Building the Sample Application
2
L2-4(1)
APP_CFG_USBD_EN enables or disables the USB application initialization code.
L2-4(2)
These #defines relate to the μC/USB-Device OS port. The μC/USB-Device core
requires only one task to manage control requests and asynchronous transfers,
and a second, optional task to output trace events (if trace capability is
enabled). To properly set the priority of the core and debug tasks, refer to
section 5-2-1 “Task Priorities” on page 69.
L2-4(3)
This #define enables the USB class-specific demo. The token XXXX in the
constant APP_CFG_USBD_XXXX_EN is the name of the class and can be replaced
by CDC , HID , MSC , PHDC or VENDOR .
L2-4(4)
Configure the desired size of the heap memory. Heap memory is only used for
μC/USB-Device drivers that use internal buffers and DMA descriptors which are
allocated at run-time. Refer to the μC/LIB documentation for more details on
the other μC/LIB constants.
L2-4(5)
Most Micriμm examples contain application trace macros to output human-
readable debugging information. Two levels of tracing are enabled: INFO and
DBG. INFO traces high-level operations, and DBG traces high-level operations
and return errors. Application-level tracing is different from μC/USB-Device
tracing (refer to Chapter 13, “Debug and Trace” on page 231 for more details).
L2-4(6)
Define the application trace level.
L2-4(7)
Specify which function should be used to redirect the output of human-
readable application tracing. You can select the standard output via printf() ,
or another output such as a text terminal using a serial interface.
39
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