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stm32f107 usb-otg can not produce interruption after long running

Question asked by ye.heikii on Jul 5, 2012
Latest reply on Jul 7, 2012 by Clive One

 STM32 experts, i am using stm32f107 usb-otg interface, and an function is virtual com port,i.e. receive UART data then send to PC go through usb-otg interface,i am using VCP_V1.3.1_Setup.exe driver that installed on PC, and the usg-otg lib is STM32_USB-FS-Device_Driver 3.3.0).

 The problem is I using USB_SIL_WRITE(EP1_IN,buff,len) funtion to send received data to PC periodically, and the OTGD_FS_Handle_InEP_ISR interruption function will be called when usb tx traffic completed.
 This fucntion can run very well about 10min or more longer, but it will not produce  OTGD_FS_Handle_InEP_ISR  interrupt anymore at some times,i.e.after USB_SIL_WRITE, usb-otg not produce any interruption about completed, or time-out,error or something else.
 This function work well on STM32103 not otg inteface.