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Chapter 13
13-1 USING DEBUG TRACES
13-1-1 DEBUG CONFIGURATION
There are several configuration constants necessary to customize the core level debugging
traces. These constants are found in usbd_cfg.h and are summarized in Table 13-1.
Constant
Description
13
USBD_CFG_DBG_TRACE_EN
This constant enables core level debugging traces in the
program so that transactional activity can be outputted.
USBD_CFG_DBG_TRACE_NBR_EVENTS
This constant configures the size of the debug event pool to
store debug events.
Table 13-1 General Configuration Constants
13-1-2 DEBUG TRACE OUTPUT
Core level debug traces are outputted from the debug task handler via an application
defined trace function USBD_Trace() . This function is located in app_usbd.c and it is up to
you to define how messages are outputted whether through console terminal printf()
statements or serial printf() statements for example. Listing 13-1 shows an example of an
implementation for USBD_Trace() with a serial printf() function.
void USBD_Trace (const CPU_CHAR *p_str)
{
App_SerPrintf(“%s”, (CPU_CHAR *)p_str);
}
Listing 13-1 USBD_Trace() Example
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