Posted on April 04, 2013 at 11:01 I solve this problem by changingCDC_IN_FRAME_INTERVAL to 0 in usbd_conf.h , and now all work fine. Also i use this fix https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/DispForm.aspx?ID=24294 ...

Posted on April 04, 2013 at 10:47 I solve this problem by changingCDC_IN_FRAME_INTERVAL to 0 in usbd_conf.h , and now all work fine. Also i use this fix https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/DispForm.aspx?ID=24294 ...