[ECOS] Timecritical interrupt-debuging ... printf in DSR's ... Cyg_Scheduler_Implementation::rem_thread() ... cyg_assert_fail()

["Oliver Munz" <oli@snr.ch>]

Hi

To debug an USB-driver, I used diag_printf(). Unfortunatly this function 
blocks my DSR longer then the USB-specifications allowed to. So I tryed to 
send the debug-output over the standard at91-serial-driver, configurated 
with a 2kByte buffer.

This works fine a short time and fail:

CYG_ASSERT( ((queue_map & (1<<pri))!=0) == ((!run_queue[pri].empty())!=0), 
"Map and queue disagree");
in:

7 cyg_assert_fail() at e:\ecos\packages\infra\current\src\buffer.cxx:737
6 Cyg_Scheduler_Implementation::rem_thread() at 
e:\ecos\packages\kernel\current\src\sched\mlqueue.cxx:323
5 Cyg_Condition_Variable::wait_inner() at 
e:\ecos\packages\kernel\current\src\sync\mutex.cxx:636
4 serial_write() at 
e:\ecos\packages\io\serial\current\src\common\serial.c:362
3 cyg_io_write() at e:\ecos\packages\io\common\current\src\iosys.c:178


I don't know if it's allowed to use the buffered IO from ISR and DSR's. If 
everybody know's if it should work or not in threory, let me know.... Im 
also intressted in other hints how to debug driveres...

Thanks
Oliver Munz 


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