JTAGing JuiceBox Success
After realizing where I messed up in building my Wiggler JTAG dongle, I fixed the small problems and connected it back to the computer. I ran jtag (from openwince project) and detect’d the Wiggler… it worked flawlessly. Here was the output:
jtag> cable parallel 0×378 WIGGLER
Initializing Macraigor Wiggler JTAG Cable on parallel port at 0×378
jtag> detect
IR length: 4
Chain length: 1
Device Id: 00011111000011110000111100001111
Manufacturer: Samsung
Part: s3c44b0x
Stepping: 0
Filename: /usr/local/share/jtag/samsung/s3c44b0x/s3c44b0x
jtag>
In addition, I ran ocdremote, which recognized the Wiggler, connected to it immediately, and setup the local TCP server for GDB to connect to. I ran the arm-elf-insight (Insight is a standalone frontend to GDB) that is packaged with the GNUARM toolchain, and connected to OCDRemote. After the connection I could view all of the juicebox’s CPU registers and internal RAM. I could also step through the program instructions.
Now I’m compiling jtager over cygwin so I can dump the internal RAM of the CPU and compare some of it to the chunks that are posted on the linuxhacker forums…
Soon I’ll write a tutorial for integrating OCDRemote with GDB with Code::Blocks, so people can easily develop and debug all ARM7 projects through Code::Blocks. Finally, I can uninstall eclipse.
