Thesycon, with a demo version available at We have tested with a propretary solutions from Our experience shows the CDC ACM + MS composite USB driver is not well supported For Windows it is necessary the use of the following INF file: The CDC ACM only driver that comes with the Linux kernel is supported on both LinuxĪnd Windows. Use of the serial and mass storage functions.

The composite driver allows for simultaneous dev/ttyACM0 or COM1:) and as a USB thumbĭrive (e.g. The CDC ACM + Linux gadget MS driver is a USB composite gadget driver which implements the serialĬommunication and mass storage functions. USB Communication Device (CDC) and Mass Storage (MS) Device Class Specifications.Linux device (gadget) driver framework (last updated 2005).Mass Storage (MS) composite Linux gadget driver and how to use it with a Linux host PC and This document explains the Communications Device Class (CDC) Abstract Control Model (ACM) + 7.2 Test host and target accessing to USB mass storage file system with USB cable always connected.7.1 Test host only access to USB mass storage file system with USB cable always connected.5.2 How to use the mass storage function in Windows 7.5 Using CDC ACM + MS device with Windows 7 host.4.3 How to use the mass storage function in Linux.4.2 How to test the serial driver in Linux.4.1 Linux host device file identification.4 Using CDC ACM + MS device with Linux host.The following device classes have been identified: Each device class defines a set of semantics and a programming interface that devices of that class adhere to. For example they consist of a certain device class, but also an USB disk that has all the necessary drivers stored so that the device can be installed automatically, without the need to have access to a certain driver software.Ī device class describes a type of device, like an audio or network device. The device attaches to an RS-232 communications line and the operating system on the USB side makes the USB device appear as a traditional RS-232 port.Īlso asked, what is a composite USB device?Īn USB Composite Device is a peripheral device that supports more than one device class.

dev/sdf or E:).įurthermore, how does USB CDC work? USB communications device class (or USB CDC class) is a composite Universal Serial Bus device class. dev/ttyACM0 or COM1:) and as a USB thumb drive (e.g.

This allows the device to be registered on a host computer as a seral port (e.g. The CDC ACM + Linux gadget MS driver is a USB composite gadget driver which implements the serial communication and mass storage functions. usb_device_class_cdc - CDC ACM (serial port over USB) USB CDC (Communications Device Class) ACM (Abstract Control Model) is a vendor-independent publicly documented protocol that can be used for emulating serial ports over USB.

Linux usb cdc acm driver