Project Name: PriorityCallback

Project Type:
	ADSP-BF533 [ ]
	ADSP-BF537 [X]
	ADSP-BF561 [ ]
	
Hardware Used:
	EZ-Kit Buttons and LEDs
	
System Services Components Used:
	DMA Manager                         [ ]   Deferred Callback Manager   [X]
	Interrupt Manager                   [X]   Timer Module                [X]
	Power Management Module             [ ]   Flag Module                 [ ]
	External Bus Interface Unit Module  [ ]   Port Module                 [ ]
	
Example Overview:
	
	This example uses general purpose timer 0 and sets up deferred callbacks with 
	different priorities.  If two or more callbacks are posted at the same time, 
	the highest priority callback will be handled first, the second highest second 
	and so on.

	When the program starts, it initializes and sets up the interrupt manager, the
	callback manager, and the timer manager.  It hooks and enables an interrupt for 
	the timer, creates a callback queue using a different interrupt, initializes 
	timer 0, and loops infinitely.

	When a timer interrupt occurs, the handler posts 3 different callbacks, each
	of a different priority (low, medium, high).  

	Each of the callbacks has corresponding LEDs.  The high priority callback turns 
	on the first LED, and toggles the fourth LED.  The medium priority callback
	turns on the second LED, turns off the first LEd, and toggles the fifth. The
	low priority callback turns on the third LED, turns off the second, and toggles 
	the sixth.
  
	As a result, the first two LED's will APPEAR to remain off, because they are turned 
	off by a lower priority callback, immediately after they're turned on. The third 
	LED will appear to remain on, and LED's 4, 5 and 6 will toggle, to show that all 
	three callbacks are happening.
 

File  Structure:

	"./PriorityCallback.dpj" -  Main project file
	"./PriorityCallback.c"  -  Main source file (common)
	"./ezkitutilities.c"  - EZ-Kit utilities source file for Blackfin processors
	"./ezkitutilities.h"  - EZ-Kit utilities include file for Blackfin processors	
	
System Configuration:
	Defaults

	External connections: None


Getting Started:

	1)	Load Project file "PriorityCallback.dpj"
	2)	Build Project by selecting "Project->Rebuild Project"
	3)	Select "Debug->Run"
	4)	Observe the behavior described above.
	5)	When finished, select "Debug->Halt" to stop the program.