|
Hi, all
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.
Thank you
Yong
|
program not stable
Started by ●April 19, 2004
Reply by ●April 19, 20042004-04-19
|
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 |
