AnsweredAssumed Answered

stm32 usb cdc Device Descriptor Request Failed

Question asked by tx.txmsszd on Jun 16, 2016
Latest reply on Apr 13, 2018 by marjamaa.roman
hi,I am tring to use usb virtual port to transmit data to pc.
MCU:STM32F373 100pins

cubemx: usb device fs checked

usb:communication device class

PC: windows 10

heap size: 0x200
stack size :0x400

when i plug usb cable to pc,it can not be recognised.In device manager,it shows Device Descriptor Request Failed. ST VCP driver installed. BTW, when I debug it, it could goes into USB_LP_IRQHandler after MX_USB_DEVICE_Init() excuted.