Create MSC Applications

Create MSC Applications explains how to program a USB Mass Storage Device using the RL-USB Library. Mass Storage applications control USB sticks, cameras, or other external storage devices.

Include into the project and configure the following RL-USB Device Source Files:

1. The library that matches the device core:
   USB_CM1.lib - for Cortex-M1 devices.
   USB_CM3.lib - for Cortex-M3 devices.
   USB_ARM_L.lib - for ARM7 or ARM9 devices.
2. usb_config.c - to configure the USB system.
3. usbd_device family.c(.h) - to configure the device hardware layer.
4. DiskImg.c - to provide the disk image.
5. usbd_user_msc.c - to adapt the code to the application needs.
6. USBD_Demo.c - to initialize and connect the USB Device from main().

   ..
   usbd_init();                         // USB Initialization
   usbd_connect(__TRUE);                // USB Connect
   ..
   

Applications can be created using existing µVision MSC projects.

1. Copy all files from any folder \ARM\Boards\Vendor\BoardName\RL\USB\Device\Memory to a new folder and open the project *.uvproj with µVision. RTX projects are using the RTX-RTOS, whereas simple Memory projects work without an RTOS. However, the USB configuration does not differ.
2. Open the file usb_config.c and configure the USB device with the Configuration Wizard.
3. Enable USB Device and set the device characteristics.

   

4. Enable Class Support and Mass Storage Device (MSC) and set the characteristics.

   

5. Optionally, adapt the source file usbd_device family.c that contains hardware dependent code.
6. Optionally, modify the file DiskImg.c.
7. Modify the file usbd_user_msc.c to adapt the code to the application needs.

Note

• The options are explained in Mass Storage Device (MSC) Options.