![]() Lsbusb -v Bus 001 Device 003: ID 1f00:2012Ĭouldn't open device, some information will be missingīInterfaceProtocol 1 AT-commands (v.25ter) Lsusb Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tabletīus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters usbcore: registered new interface driver cdc_acm cdc_acm 1-2:1.0: ttyACM0: USB ACM device usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 ![]() usb 1-2: New USB device found, idVendor=1f00, idProduct=2012 dmesg usb 1-2: new full-speed USB device number 3 using ohci_hcd But how to identify the root cause and get it fixed. ![]() However, in some cases, we can not change too much in OS. It seems both firmware and OS have issues. I have tried different tools, including gtkterm/echo/cat/stty/minicom/usbmon, python serial and lua.io. Maple STM32F103 USB driver (to be tested)Īnd firmware #1 doesn't work for #1/2/3 OS, while some other hardware may work with most of the OS.STM32F103C8T6_USBSerial from mbed community.I have tested the following boards/firmware: However I find the same device/firmware are not working well in all Linux OS. ![]() Due to development of IoT, I need a stable USB CDC ACM firmware in certain microcontroller.
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