設(shè)備型號 CH347T
運行環(huán)境 :CentOS 7.6
驅(qū)動程序:ch343.ko (VCP版本驅(qū)動程序)
現(xiàn)象:我使8個CH347T連接到服務(wù)器上,用作嵌入式系統(tǒng)機器的LOG UART 串口。在長期的使用過程中,USB設(shè)備偶爾會出現(xiàn)自動斷開連接并重新又連接上的情況,使用dmesg 查看設(shè)備log 后發(fā)現(xiàn)如下情況
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[609927.815828] usb_ch343 1-6.1.4:1:2 ch343_update_status - unknown status received:len7, data0:0x1,date1:0x44
[609927.816326] usb_ch343 1-6.1.4:1:2 ch343_update_status - unknown status received:len7, data0:0x1,date1:0x44
上面這個會出現(xiàn)很多次
[618262.735118] usb 1-5.3.3: USB disconnect, device_number33
[618262.735391] usb_ch343 1-53.3:1.0: ch343 usb device disconnect
[618262.735688] usb_ch343 1-53.3:1.2: ch343 usb device disconnect
[618263.386810]?usb 1-5.3.3:new full-speed USB device number 12 using xhci-hcd
[618263.719535]?usb 1-5.3.3:not running at top speed ; connected to a high speed hub
[618263.719535]?usb 1-5.3.3:New USB Device found, idVendor=1a88, idProduct=55da
然后自己又連接上了,這種問題會導(dǎo)致串口中斷切斷了對該串口的監(jiān)控,導(dǎo)致傳輸?shù)膌og丟失,咨詢了一些驅(qū)動工程師,他們認為可能和該設(shè)備的驅(qū)動程序設(shè)計有一定的關(guān)系,希望能解決一下。
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