希望5.44 GBS的持续数据速率，以符合目前的成像标准，我正在使用。
我感谢您提供的任何指导，帮助我确定它是否值得从当前的接口移动到USB。



     以下为原文
  Thanks, I was afraid of that. Is the UVC class limited to 350MBs by the USB 3.1 Gen 1 standard, or does the UVC class have  a limit as well? If I was using USB 3.1 Gen 2 could the UVC Class have a higher data rate?
 
If not, does that mean I need to skip the UVC Class and just send raw data over USB to the PC. If so are you aware of any GEN 2 device controllers that cypress has.
 
Also, the Gen 1 standard lists 5gbs as the max data rate, however the Cypress FX controller only allows up to 3.2gbs and the CX controller has four 1gbs data interconnect to an imaging device, but limits the total data rate to 2.4gbs, which makes it look like the throughput of the CX  is actually slower than the FX. Is there a separate Cypress controler that will give me access to the entire 5gbs Gen 1 data rate?
 
i might be be able to get by with 5gbs but I really want 5.44gbs sustainted data rate to match the current imaging standard I am using.
 
I appreciate any guidance you can provide, in helping me determine if it is worth moving to USB from our current interface.

5 Gbps是USB 3.1 GEN1标准的信令速率。你也不能从理论上得到5 Gbps的数据速率。FX3不是UB3吞吐量的限制。从理论上讲，你可以达到最大的大约460 Mb/s的USB吞吐量。
与FX3，GPIF接口是32位@ 100兆赫最大。这样就可以提供大约400 Mb/s的吞吐量。
用CX3，GPIF接口是24位@ 100兆赫最大。所以，这给你大约300 Mb/s的吞吐量。
用UB3.1 GeN2，信令速率为10 Gbps。因此，吞吐量将仅仅是USB 3.1 GE1中的两倍。塞浦路斯目前没有任何USB 3.1 GeN2控制器在其投资组合中。



     以下为原文
  5 Gbps is the signalling rate of the USB 3.1 Gen1 standard. You cannot get 5 Gbps data rate theoretically as well. FX3 is not a limitation in the USB3 throughput. Theoretically, you can achieve a maximum of around 460 MB/s USB throughput.
 
With FX3, the GPIF interface is 32-bit @ 100 MHz max.. So that gives you around 400 MB/s throughput.
With CX3, the GPIF interface is 24 bit @ 100 MHz max. So, that gives you around 300 MB/s throughput.
 
With USB3.1 Gen2, the signalling rate is 10 Gbps. So, the throughput will be just the double of what you get in USB 3.1 Gen1. Cypress does not have any USB 3.1 Gen2 controller in its portfolio at present.

谢谢你，我感谢你的耐心和详细的反应。这给了我所需要的信息。



     以下为原文
  Thanks mddd, I appreciate you patience and detailed response. That gives me the information I need.

PCIe-8604是一块4口USB 3.0主控卡，专为工业和视觉相关应用设计。USB 3.0,或称作高速USB,是一项新兴的总线技术，10倍于USB2.0的传输速度，尤其适用于高速数据存储和图像设备。
绝大多数现有的USB 3.0卡兼用多个接口于一个USB 3.0控制核心上, 如此操作将会使得性能显著下降。为最大化每个端口的性能，PCIe-8604拥有4颗独立的RenesasμPD720202 USB 3.0控制核心和 x4 PCI Express® 二代接口实现当4个端口同时工作，每个端口都拥有高达5 Gbps带宽。除去带宽的优势之外,PCIe-8604 板载5V直流稳压电源可为外接USB设备提供稳定的5V直流电。
结合高带宽, 工业级电源设计和稳定的电缆连接, PCIe-8604将会为基于USB 3.0的各种设备的连接提供便利。它支持多种操作系统(诸如Windows XP, 7, 8,10 and Linux)。