AT90USBxxx Mouse demonstration

License

Use of this program is subject to Atmel's End User License Agreement.

Please read file lic_page for copyright notice.

Description

This embedded application source code illustrates how to implement a HID mouse application over the AT90USBxxx controller.

About the sample application

By default the sample code is delivered configured for STK525, but this sample application can be configured for STK525, STK600 or AT90USBKey hardware, see TARGET_BOARD define value in config.h file.

About the source code

This source code is usable with the following compilers:

• IAR Embedded Workbench (5.11A and higher)
• AVRGCC (WinAVR 20080411 and higher).

Support for other compilers may required modifications or attention for:

• compiler.h file
• special registers declaration file
• interrupt subroutines declarations

Revision

V2.0.6

USB Device:

• Fix bug about back drive voltage on D+ after VBus disconnect (USB Certification)
• Fix bug during attach (the interrupt must be disable during attach to don't freeze clock)
• Fix request "reset interface"

V2.0.5

USB Stack

• Improve Attach/detach behavior for USB certification

V2.0.4

USB Stack

• Improve USB enumeration

V2.0.3

USB Stack

• Improve USB protocol to have a USB chap9 and HID compliance

Fix error on DataFlash I/O initialization

V2.0.2

USB Stack

• Add three possibilities for SN on USB
• Move VBus interrupt to VBus pooling
• Fix USB constant about Device Status

New watchdog driver

V2.0.1 and before

Old versions

Architecture

As illustrated in the figure bellow, the application entry point is located is the main.c file. The main function first performs the initialization of a scheduler module and then runs it in an infinite loop. The scheduler is a simple infinite loop calling all its tasks defined in the conf_scheduler.h file. No real time schedule is performed, when a task ends, the scheduler calls the next task defined in the configuration file (conf_scheduler.h).

The sample dual role application is based on two different tasks:

• The usb_task (usb_task.c associated source file), is the task performing the USB low level enumeration process in device mode.
• The mouse task performs mouse events decoding and report construction to the USB host.

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