at91sam7x的最新版Ucos-II内核源码.

				
				
				    
				        Atmel Corporation - USB Device HID Keyboard 1.4
				        
				    
				    
				    
				        USB Device HID Keyboard Project 1.4
				
				        
				            Main >
				            USB Framework >
				            HID Keyboard
				        
				
				        Purpose
				        
				            This application creates an USB HID (Human-Interface Device) keyboard on a host
				            computer. Pressing any of the buttons on the board outputs characters or special
				            keys on the host side.
				        
				
				        
				            Hardware Requirements
				            
				                This package can be used with the following Atmel evaluation boards:
				                
				                    AT91SAM7S-EK (except AT91SAM7S32)
				                    AT91SAM7X-EK
				                    AT91SAM7SE-EK
				                    AT91SAM7A3-EK
				                    AT91SAM9260-EK
				                    AT91SAM9261-EK
				                    AT91SAM9263-EK
				                    AT91SAM9RL-EK
				                    AT91SAM9XE-EK
				                    AT91SAM9G20-EK
				                
				            
				        
				
				        Description
				        
				            This examples enumerates as an HID keyboard device to the host computer. Most
				            operating systems have a default implementation of this class, so they will
				            recognize the keyboard transparently.
				        
				        
				            Once the device is fully configured by the OS, pressing the buttons on the
				            board will cause one of the following QWERTY keys to be sent: 'A', '9',
				            'Num. Lock' and 'Right Shift' (on evaluation kits with less than four buttons, it
				            is not possible to output the extra keys).
				
				            In addition, the third LED on the board will report the num. lock state of the
				            keyboard. This means that when pressing the num. lock button on the EK or the num.
				            lock button on the keyboard, the LED should turn on & off to reflect the change.
				        
				        
				            WARNING: on the SAM7X/XC evaluation kit, the project only works in internal flash.
				        
				       
				        Usage
				        
				            
				                Build the application.
				            
				            
				                Optionally, connect the DBGU port of the evaluation board to the computer
				                and open it in a terminal. Debug information generated by the application
				                will be visibled that way.
				            
				            
				                Settings: 115200 bauds, 8 bits, 1 stop bit, no parity, no flow control.
				            
				            
				                Download and run the program inside the evaluation board.  Please refer
				                to the SAM-BA User Guide,
				                the GNU-Based Software Development
				                application note or to the IAR EWARM User Guide,
				                depending on your chosen solution.
				            
				            In the terminal window, the following text should appear:
				            
				                
				                    -- USB Device HID Keyboard Project 1.4 --
				                
				            
				            
				                Connect the USB cable to the board. Traces should start to
				                appear on the terminal. If this is the first time the device is connected to
				                the PC, the operating system may take some time to install it.
				            
				            
				                Once the device is connected and configured, pressing any of the board 
				                buttons should send characters to the host PC. Pressing num. lock should
				                also make the third LED toggle its state (on/off).
				            
				        
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