emUSB-Host Mass Storage Device
The Mass Storage Device (MSD) is a USB class protocol defined by the USB Implementers Forum. The class itself is used to get access to one storage medium or multiple storage mediums. Using this class, emUSB-Host provides access to external storage media such as USB-sticks and external hard disk drives.
Structure of MSD Component
A mass storage device connected to emUSB-Host is added to the file system as a volume. All operations on the device, such as formatting, reading / writing of files and directories are performed through the API of the file system. With emFile, the device name of the first MSD is "msd:0:".
Example Code Included
Example code which is provided with any shipment or eval software including emUSB-Host. The example shows the capacities of the connected device (such as the volume size, number of sectors, etc.) and shows files in the root directory and creates and writes to a file.