entering superloop niche while using uCOS ?

Altera_Forum · ‎02-21-2011

Dear all,

Currently I'm developing a gigabit ethernet interface project on Stratix IV. The FPGA has to receive data continuously from a DSP board and transmit them to PC. The connection between the FPGA and the PC is via TCP/IP. So it means the FPGA has to send data via TCP/IP in repetition (transmitting data for each data packet).

I have written the C code based on the SimpleSocketServer, and the current design can transmit the data discretely (not continuous data). However, when I tried to make it transmit the continuous data (just adding iteration in the TCP/IP transmisiion process), I got the following error :


dtrap - needs breakpoint
dtrap - needs breakpoint

From this forum, somebody ever said that this "dtrap - needs breakpoint" error may happen when we use superloop niche mode. However, in my design I think I don't use the superloop niche because my design use uCOS-II.

So anyone, please help me to figure out how to solve this problem... Or if anyone ever develop a system that transmit continuous data like me, please kindly give me an example of the appropriate way in C code to handle this thing. :(

Thanks

Altera_Forum · ‎02-21-2011

like the name says, to find out what is happening you need to run your application with a debugger and put a breakpoint on dtrap(). Then when the debugger stops, go up in the function call list and find out where dtrap() was called. If you are lucky you'll find a comment next to the call saying what the problem is. The Interniche stack developers were too lazy to write real error messages.