void vTraceEnable()

in AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorder/trcKernelPort.c [460:540]
56 lines of code
13 McCabe index (conditional complexity)

void vTraceEnable(int startOption)
{
	int32_t bytes = 0;
	int32_t status;
	extern uint32_t RecorderEnabled;
	TracealyzerCommandType msg;

	/* Only do this first time...*/
	if (HandleTzCtrl == NULL)
	{
		TRC_STREAM_PORT_INIT();
		
	   /* The #WFR channel means "Warnings from Recorder" and
		* is used to store warnings and errors from the recorder.
		* The abbreviation #WFR is used instead of the longer full name,
		* to avoid truncation by small slots in the symbol table. 
		* This is translated in Tracealyzer and shown as the full name,
		* "Warnings from Recorder".
		*
		* Note: Requires that TRC_CFG_INCLUDE_USER_EVENTS is 1. */
		
		trcWarningChannel = xTraceRegisterString("#WFR"); 

		/* Creates the TzCtrl task - receives trace commands (start, stop, ...) */
		#if defined(configSUPPORT_STATIC_ALLOCATION) && (configSUPPORT_STATIC_ALLOCATION == 1)
		HandleTzCtrl = xTaskCreateStatic(TzCtrl, STRING_CAST("TzCtrl"), TRC_CFG_CTRL_TASK_STACK_SIZE, NULL, TRC_CFG_CTRL_TASK_PRIORITY, stackTzCtrl, &tcbTzCtrl);
		#else
		xTaskCreate( TzCtrl, STRING_CAST("TzCtrl"), TRC_CFG_CTRL_TASK_STACK_SIZE, NULL, TRC_CFG_CTRL_TASK_PRIORITY, &HandleTzCtrl );
		#endif

		if (HandleTzCtrl == NULL)
		{
			prvTraceError(PSF_ERROR_TZCTRLTASK_NOT_CREATED);
		}
	}

	if (startOption == TRC_START_AWAIT_HOST)
	{
		/* We keep trying to read commands until the recorder has been started */
		do
		{
			bytes = 0;
			
			status = TRC_STREAM_PORT_READ_DATA(&msg, sizeof(TracealyzerCommandType), (int32_t*)&bytes);
			
			if (status != 0)
			{
				prvTraceWarning(PSF_WARNING_STREAM_PORT_READ);
			}

			if ((status == 0) && (bytes == sizeof(TracealyzerCommandType)))
			{
				if (prvIsValidCommand(&msg))
				{
					if (msg.cmdCode == CMD_SET_ACTIVE && msg.param1 == 1)
					{
						/* On start, init and reset the timestamping */
						TRC_PORT_SPECIFIC_INIT();
					}
					
					prvProcessCommand(&msg);
				}
			}
		}
		while (RecorderEnabled == 0);
	}
	else if (startOption == TRC_START)
	{
		/* We start streaming directly - this assumes that the interface is ready! */
		TRC_PORT_SPECIFIC_INIT();
		
		msg.cmdCode = CMD_SET_ACTIVE;
		msg.param1 = 1;
		prvProcessCommand(&msg);
	}
	else
	{
		/* On TRC_INIT */
		TRC_PORT_SPECIFIC_INIT();
	}
}