unplug usb cause waitforxfer error, how to reconnect the usb when error occur

[qiqic_2594061]

like the official example (cypress\EZ-USB FX3 SDK\1.3\application\c_sharp\streamer),i use the BulkEndPoint (begindataxfer waitforxfer finishdataxfer mode)  and set the ppk(2) ,queues(16)  can receive data perfectly，but when i unplug the usb that connected with the PC,my program failed in waitforxfer() ,my program cannot run the code bellow the red mark.

someone know how to fix the problem? when error occur above ,how can i renum && reconnect the usb device for continue my data receiving.

[Roy_Liu]

Please check if this helpful - BeginDataXfer / WaitForXfer behaviour

[qiqic_2594061]

hi yliu

can you speek Chinese?  hahaha

for your link above,

①  my code is accomplished by reference the official code as mentioned above,

②  when use official tools (streamer) ,for the beginning it works well(just  receiving datas from FPGA ) while unplug the usb and reconnected with my pc error occured ,just like the error that showed above, having no reaction ,and i cannot open the control center and streamer but i can find it in Task manager（background process）

so the problem is how to contine my datas receiving when i unplug my usb and replug it with my pc , how can i detect the errors when i use begindataxfer / waitforxfer / finishdataxfer in a loop, if i can detect the error ,i can reEnum the usb device and reconnecte it ,it just the problem confused me.

[YiZ_31]

Hi,

我用FX3 SDK 1.3.4 版本中的C++ streamer没有发现这个问题。如果传输过程中拔掉的话会出现如图所示的错误，再插上即可继续数据传输。