![]() |_ Port 1: Dev 57, If 0, Class=Vendor Specific Class, Driver=, 12M : Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M |_ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M ![]() : Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M Integrated Rate Matching Hubīus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubīus 002 Device 057: ID 0483:374b STMicroelectronics ST-LINK/V2.1īus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root ~]$ sudo lsusb -t Integrated Rate Matching Hubīus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīus 001 Device 004: ID 04f2:b2ea Chicony Electronics Co., Ltd Integrated Camera īus 001 Device 007: ID 0a5c:21e6 Broadcom Corp. Output from sudo lsusb and sudo lsusb -t: ~]$ sudo lsusbīus 003 Device 002: ID 8087:0024 Intel Corp. usb usb2-port2: unable to enumerate USB device usb 2-2: device not accepting address 61, error -71 debugfs: Directory '02' with parent 'devices' already present! usb 2-2: new low-speed USB device number 61 using xhci_hcd usb 2-2: device not accepting address 60, error -71 debugfs: Directory '22' with parent 'devices' already present! debugfs: Directory '30' with parent 'devices' already present! usb 2-2: Device not responding to setup address. usb 2-2: new low-speed USB device number 60 using xhci_hcd debugfs: Directory '29' with parent 'devices' already present! usb 2-2: new low-speed USB device number 59 using xhci_hcd debugfs: Directory '28' with parent 'devices' already present! usb 2-2: device descriptor read/64, error -71 usb 2-2: new low-speed USB device number 58 using xhci_hcd Here is output from sudo dmesg: debugfs: Directory '27' with parent 'devices' already present! Problem: PC does not recognize STM32 as a Full Speed USB device. My goal: send a string using CDC_Transmit_FS(string,sizeof(string)) from a STM32F401RE (NUCLEO Dev board) to PC via Full Speed USB through Virtual Com Port. I am very new to STM32 micro controllers and I've been sitting with this problem for the last 3 days of so This is as much a software question as it is electronics question, but here we go.
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