嵌入式设备静电测试，出现usb转网卡设备断开（r8152）

[Evan_ZGYF丶]

嵌入式设备做静电测试，出现网络断开的现象，

通过 ifconfig 检查发现 eth1 网卡直接down了

在 dmesg 中看到部分异常打印：

<4>[  303.460931] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.465320] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.469700] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.474075] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.478451] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.482827] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.487204] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.491580] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.495954] r8152 3-1:1.0 eth1: Rx status -71                             
<4>[  303.500331] r8152 3-1:1.0 eth1: Rx status -71                             
<3>[  303.504805] usb usb3-port1: disabled by hub (EMI?), re-enabling...        
<6>[  303.511002] r8152 3-1:1.0 eth1: Stop submitting intr, status -71          
<6>[  303.517046] usb 3-1: USB disconnect, device number 2                      
<3>[  307.564637] usb usb3-port1: Cannot enable. Maybe the USB cable is bad?    
<3>[  311.491633] usb usb3-port1: Cannot enable. Maybe the USB cable is bad?    
<3>[  315.418641] usb usb3-port1: Cannot enable. Maybe the USB cable is bad?    
<6>[  319.353625] usb 3-1: new high-speed USB device number 7 using xhci-hcd    
<6>[  319.619552] usb 3-1: reset high-speed USB device number 7 using xhci-hcd  
<4>[  319.738900] xhci-hcd f98a0000.xhci: xHCI xhci_drop_endpoint called with di
sabled ep cf42a000                                                              
<4>[  319.747340] xhci-hcd f98a0000.xhci: xHCI xhci_drop_endpoint called with di
sabled ep cf42a030                                                              
<4>[  319.755775] xhci-hcd f98a0000.xhci: xHCI xhci_drop_endpoint called with di
sabled ep cf42a060                  

可能是什么原因？又该如何优化？

[bsnow]

这个需要改硬件，加ESD元件。需要看看你接口原理图

[yangkunhenry]

打到USB PIN脚了？在把USB Pin接上示波器打，看打到哪个PIN 导致的

[t_ianya]

USB传输异常重新枚举了，是不是USB没有加ESD静电防护？

[weixin_42755386]

正常usb每路都要做ESD，看下是不是每路多接了ESD防护

[「已注销」]

你的设备静电打的哪里？

[BananaJun]

ESD器件不是仅仅用来防静电的吗，串口打印 disabled by hub (EMI?), re-enabling，应该是EMI方面的问题导致HUB重启吧？加磁环磁珠之类的滤除EMI干扰更合适吗？不是很理解，有谁能解释下吗