With JTAG and GDB, our bin file can be downloaded into a board. I am
just curious about how these command work? Would you please explain
the meaning of each step I listed below?
1. type "./jp1-xilinx 9999" or "./jp1-xess 9999"
Q: What does this command do? From the screen information I guess
this command starts a JTAG proxy server in my host, and the server use
TCP port 9999 to communicate with other applications, e.g. GDB. Is this
guess correct?
2. in screen, "Connected to parallel port at 378"
Q: It seems the JTAG proxy server connected to the parallel port. But
what does "378" means? It is time or port number?
3. In screen info, there are several key words: "read / expected / npc /
ppc / rl"
Q: first what does npc/ppc/rl mean? and what is read & expected. Why
they are different? I remember they should be same then it works
properly.
4. "or32-uclinux-gdb hello.or32"
No question.
5. "target jtag jtag://localhost:9999"
Q: Does it connect 9999 port?
6. "load"
Q: Does it load the bin?
7. "set $pc=0x100" "c"
No question.
8. Are there any way to do the same thing in Windows OS? I have not
installed Linux in my test PC.
Best regards
Kobe
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