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Task Model
4
4-2-3 PROCESSING DEBUG EVENTS
μC/USB-Device contains an optional debug and trace feature. Debug events are managed in
the core layer using a dedicated task. Figure 4-5 describes how the core manage the debug
events.
   
   
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Figure 4-5 Processing USB Debug Events
F4-5(1)
The debug and trace module in the core contains a free list of USB debug
events. The debug events objects contain useful information such as the
endpoint number, interface number or the layer that generates the events.
F4-5(2)
Multiple μC/USB-Device layers take available debug event objects to trace
useful information about different USB related events.
F4-5(3)
Trace and debug information events are pushed in the debug event list.ggg
F4-5(4)
The debug task is dormant until a new debug event is available in the debug
event list. The debug task will parse the information contained in the debug
event object and it will output it in a human readable format using the
application specific output trace function USBD_Trace() .
F4-5(5)
The application specific output function outputs the debug trace information.
For more information on the debug and trace module, see Chapter 13, “Debug and Trace”
on page 231.
63
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