On Tue, Aug 05, 2008, TriKri wrote: > > I have an embedded system, a box, with a MIPS processor on it, which I need > to debug (stop and start the processor, tell what instructions it has > previously executed, etc.). I also have an EJTAG probe, which I have > connected between the computer's usb and the box, and written software for > it. The software can communicate with the probe, which in its own turn can > communicate with the box through the tap (test access port), by giving the > tap certain instructions. It can also, through the tap, feed the MIPS > processor with instructions, and read/write data from processor registers. > > The question is now, how can debug the processor? How do I stop it, do I > have to send any certain instructions to it? How can I set a breakpoint > (which I understand is a quite crucial point)? Can I use GDB with my > software to help debug the processor and how do I do that? I looked for Open Source EJTAG software a while ago and found two projects which may be of interest to you: http://svn.berlios.de/svnroot/repos/openocd/branches/mips/ http://www.totalembedded.com/open_source/jtag/mips32_ejtag/ But I didn't try to use any of it so far. Johannes
