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Trace on ARM7

Posted by Nobody/Anonymous on April 8, 2005
Is it possilbe to Trace the Scheduler directly on the ARM7 Controller not only in Dos? Im using a Philips LPC2138 Controller on an Keil board.
Thanks, sensej

RE: Trace on ARM7

Posted by Nobody/Anonymous on April 8, 2005
V2.6.1 has the changes, but in this version the definition:

#define tskSIZE_OF_EACH_TRACE_LINE( sizeof( unsigned portLONG ) + sizeof( unsigned portCHAR ) )


should be:

#define tskSIZE_OF_EACH_TRACE_LINE( sizeof( unsigned portLONG ) + sizeof( unsigned portLONG ) )


but this does not make too much of a problem.

RE: Trace on ARM7

Posted by Nobody/Anonymous on April 11, 2005
Thanks for quick answer. If I do so my Programm ends in the DAbt_Handler(0x00002CC0). Is there any bad definition of Memory?

RE: Trace on ARM7

Posted by Richard on April 11, 2005
Hi,

If your vWriteTraceToBuffer() trace macro is as defined by the V2.6.1 release and the tskSIZE_OF_EACH_TRACE_LINE definition is corrected as per the other post in this thread then the only other thing I can suggest is to check that the trace buffer is aligned on a four byte boundary. I'm not sure if the compiler will do this automatically for a byte array. You can force it using a #pragma, or by placing it in a struct following a long as per:

struct xBuffer
{
unsigned long ulDummy; // This will get alligned
char cTraceBuffer[ BUFFER_SIZE ];
}


Failing this, you can send me your modified file (presumably trace.c) and I can take a look at it (use the email address form the contacts page of the FreeRTOS.org web site).

Which processor are you using? I might be able to give it a go.


RE: Trace on ARM7

Posted by Richard on April 11, 2005
I meant tasks.c as the modified file - not trace.c!

RE: Trace on ARM7

Posted by Nobody/Anonymous on April 11, 2005
If the trace is already started when the scheduler starts then the time stamp will be zero - as in this file segment.


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