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Yong Yang- > I am using TI DM642 to develop a video codec. I need to communicate with PC to > read/write encoded or decoded video stream via USB JTAG or TCP/IP Ethernet. > Sometimes my program runs very well. But sometimes it does not run correctly, with > problems such as TCP connection fails, or the encoded file written to PC hard disc > via JTAG can not be decoded. I always spend lots of time to reset the DSP board, > restart the PC or reload the program to get it run correctly. It seems my program > on DSP is not stable at all. However, my codec has no problem at all on Windows > Visual C++ platform before ported to DSP. Any possible reasons for it? Hope someone > can answer. That's a very general question. You will have to dive in and debug at a low level -- the nature of embedded system vs. PC. My first suggestion is to take the codec and TCP/IP out of the loop: just video data in, do something simple like reduce to b/w image, transfer to host PC over JTAG, store to file. Can you get that to work reliably? Once you have 100% repeatable code (runs same way every time) then start putting things back in. You will find the bug(s). -Jeff |