ASF USB Composite Device Example HID keyboard and MSC

Human interface on SAML21-XPlain:

Introduction

This example shows how to implement a USB Composite Device with HID keyboard and Mass Storage interfaces on Atmel MCU with USB module.

Startup

The example uses all memories available on the board and connects these to USB Device Mass Storage stack. Also, the example uses the buttons or sensors available on the board to simulate a standard keyboard. After loading firmware, connect the board (EVKxx,Xplain,...) to the USB Host. When connected to a USB host system this application allows to display all available memories as a removable disks and provides a keyboard in the Unix/Mac/Windows operating systems.

Note

This example uses the native MSC and HID drivers on Unix/Mac/Windows OS, except for Win98.

• LED0 blinks when USB host has checked and enabled Keyboard and MSC interface
• SW0 down opens a notepad application on Windows O.S. and sends key sequence "Atmel ARM"
• Only SW0 down will generate a wakeup to USB Host in remote wakeup mode.

About example

The example uses the following module groups:

• Basic modules: Startup, board, clock, interrupt, power management
• USB Device stack and HID & MSC modules:
  services/usb/
  services/usb/udc/
  services/usb/class/msc/
  services/usb/class/hid/
  services/usb/class/hid/kbd/
• Specific implementation:
  • main.c,
    initializes clock
    initializes interrupt
    manages UI
  • udi_composite_desc.c,udi_composite_conf.h,
    USB Composite Device definition
  • specific implementation for each target "./examples/product_board/":
    • conf_foo.h configuration of each module
    • ui.c implement of user's interface (buttons, leds)

¹ The memory data transfers are done outside USB interrupt routine. This is done in the MSC process ("udi_msc_process_trans()") called by main loop.